CN113398860A - Photocatalysis reduction carbon dioxide experimental apparatus - Google Patents
Photocatalysis reduction carbon dioxide experimental apparatus Download PDFInfo
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- CN113398860A CN113398860A CN202110733615.5A CN202110733615A CN113398860A CN 113398860 A CN113398860 A CN 113398860A CN 202110733615 A CN202110733615 A CN 202110733615A CN 113398860 A CN113398860 A CN 113398860A
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- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 title claims abstract description 38
- 229910002092 carbon dioxide Inorganic materials 0.000 title claims abstract description 32
- 230000001699 photocatalysis Effects 0.000 title claims abstract description 25
- 230000009467 reduction Effects 0.000 title claims abstract description 22
- 239000001569 carbon dioxide Substances 0.000 title claims abstract description 14
- 238000007146 photocatalysis Methods 0.000 title description 3
- 239000007788 liquid Substances 0.000 claims abstract description 60
- 238000006243 chemical reaction Methods 0.000 claims abstract description 22
- 239000000725 suspension Substances 0.000 claims abstract description 19
- 238000005286 illumination Methods 0.000 claims abstract description 14
- 238000006555 catalytic reaction Methods 0.000 claims abstract description 13
- 239000003054 catalyst Substances 0.000 claims abstract description 10
- 238000009434 installation Methods 0.000 claims abstract description 10
- 238000003756 stirring Methods 0.000 claims abstract description 8
- 238000002347 injection Methods 0.000 claims abstract description 4
- 239000007924 injection Substances 0.000 claims abstract description 4
- 230000007246 mechanism Effects 0.000 claims abstract description 4
- 238000005259 measurement Methods 0.000 claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 238000001514 detection method Methods 0.000 claims description 18
- 230000017525 heat dissipation Effects 0.000 claims description 15
- 230000001276 controlling effect Effects 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 11
- 230000000087 stabilizing effect Effects 0.000 claims description 9
- 238000003860 storage Methods 0.000 claims description 6
- 229910052724 xenon Inorganic materials 0.000 claims description 6
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000008054 signal transmission Effects 0.000 claims description 3
- 238000006722 reduction reaction Methods 0.000 claims 8
- 238000010531 catalytic reduction reaction Methods 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 129
- 238000013032 photocatalytic reaction Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000011344 liquid material Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000011941 photocatalyst Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000037361 pathway Effects 0.000 description 1
- 238000006303 photolysis reaction Methods 0.000 description 1
- 230000015843 photosynthesis, light reaction Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- -1 water) Chemical compound 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0006—Controlling or regulating processes
- B01J19/0013—Controlling the temperature of the process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0006—Controlling or regulating processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
- B01J19/0066—Stirrers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
- B01J19/12—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electromagnetic waves
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
- C01B3/04—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by decomposition of inorganic compounds, e.g. ammonia
- C01B3/042—Decomposition of water
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
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Abstract
An experimental device for photocatalytic reduction of carbon dioxide, comprising: the support frame comprises a frame body and a suspension; the illumination device is suspended on the suspension and comprises a shell, a reflector, a Fresnel lens, a light source and a power supply, wherein the shell is suspended at the end part of the suspension, and the bottom of the shell is provided with a light source installation cavity; the reflector surrounds the light source; the Fresnel lens is arranged right below the light source; the power supply is arranged at the top of the frame body; the catalytic reaction device comprises a temperature-controlled reactor, a control box and a stirring mechanism, wherein a catalyst support is arranged in a reaction cavity of the temperature-controlled reactor, the top of the temperature-controlled reactor is provided with an irradiation window, and the side wall of the temperature-controlled reactor is provided with a feed inlet, a discharge outlet and a temperature-controlled liquid injection port; a gas passage and a liquid passage are arranged in the control box; and the feeding device comprises a gas supply device and a liquid supply device, and a gas supply port of the gas supply device and a liquid supply port of the liquid supply device are respectively communicated with a gas inlet of the gas passage and a liquid inlet pipeline of the liquid passage. The invention has the beneficial effects that: can control the input light intensity, temperature and pressure and improve the photocatalytic reduction efficiency.
Description
Technical Field
The invention relates to a photocatalytic reduction carbon dioxide experimental device, and belongs to the field of solar energy utilization.
Background
Solar energy is used as a renewable energy source, and has the advantages of cleanness, environmental protection, realization of zero emission of carbon and the like. In 1972, the japanese scholars Fujishima and Honda discovered for the first time that TiO2 can decompose water into oxygen and hydrogen under ultraviolet light irradiation at normal temperature and pressure. This process of converting solar energy into chemical energy and promoting the synthesis or decomposition of other substances is called photocatalysis. In the next decades, the conversion of solar energy into chemical energy by semiconductor photocatalytic technology has been the focus of research. Especially, in the present day that people pay more attention to greenhouse gas effect, renewable energy sources are more concerned. At present, the photocatalytic technology is widely applied to hydrogen production by water decomposition, CO2 photocatalytic reduction and the like.
The photocatalytic reduction of CO2 is a complex reaction process, and besides the performance of the reaction process is influenced by the photocatalyst, the light transmission, the transmission of CO2 and a reducing agent (such as water), the distribution of light in a reactor and the like all have important influences on the reaction rate. The efficient photocatalyst can fully utilize sunlight by matching with the optimal design of the reactor, so that the efficient conversion of CO2 is realized.
Since the reaction can be carried out under natural light intensity and normal temperature and pressure, more researchers neglect factors such as temperature and pressure which the reactor is subjected to when designing the reactor. The reactor is mostly a normal atmospheric ambient pressure reactor, which is sufficient to allow the CO2 reaction to occur, but the rate is very limited.
Disclosure of Invention
In order to solve the problems, the invention provides a method for improving the photocatalytic reduction of CO by controlling the input light intensity, temperature and pressure2Efficient photocatalytic reduction of CO2An experimental system device.
The invention relates to a photocatalytic reduction carbon dioxide experimental device, which is characterized by comprising:
the support frame comprises a frame body and a suspension, and the suspension is arranged at the top of the frame body and used for mounting the illumination device;
the illumination device is suspended on the suspension and comprises a shell, a reflector, a Fresnel lens, a light source and a power supply, the shell is suspended at the end part of the suspension, which exceeds the frame body, and the bottom of the shell is provided with a light source installation cavity; the light source is embedded in the light source installation cavity of the shell, and a light outlet of the light source is kept aligned with the catalytic reaction device right below; the reflector covers the wall surface of the light source installation cavity and surrounds the light source; the Fresnel lens is arranged right below a light outlet of the xenon lamp light source and is used for converging light rays emitted by the light source into light spots to irradiate the light spots into the catalytic reaction device; the power supply is arranged at the top of the frame body, and the power supply end of the power supply is electrically connected with the power supply end of the light source through an electric wire and used for supplying power to the light source;
the catalytic reaction device is arranged right below the Fresnel lens and comprises a temperature-controlled reactor, a control box and a stirring mechanism, a catalyst support for fixing a catalyst is arranged in a reaction cavity of the temperature-controlled reactor, an irradiation window for transmitting light spots is arranged at the top of the temperature-controlled reactor, and a feed inlet, a discharge outlet and a temperature-controlled liquid injection port are formed in the side wall of the temperature-controlled reactor; the control box comprises a box body and is used for regulating and introducing CO2The main gas outlet of the gas passage is communicated with a feed inlet pipeline of the temperature control reactor, and a gas pressure increasing valve and a gas pressure reducing valve are matched at the main gas inlet of the gas passage to regulate the introduction of CO2The pressure of (a); a pressure stabilizing valve is arranged on the feeding pipeline between the total gas outlet of the gas passage and the feed inlet of the temperature control reactor and is used for adjusting and stabilizing the gas pressure in the reactor; a discharge pipe communicated with a discharge hole of the temperature control type reactor is sequentially provided with a back pressure valve and a stop valve, and the generated product gas is controlled to be introduced into an FID detector; a one-way valve is assembled at a liquid inlet of the liquid passage, and a liquid outlet of the liquid passage is communicated with a pipeline of a feed inlet of the temperature-controlled reactor; the power supply end of the power supply is electrically connected with the power supply end of the main controller;
the gas supply port of the gas supply device is communicated with the main gas inlet pipeline of the gas passage and is used for inputting gas into the reactor; the liquid supply device is arranged in the box body and is communicated with a feed inlet pipeline of the temperature control type reactor through a liquid passage.
Further, the gas passage comprises a main gas passage, a first gas measurement branch passage and a second gas measurement branch passage, the main gas passage penetrates through the box body, a gas inlet of the main gas passage is communicated with a gas supply device of the feeding device, and a gas outlet of the main gas passage is communicated with a feed inlet pipeline of the temperature-controlled reactor; the first gas measurement branch passage and the second gas measurement branch passage are communicated with the main passage and are sequentially arranged from front to back along the gas flowing direction in the main gas passage, wherein a booster pump is assembled at a gas outlet of the first gas measurement branch passage, a gas pressure reducing valve is arranged on a pipeline between the gas outlet of the first gas measurement branch passage and a gas inlet of the booster pump, and a pressure gauge is assembled at a gas detection port of the booster pump and is used for detecting the gas pressure in the first gas measurement branch passage; a vacuum pump is assembled at the gas outlet of the second gas measurement branch passage, a pipeline between the gas outlet of the second gas measurement branch passage and the gas inlet of the vacuum pump is provided with a gas booster valve and an inlet pressure sensor which are sequentially connected in series, and the control end of the vacuum pump is electrically connected with the pressure detection port of the main controller; a pressure detection port and a temperature detection port are arranged on the main gas passage between the gas outlet of the main gas passage and the second gas measurement branch passage, and the pressure detection port is provided with a reactor internal pressure gauge and a second pressure sensor; a temperature sensor is assembled at the temperature detection port, and the signal output end of the temperature sensor is electrically connected with the signal input end of the main controller; the water storage tank is arranged in the inner cavity of the tank body, a water through hole of the water storage tank is communicated with a feed inlet pipeline of the temperature control type reactor through a motor and a pipeline, and a one-way valve is arranged on the pipeline communicated with the water through hole.
Furthermore, the control box also comprises a control panel, the control panel is embedded on the surface of the box body, a display screen and control keys are arranged on the control panel, and a signal transmission control end of the display screen is electrically connected with a signal control end of the main controller.
Further, the temperature-controlled reactor comprises a reactor body with a reaction cavity and a heating device, the reactor body is arranged under the Fresnel lens, the top of the reactor body is provided with an irradiation window, one side wall of the reactor body is provided with a liquid inlet and a liquid inlet, the opposite side wall is provided with a discharge outlet, and the liquid inlet is provided with a temperature-controlled water injector for injecting liquid into the reaction cavity of the reactor body; the heating device comprises a heater and a temperature controller, wherein the heater is arranged on the outer end face of the reactor and is used for heating the material liquid in the reactor body; and the control end of the temperature controller is electrically connected with the control end of the heater and is used for controlling the temperature of the feed liquid in the reactor.
Further, a stirring device is arranged at the bottom of the temperature control type reactor and comprises a lifting support and a magnetic stirrer, the magnetic stirrer is placed at the top of the lifting support, and the light concentration ratio is adjusted by adjusting the distance between the reactor and the Fresnel lens; the temperature control type reactor is arranged at the top of the magnetic stirrer.
Further, a mass flow meter for measuring the gas flow in the pipeline and a mass flow controller for controlling the mass flow meter are assembled on the pipeline between the feeding device and the control box. Wherein: the pressure stabilizing valve, the back pressure valve, the one-way valve, the stop valve, the flowmeter, the mass flow controller and the corresponding pipeline form a complete gas flow path for controlling the gas material to enter and exit; the one-way valve, the stop valve and the corresponding pipeline form a complete liquid flow path for controlling the liquid material to enter and exit.
Furthermore, a control panel is arranged on the control box, and a signal connection port of the control panel is electrically connected with a signal connection port of the gas inlet pressure gauge, the pressure gauge in the reactor and the thermometer in the reactor respectively.
Further, the photocatalytic reduction of CO2The experimental system device also comprises a heat dissipation device, wherein the heat dissipation device is suspended at the end part of the suspension frame, which exceeds the frame body, and is positioned right above the illumination device; the heat dissipation device comprises a heat dissipation fan and a power supply, and an air outlet of the heat dissipation fan is aligned to an air inlet at the top of the shell and used for dissipating heat of the illumination device; and the power supply end of the cooling fan is electrically connected with the power transmission end of the power supply.
Further, the light source is a xenon lamp of 1000W-5000W, and the distance between the light source and the Fresnel lens is 10-40 cm.
The invention has the beneficial effects that: (1) the xenon lamp of the illumination device in the laboratory is provided with a high-precision reflector and a Fresnel lens, so that a sufficient light source is ensured, and meanwhile, light spots can be accurately focused on a catalyst; (2) the gas pressure and temperature of the catalytic reaction device can be adjusted through the control panel, so that the observation and operation of personnel are facilitated; (3) providing a condensing ratio of 1-400, a temperature of room temperature to 500 ℃, and a pressure of 0.1-10 MPa; (4) can be used for continuous photocatalytic reaction such as photocatalytic reduction of CO2And photolysis of water to produce hydrogen, etc.; (5) the process can be used for strengthening, and the aim of improving the corresponding photocatalytic reaction rate is fulfilled.
Drawings
FIG. 1 is a schematic view of a photocatalytic reaction system in a laboratory according to the present invention (arrows indicate light directions; a liquid supply device is omitted in the figure).
FIG. 2 is a structural diagram of the interior of a control box in a photocatalytic reaction system in a laboratory according to the present invention.
FIG. 3 is a top view of a photocatalytic reaction system in a laboratory according to the present invention.
FIG. 4 is a plan view of a photocatalytic reaction system in a laboratory according to the present invention.
In the figure: 1-frame body, 102-suspension, 2-shell, 3-heat dissipation device, 4-reflector, 5-light source, 6-power supply, 7-Fresnel lens, 8-gas inlet pressure gauge, 9-gas pressure reducing valve, 10-gas pressure increasing valve, 11-internal pressure gauge of reactor, 40-temperature sensor, 13-pressure stabilizing valve, 14-reactor body, 15-back pressure valve, 16-magnetic stirrer, 17-main gas passage, 18-wire, 19-one-way valve, 20-stop valve, 21-mass flowmeter, 22-temperature control type water injector, 23-gas supply device, 24-heating device, 25-lifting support and bearing; 26-a box body; 27-a gas passage; 28-a liquid pathway; 29-a master controller; 30-a liquid supply device; 31 — a first gas-measuring branch passage; 32-a second gas measurement branch passage; 33-a booster pump; 34-a vacuum pump; 35-inlet pressure sensor; 36-outlet pressure sensor; 37-a motor; 38-control panel; 381-display screen; 382-control keys; 39-power supply.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
With reference to the accompanying drawings:
embodiment 1 an experimental apparatus for photocatalytic reduction of carbon dioxide according to the present invention includes:
the device supporting frame comprises a frame body 1 and a suspension 12, wherein the suspension 12 is arranged at the top of the frame body 1 and used for mounting an illumination device;
the illumination device is suspended on the suspension 12 and comprises a shell 2, a reflector 4, a Fresnel lens 7, a light source 5 and a power supply 6, wherein the shell 2 is suspended at the end part of the suspension 12, which exceeds the frame body 11, and the bottom of the shell 2 is provided with a light source installation cavity; the light source 5 is embedded in the light source installation cavity of the shell 2, and a light outlet of the light source 5 is kept aligned with the catalytic reaction device right below; the reflector 4 covers the wall surface of the light source installation cavity and surrounds the light source 5; the Fresnel lens 7 is arranged right below a light outlet of the light source 5 and is used for converging light rays emitted by the light source 5 into light spots to irradiate the light spots into the catalytic reaction device; the power supply is arranged at the top of the frame body 1, and the power supply end of the power supply 6 is electrically connected with the power supply end of the light source 5 through an electric wire 18 and is used for supplying power to the light source 5;
the catalytic reaction device is arranged right below the Fresnel lens 7 and comprises a temperature-controlled reactor 14, a control box and a stirring mechanism, and a catalyst support is arranged in a reaction cavity of the temperature-controlled reactor and used for supporting a flaky catalyst; the top of the temperature-controlled reactor is provided with an irradiation window for transmitting light spots, and the side wall of the temperature-controlled reactor is provided with a feed inlet, a discharge outlet and a temperature-controlled liquid injection port;
the control box comprises a box body 26 and is used for regulating the introduction of CO2A pressure gas passage 27, a liquid passage 28 for introducing liquid materials into the control box, a main controller 29 for controlling the feeding of the catalytic reaction device and a power supply 39 for supplying power, wherein the total gas outlet of the gas passage 27 is communicated with a feed inlet pipeline of the temperature-controlled reactor, and a gas pressure increasing valve 10 and a gas pressure reducing valve 9 are assembled at the total gas inlet of the gas passage to regulate the introduction of CO2The pressure of (a); a pressure stabilizing valve 13 is arranged on the feed pipeline between the total gas outlet of the gas passage 27 and the feed inlet of the temperature-controlled reactor and is used for adjusting and stabilizing the gas pressure in the reactor; a gas passage communicated with a discharge hole of the temperature control type reactor is sequentially provided with a back pressure valve 15 and a stop valve 20, and the generated product gas is controlled to be introduced into an FID detector; a check valve 19 is assembled at the liquid inlet of the liquid passage 28, and the liquid outlet of the liquid passage 28 is communicated with a pipeline of the feed inlet of the temperature-controlled reactor; the power supply end of the power supply 39 is electrically connected with the power supply end of the main controller 29;
the feeding device comprises a gas supply device 23 and a liquid supply device 30, and a gas supply port of the gas supply device is communicated with a main gas inlet pipeline of the gas passage and is used for inputting gas into the reactor; the liquid supply device 30 is arranged in the box body 26 and is communicated with a feed inlet pipeline of the temperature-controlled reactor through a liquid passage 28.
The gas passage 27 comprises a main gas passage 17, a first gas measurement branch passage 31 and a second gas measurement branch passage 32, the main gas passage 17 penetrates through the box body 26, the gas inlet of the main gas passage 17 is communicated with the gas supply device 23 of the feeding device, and the gas outlet of the main gas passage 17 is communicated with the feed inlet pipeline of the temperature-controlled reactor; the first gas measuring branch passage 31 and the second gas measuring branch passage 32 are both communicated with the main gas passage 17 and are sequentially arranged from front to back along the flow direction of gas in the main gas passage 17, wherein the gas outlet of the first gas measuring branch passage 31 is provided with a booster pump 33, a gas pressure reducing valve 9 is arranged on a pipeline between the gas outlet of the first gas measuring branch passage 31 and the gas inlet of the booster pump 33, and a pressure gauge 8 is arranged at the gas detection port of the booster pump 33 and is used for detecting the gas pressure in the first gas measuring branch passage; a vacuum pump 34 is arranged at the gas outlet of the second gas measurement branch passage 32, a pipeline between the gas outlet of the second gas measurement branch passage 32 and the gas inlet of the vacuum pump 34 is provided with a gas booster valve 10 and an inlet pressure sensor 35 which are sequentially connected in series, and the control end of the vacuum pump 34 is electrically connected with the pressure detection port of the main controller 29; a pressure detection port and a temperature detection port are arranged on the main gas passage between the gas outlet of the main gas passage 17 and the second gas measurement branch passage 32, and the pressure detection port is provided with a reactor internal pressure gauge 11 and an outlet pressure sensor 36; a temperature sensor 40 is assembled at the temperature detection port, and the signal output end of the temperature sensor 40 is electrically connected with the signal input end of the main controller 29; the liquid supply device 30 is a water storage tank arranged in the tank body 26, a water through hole of the water storage tank is communicated with a feed inlet pipeline of the temperature control type reactor through a motor 37 and a liquid pipeline of a liquid passage 28, and a one-way valve 19 is arranged on the communicated pipeline.
The control box also comprises a control panel 38, the control panel is embedded on the surface of the box body, a display screen 381 and a control key 382 are arranged on the control panel, and a signal transmission control end of the display screen is electrically connected with a signal control end of the main controller and is used for displaying necessary parameters while adjusting the gas pressure and temperature in the reaction cavity.
The temperature control type reactor comprises a reactor body 14 with a reaction cavity and a heating device 24, wherein the reactor body 14 is arranged under the Fresnel lens 7, the reactor body 14 is a stainless steel reactor which is provided with a plurality of inlet and outlet channels and has a heat preservation function, the top of the reactor body is provided with an irradiation window for light spots to pass through, one side wall of the reactor body 14 is provided with a liquid inlet and a liquid inlet, the opposite side wall is provided with a liquid outlet, and the liquid inlet is provided with a temperature control type water injector 22 for injecting liquid into the reaction cavity of the reactor body 14; the heating device 24 comprises a heater and a temperature controller, wherein the heater is arranged on the outer end face of the reactor and is used for heating the feed liquid in the reactor body into gas; and the control end of the temperature controller is electrically connected with the control end of the heater and is used for controlling the temperature of the feed liquid in the reactor.
The bottom of the temperature control reactor is provided with a stirring device, the stirring device comprises a lifting support bearing 25 and a magnetic stirrer 16, the magnetic stirrer 16 is placed on the top of the lifting support bearing 25, and the light concentration ratio is adjusted by adjusting the distance between the reactor body 14 and the Fresnel lens 7; the temperature-controlled reactor is placed on top of the magnetic stirrer 16.
A mass flow meter 21 for measuring the gas flow in the pipeline and a mass flow controller for controlling the mass flow meter are assembled on the pipeline between the gas supply device 23 and the control box; the pressure stabilizing valve 13, the back pressure valve 15, the check valve 19, the stop valve 20, the mass flowmeter 21 and the mass flow controller control the whole gas flow path and are used for controlling the gas materials to enter and exit; the check valve 19, the stop valve 20 and the corresponding pipelines form a complete liquid flow path for controlling the liquid material to enter and exit.
The photocatalytic reduction of CO2The experimental system device also comprises a heat dissipation device 3, wherein the heat dissipation device 3 is suspended at the end part of the suspension bracket 12, which exceeds the bracket body, and is positioned right above the illumination device; the heat dissipation device 3 comprises a heat dissipation fan and a power supply, and an air outlet of the heat dissipation fan is aligned to an air inlet at the top of the shell and used for dissipating heat of the illumination device; and the power supply end of the cooling fan is electrically connected with the power transmission end of the power supply.
The light source 5 is a xenon lamp of 1000W-5000W, and the distance between the light source 5 and the Fresnel lens is 30 cm.
The observation window on the reactor body 14 is made of transparent high-temperature-resistant quartz, the gas temperature and pressure in the reaction cavity are all displayed on the control panel, and the outlet of the main gas passage 17 is connected with a gas chromatograph.
The support frame, the shell is made of stainless steel material.
The operation process is as follows: before the device is used, the air tightness of the device needs to be checked, and the gas feed liquid is CO2The liquid feed liquid is water; under safe conditions, the water is heated and supplied with CO at a flow rate2The gas brings the water vapor generated after heating into the reaction cavity of the reactor body 14 for reaction. Water gas and CO under conditions of light concentration and catalyst catalysis on a catalyst support2Reacting the gas with CO2Reducing into a target product. The temperature and pressure in the reaction process can be controlled by a control panel, the gas discharged from the main gas passage 17 passes through a gas chromatograph to be used for analyzing gas components, and after all the temperature and pressure are adjusted, formal production can be carried out, and target products are collected.
The embodiments described in this specification are merely illustrative of implementations of the inventive concept and the scope of the present invention should not be considered limited to the specific forms set forth in the embodiments but includes equivalent technical means as would be recognized by those skilled in the art based on the inventive concept.
Claims (8)
1. The utility model provides a light catalytic reduction carbon dioxide experimental apparatus which characterized in that includes:
the support frame comprises a frame body and a suspension, and the suspension is arranged at the top of the frame body and used for mounting the illumination device;
the illumination device is suspended on the suspension and comprises a shell, a reflector, a Fresnel lens, a light source and a power supply, the shell is suspended at the end part of the suspension, which exceeds the frame body, and the bottom of the shell is provided with a light source installation cavity; the light source is embedded in the light source installation cavity of the shell, and a light outlet of the light source is kept aligned with the catalytic reaction device right below; the reflector covers the wall surface of the light source installation cavity and surrounds the light source; the Fresnel lens is arranged right below a light outlet of the xenon lamp light source and is used for converging light rays emitted by the light source into light spots to irradiate the light spots into the catalytic reaction device; the power supply is arranged at the top of the frame body, and the power supply end of the power supply is electrically connected with the power supply end of the light source through an electric wire and used for supplying power to the light source;
the catalytic reaction device is arranged right below the Fresnel lens and comprises a temperature-controlled reactor, a control box and a stirring mechanism, a catalyst support for fixing a catalyst is arranged in a reaction cavity of the temperature-controlled reactor, an irradiation window for transmitting light spots is arranged at the top of the temperature-controlled reactor, and a feed inlet, a discharge outlet and a temperature-controlled liquid injection port are formed in the side wall of the temperature-controlled reactor; the control box comprises a box body and is used for regulating and introducing CO2The main gas outlet of the gas passage is communicated with a feed inlet pipeline of the temperature control reactor, and a gas pressure increasing valve and a gas pressure reducing valve are matched at the main gas inlet of the gas passage to regulate the introduction of CO2The pressure of (a); a pressure stabilizing valve is arranged on the feeding pipeline between the total gas outlet of the gas passage and the feed inlet of the temperature control reactor and is used for adjusting and stabilizing the gas pressure in the reactor; a discharge pipe communicated with a discharge hole of the temperature control type reactor is sequentially provided with a back pressure valve and a stop valve, and the generated product gas is controlled to be introduced into an FID detector; a one-way valve is assembled at a liquid inlet of the liquid passage, and a liquid outlet of the liquid passage is communicated with a pipeline of a feed inlet of the temperature-controlled reactor; the power supply end of the power supply is electrically connected with the power supply end of the main controller;
the gas supply port of the gas supply device is communicated with the main gas inlet pipeline of the gas passage and is used for inputting gas into the reactor; the liquid supply device is arranged in the box body and is communicated with a feed inlet pipeline of the temperature control type reactor through a liquid passage.
2. The experimental device for photocatalytic reduction of carbon dioxide as set forth in claim 1, characterized in that: the gas passage comprises a main gas passage, a first gas measurement branch passage and a second gas measurement branch passage, the main gas passage penetrates through the box body, a gas inlet of the main gas passage is communicated with a gas supply device of the feeding device, and a gas outlet of the main gas passage is communicated with a feed inlet pipeline of the temperature-controlled reactor; the first gas measurement branch passage and the second gas measurement branch passage are communicated with the main passage and are sequentially arranged from front to back along the gas flowing direction in the main gas passage, wherein a booster pump is assembled at a gas outlet of the first gas measurement branch passage, a gas pressure reducing valve is arranged on a pipeline between the gas outlet of the first gas measurement branch passage and a gas inlet of the booster pump, and a pressure gauge is assembled at a gas detection port of the booster pump and is used for detecting the gas pressure in the first gas measurement branch passage; a vacuum pump is assembled at the gas outlet of the second gas measurement branch passage, a pipeline between the gas outlet of the second gas measurement branch passage and the gas inlet of the vacuum pump is provided with a gas booster valve and an inlet pressure sensor which are sequentially connected in series, and the control end of the vacuum pump is electrically connected with the pressure detection port of the main controller; a pressure detection port and a temperature detection port are arranged on the main gas passage between the gas outlet of the main gas passage and the second gas measurement branch passage, and the pressure detection port is provided with a reactor internal pressure gauge and a second pressure sensor; a temperature sensor is assembled at the temperature detection port, and the signal output end of the temperature sensor is electrically connected with the signal input end of the main controller; the water storage tank is arranged in the inner cavity of the tank body, a water through hole of the water storage tank is communicated with a feed inlet pipeline of the temperature control type reactor through a motor and a pipeline, and a one-way valve is arranged on the pipeline communicated with the water through hole.
3. The experimental device for photocatalytic reduction of carbon dioxide as set forth in claim 2, wherein: the control box further comprises a control panel, the control panel is embedded in the surface of the box body, a display screen and control keys are arranged on the control panel, and a signal transmission control end of the display screen is electrically connected with a signal control end of the main controller.
4. The experimental device for photocatalytic reduction of carbon dioxide as set forth in claim 1, characterized in that: the temperature-controlled reactor comprises a reactor body with a reaction cavity and a heating device, the reactor body is arranged under the Fresnel lens, the top of the reactor body is provided with an irradiation window, one side wall of the reactor body is provided with a liquid inlet and a liquid inlet, the opposite side wall is provided with a discharge hole, and the liquid inlet is provided with a temperature-controlled water injector for injecting liquid into the reaction cavity of the reactor body; the heating device comprises a heater and a temperature controller, wherein the heater is arranged on the outer end face of the reactor and is used for heating the material liquid in the reactor body; and the control end of the temperature controller is electrically connected with the control end of the heater and is used for controlling the temperature of the feed liquid in the reactor.
5. The experimental device for photocatalytic reduction of carbon dioxide as set forth in claim 4, wherein: a stirring device is arranged at the bottom of the temperature control type reactor and comprises a lifting support bearing and a magnetic stirrer, and the magnetic stirrer is placed at the top of the lifting support bearing; the temperature control type reactor is arranged at the top of the magnetic stirrer.
6. The experimental device for photocatalytic reduction of carbon dioxide as set forth in claim 5, wherein: and a mass flow meter for measuring the gas flow in the pipeline and a mass flow controller for controlling the mass flow meter are assembled on the pipeline between the feeding device and the control box.
7. The experimental device for photocatalytic reduction of carbon dioxide as set forth in claim 1, characterized in that: the photocatalytic reduction of CO2The experimental system device also comprises a heat dissipation device, wherein the heat dissipation device is suspended at the end part of the suspension frame, which exceeds the frame body, and is positioned right above the illumination device; the heat dissipation device comprises a heat dissipation fan and a power supply, and an air outlet of the heat dissipation fan is aligned to an air inlet at the top of the shell and used for dissipating heat of the illumination device; and the power supply end of the cooling fan is electrically connected with the power transmission end of the power supply.
8. The experimental device for photocatalytic reduction of carbon dioxide as set forth in claim 1, characterized in that: the light source is a xenon lamp of 1000W-5000W, and the distance between the light source and the Fresnel lens is 10-40 cm.
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