CN109675428A - A kind of SiO2The preparation method and applications of@CuO Core-shell structure material - Google Patents
A kind of SiO2The preparation method and applications of@CuO Core-shell structure material Download PDFInfo
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- CN109675428A CN109675428A CN201811571886.XA CN201811571886A CN109675428A CN 109675428 A CN109675428 A CN 109675428A CN 201811571886 A CN201811571886 A CN 201811571886A CN 109675428 A CN109675428 A CN 109675428A
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- 239000000463 material Substances 0.000 title claims abstract description 35
- 239000011258 core-shell material Substances 0.000 title claims abstract description 34
- 238000002360 preparation method Methods 0.000 title claims abstract description 17
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 36
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 30
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 30
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 30
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 30
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 30
- 239000000725 suspension Substances 0.000 claims abstract description 25
- 239000003546 flue gas Substances 0.000 claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 239000006185 dispersion Substances 0.000 claims abstract description 14
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 230000032683 aging Effects 0.000 claims abstract description 6
- 239000008367 deionised water Substances 0.000 claims abstract description 6
- 229910021641 deionized water Inorganic materials 0.000 claims abstract description 6
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 claims abstract description 6
- 238000013019 agitation Methods 0.000 claims abstract 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 10
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 235000019441 ethanol Nutrition 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 2
- 239000013049 sediment Substances 0.000 claims description 2
- LELOWRISYMNNSU-UHFFFAOYSA-N hydrogen cyanide Chemical compound N#C LELOWRISYMNNSU-UHFFFAOYSA-N 0.000 abstract description 40
- 229910000070 arsenic hydride Inorganic materials 0.000 abstract description 21
- 239000007789 gas Substances 0.000 abstract description 12
- RBFQJDQYXXHULB-UHFFFAOYSA-N arsane Chemical compound [AsH3] RBFQJDQYXXHULB-UHFFFAOYSA-N 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 3
- 239000002440 industrial waste Substances 0.000 abstract description 3
- 238000005119 centrifugation Methods 0.000 abstract 1
- 238000001914 filtration Methods 0.000 abstract 1
- 239000008236 heating water Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 20
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- 238000007605 air drying Methods 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 4
- 238000007664 blowing Methods 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 238000005485 electric heating Methods 0.000 description 4
- 238000000227 grinding Methods 0.000 description 4
- 239000001301 oxygen Substances 0.000 description 4
- 229910052760 oxygen Inorganic materials 0.000 description 4
- 239000010453 quartz Substances 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000003760 magnetic stirring Methods 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 230000001376 precipitating effect Effects 0.000 description 3
- 210000000952 spleen Anatomy 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- 229910052785 arsenic Inorganic materials 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 238000009841 combustion method Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 231100000572 poisoning Toxicity 0.000 description 2
- 230000000607 poisoning effect Effects 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 210000002345 respiratory system Anatomy 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 231100000167 toxic agent Toxicity 0.000 description 2
- 239000003440 toxic substance Substances 0.000 description 2
- 244000144725 Amygdalus communis Species 0.000 description 1
- 239000005997 Calcium carbide Substances 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical class S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 241001597008 Nomeidae Species 0.000 description 1
- 235000003893 Prunus dulcis var amara Nutrition 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- BTGRAWJCKBQKAO-UHFFFAOYSA-N adiponitrile Chemical compound N#CCCCCC#N BTGRAWJCKBQKAO-UHFFFAOYSA-N 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical group [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 150000001495 arsenic compounds Chemical class 0.000 description 1
- 210000000621 bronchi Anatomy 0.000 description 1
- 201000011510 cancer Diseases 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 229910001902 chlorine oxide Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 230000002949 hemolytic effect Effects 0.000 description 1
- 231100000086 high toxicity Toxicity 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000002779 inactivation Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 210000003734 kidney Anatomy 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 210000004072 lung Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 238000009279 wet oxidation reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/81—Solid phase processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/602—Oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/408—Cyanides, e.g. hydrogen cyanide (HCH)
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/55—Compounds of silicon, phosphorus, germanium or arsenic
- B01D2257/553—Compounds comprising hydrogen, e.g. silanes
Abstract
The present invention discloses a kind of SiO2The preparation method and applications of@CuO Core-shell structure material, are mixed to get dispersion liquid for sodium orthophosphate and deionized water；By Nano-meter SiO_22It is respectively put into dispersion liquid with CuO, obtains SiO2Suspension and CuO suspension；By SiO2Suspension and CuO suspension mix, and after adjusting pH value, after heating water bath and magnetic agitation, still aging, filtering centrifugation, washs, is dry, obtain SiO2@CuO Core-shell structure material；Core-shell structure material is used for while removing the arsenic hydride in flue gas and hydrogen cyanide, makes arsenic hydride in industrial waste gas and hydrogen cyanide well below national emission standard；Preparation method of the present invention is easy to operate, at low cost, and obtained Core-shell structure material can be widely used for removing while arsenic hydride and hydrogen cyanide in all kinds of gas sources, has apparent social and economic effects.
Description
Technical field
The invention belongs to industrial waste gas process fields, and in particular to a kind of SiO2The preparation method of@CuO Core-shell structure material and
It is applied.
Background technique
Arsenic hydride is also known as arsine, is simplest arsenic compound, chemical formula AsH3, flammable, energy spontaneous combustion.It is arsenic and hydrogen
High toxicity molecule derivant.Hydrogen cyanide (HCN) is that one kind is colourless, there is the extremely toxic substance of slight bitter almond odor.AsH3And HCN
It exists simultaneously in coke oven tail gas, the yellow burning for sympathizing with tail gas, closed calcium carbide furnace tail gas, fossil fuel, the every field such as one chemical industry of carbon
Industrial waste gas in.The reproducibilities such as As, CN gaseous impurities can make catalyst poisoning, so as to cause catalyst inactivation or failure；
In the presence of under wet heat condition or aerobic, AsH3This sour gas is easily absorbing the table in metal or metal oxide
Face can generate slow and long-term corrosion to pipe-line equipment and measuring instrument, this can not only bring seriously to industrial production itself
Economic loss, and also improve the investment of equipment and the cost of product；AsH3Toxicity be about lewis acidic seven times,
It and is strong hemolytic toxicant.It is chronically exposed to AsH3In have a significant impact to human health, for example lung can be made, respiratory tract,
Bronchus, kidney is badly damaged, can also cause the high risks illness such as cancer, even result in death.The concentration of cyanide in air
Height is different also different to the harm of human body, and when volume fraction reaches in air, human body will be choked to death rapidly.Lower
It can cause slightly to be poisoned under concentration, mechanism of poisoning is similar to carbon monoxide.It can not only be entered in human body by respiratory tract, moreover it is possible to logical
It crosses the channels such as skin contact, feed and enters human body.
It there is no the AsH that research is directed at present3It is removed simultaneously with HCN, for AsH3Removal methods mainly inhaled with wet oxidation
Based on receipts, in the patent of Publication No. CN102389697A, a kind of describe wet cleaning arsenic hydride method.This method uses
Chlorine and sodium hydroxide are that raw material prepares fresh liquor natrii hypochloritis, are had great advantages in cost, but this method needs
Unstrpped gas chlorine sheet to be used is high to transport and storage request as toxic gas, and severe corrosion to equipment, in addition
The liquor natrii hypochloritis of preparation needs to keep fresh, increases storage equipment.Traditional HCN removing sulfuldioxide can be divided into wet process and do
Method two major classes.Wet process is described several based on absorption process in the patent of Publication No. CN8610427A and CN101730574A
The method that HCN is removed using lye is described using organic reagent and HCN shape in the patent of Publication No. CN102149638A
At the method for HCN in covalent bond removal adiponitrile.Although these method and technologies are mature, it is widely used, all unavoidable expense
Higher, secondary pollution problems.Dry method includes absorption method and combustion method etc., and absorption method is more thorough to HCN removing, and passes through
Regeneration can be recycled, but adsorbing medium adsorbance is limited, and frequent regeneration is needed to replace.Combustion method is in production practices
Tail gas developed mostly from the characteristics of pyroprocess, preheating temperature height and nitrogen oxides limit pushing away for this technology
Extensively.
Summary of the invention
The purpose of the present invention is to provide a kind of SiO2The preparation method of@CuO Core-shell structure material, specifically includes following step
It is rapid:
(1) ratio for being 1-5:100 according to the volume ratio of sodium orthophosphate and deionized water, the two is mixed；
(2) by Nano-meter SiO_22It is respectively put into dispersion liquid with nanometer CuO, ultrasonic disperse respectively obtains SiO2Suspension and CuO are outstanding
Turbid；
(3) SiO2Suspension and the mixing of CuO suspension, and continue to stir 5-10min, after being sufficiently mixed the two, then slowly
After the pH value for adjusting mixed liquor is 2-7, mixed liquor is placed in water-bath to the temperature for heating and controlling entire reaction system, in magnetic
Power stirring is lower to react 60-80min；
(4) it by the still aging 24-30h of mixed liquor of step (3), then filters, be centrifuged, water and ethyl alcohol are respectively washed 3-5 times, finally will
Sediment obtains SiO in 70 DEG C -90 DEG C of electric heating constant-temperature blowing drying box forced air drying 24-30h2@CuO Core-shell structure material.
Step (2) SiO2It is mixed with dispersion liquid according to the ratio that mass volume ratio g:mL is 1-5:100.
Step (2) CuO and dispersion liquid are mixed according to the ratio that mass volume ratio g:mL is 1-5:100.
Step (3) SiO2Suspension and CuO suspension are according to SiO2The ratio that mass ratio with CuO is 1:5-10 mixes.
Step (3) heating temperature is 60-80 DEG C.
Step (3) uses concentration to adjust pH value for the dilute sulfuric acid of 0.2mol/L.
The present invention also provides the SiO being prepared2@CuO Core-shell structure material removes the AsH in flue gas at the same time3And HCN
In application, particularly by SiO obtained2It is sized to 40-60 mesh after the tabletting of@CuO Core-shell structure material, grinding, is put into solid
In fixed bed quartz reactor, oxygen purity be 0.5%-1%, relative humidity 12.5%-49%, air speed 5000-
20000h-1, under conditions of reaction temperature is 100-200 DEG C, while removing AsH in flue gas3And HCN.
The present invention has the advantage that compared with prior art or good effect:
SiO of the present invention2@CuO Core-shell structure material preparation method is simple, while AsH in efficient removal flue gas3And HCN, react item
Part is more mild, simple to the subtractive process of pollutant, and cost is relatively low.
Detailed description of the invention
Fig. 1 is to remove AsH in the embodiment of the present invention 1 simultaneously3With the efficiencies schematic diagram of HCN；
Fig. 2 is to remove AsH in the embodiment of the present invention 2 simultaneously3With the efficiencies schematic diagram of HCN；
Fig. 3 is to remove AsH in the embodiment of the present invention 3 simultaneously3With the efficiencies schematic diagram of HCN.
Specific embodiment
The present invention is described in further details with reference to the accompanying drawings and examples, but protection scope of the present invention and unlimited
In described interior.
Embodiment 1
A kind of SiO2The preparation method of@CuO Core-shell structure material, specifically includes the following steps:
(1) ratio for being 1:100 according to the volume ratio of sodium orthophosphate and deionized water, the two is mixed；
(2) by Nano-meter SiO_22It is mixed with dispersion liquid according to the ratio that mass volume ratio g:mL is 1:100, ultrasonic disperse obtains
SiO2Suspension；Nanometer CuO and dispersion liquid are mixed according to the ratio that mass volume ratio g:mL is 1:100, ultrasonic disperse obtains
CuO suspension；
(3) SiO2Suspension and CuO suspension are according to SiO2The ratio that mass ratio with CuO is 1:5 mixes, and continues to stir
5-10min, after being sufficiently mixed the two, then the pH value for using concentration slowly to adjust mixed liquor for the dilute sulfuric acid of 0.2mol/L is 2
Afterwards, mixed liquor is placed in water-bath to the temperature for being heated to 60 DEG C and controlling entire reaction system, is reacted under magnetic stirring
60min；
(4) mixed liquor of step (3) is still aging for 24 hours, it then filters, be centrifuged, water and ethyl alcohol are respectively washed 3 times, finally will precipitating
Object 70 DEG C electric heating constant-temperature blowing drying box forced air drying for 24 hours, obtain SiO2@CuO Core-shell structure material.
The SiO that the present embodiment is prepared2@CuO Core-shell structure material removes the AsH in flue gas at the same time3In HCN
Using particularly by SiO obtained2Be sized to after the tabletting of@CuO Core-shell structure material, grinding 40-60 mesh (under 40 meshes, 60
In mesh, in full together), it is put into fixed-bed quartz reactor, is passed through simulated flue gas into fixed bed reactors, in simulated flue gas
Oxygen purity is 0.5%, AsH3Concentration 100ppm, HCN concentration is 100ppm, relative humidity 12.5%, is in air speed
5000h-1, under conditions of reaction temperature is 100 DEG C, while removing AsH in flue gas3And HCN, it works off one's feeling vent one's spleen through Mass Spectrometer Method AsH3
With HCN content, AsH3Fig. 1 is seen with the removal efficiency of HCN, as can be known from Fig. 1, SiO obtained by the present embodiment2@CuO nucleocapsid knot
Structure material is to AsH3150min and 270min are maintained respectively with 100% removal efficiency of HCN, and two kinds of gas is de- in 270min
Except efficiency is kept at 80% or more.
Embodiment 2
A kind of SiO2The preparation method of@CuO Core-shell structure material, specifically includes the following steps:
(1) ratio for being 2:100 according to the volume ratio of sodium orthophosphate and deionized water, the two is mixed；
(2) by Nano-meter SiO_22It is mixed with dispersion liquid according to the ratio that mass volume ratio g:mL is 3:100, ultrasonic disperse obtains
SiO2Suspension；Nanometer CuO and dispersion liquid are mixed according to the ratio that mass volume ratio g:mL is 3:100, ultrasonic disperse obtains
CuO suspension；
(3) SiO2Suspension and CuO suspension are according to SiO2The ratio that mass ratio with CuO is 1:8 mixes, and continues to stir
After 8min both makes after being sufficiently mixed, then the pH value for using concentration slowly to adjust mixed liquor for the dilute sulfuric acid of 0.2mol/L is 5,
Mixed liquor is placed in water-bath to the temperature for being heated to 70 DEG C and controlling entire reaction system, reacts 70min under magnetic stirring；
(4) it by the still aging 25h of mixed liquor of step (3), then filters, be centrifuged, water and ethyl alcohol are respectively washed 4 times, finally will precipitating
Object obtains SiO in 80 DEG C of electric heating constant-temperature blowing drying box forced air drying 25h2@CuO Core-shell structure material.
The SiO that the present embodiment is prepared2@CuO Core-shell structure material removes the AsH in flue gas at the same time3In HCN
Using particularly by SiO obtained2It is sized to 40-60 mesh after the tabletting of@CuO Core-shell structure material, grinding, is put into fixed bed
In quartz reactor, simulated flue gas is passed through into fixed bed reactors, oxygen purity is 0.8%, AsH in simulated flue gas3It is dense
Spend 150ppm, HCN concentration be 150ppm, relative humidity 25%, air speed be 10000h-1, reaction temperature be 150 DEG C of condition
Under, while removing AsH in flue gas3And HCN, it works off one's feeling vent one's spleen through Mass Spectrometer Method AsH3With HCN content, AsH3With the removal efficiency of HCN
See Fig. 2, as can be known from Fig. 2, SiO obtained by the present embodiment2@CuO Core-shell structure material is to AsH3With the 100% removing effect of HCN
Rate maintains 60min and 180min respectively, and the removal efficiency of two kinds of gases is kept at 80% or more in 180min.
Embodiment 3
A kind of SiO2The preparation method of@CuO Core-shell structure material, specifically includes the following steps:
(1) ratio for being 5:100 according to the volume ratio of sodium orthophosphate and deionized water, the two is mixed；
(2) by Nano-meter SiO_22It is mixed with dispersion liquid according to the ratio that mass volume ratio g:mL is 5:100, ultrasonic disperse obtains
SiO2Suspension；Nanometer CuO and dispersion liquid are mixed according to the ratio that mass volume ratio g:mL is 5:100, ultrasonic disperse obtains
CuO suspension；
(3) SiO2Suspension and CuO suspension are according to SiO2The ratio that mass ratio with CuO is 1:10 mixes, and continues to stir
10min is mixed, after being sufficiently mixed the two, then the pH value for using concentration slowly to adjust mixed liquor for the dilute sulfuric acid of 0.2mol/L is 7
Afterwards, mixed liquor is placed in water-bath to the temperature for being heated to 80 DEG C and controlling entire reaction system, is reacted under magnetic stirring
80min；
(4) it by the still aging 30h of mixed liquor of step (3), then filters, be centrifuged, water and ethyl alcohol are respectively washed 5 times, finally will precipitating
Object obtains SiO in 90 DEG C of electric heating constant-temperature blowing drying box forced air drying 30h2@CuO Core-shell structure material.
The SiO that the present embodiment is prepared2@CuO Core-shell structure material removes the AsH in flue gas at the same time3In HCN
Using particularly by SiO obtained2It is sized to 40-60 mesh after the tabletting of@CuO Core-shell structure material, grinding, is put into fixed bed
In quartz reactor, simulated flue gas is passed through into fixed bed reactors, oxygen purity is 1%, AsH in simulated flue gas3Concentration
200ppm, HCN concentration is 200ppm, relative humidity 49%, is 20000h in air speed-1, reaction temperature be 200 DEG C under conditions of,
AsH in flue gas is removed simultaneously3And HCN, it works off one's feeling vent one's spleen through Mass Spectrometer Method AsH3With HCN content, AsH3See with the removal efficiency of HCN
Fig. 3, as can be known from Fig. 3, SiO obtained by the present embodiment2@CuO Core-shell structure material is to AsH3With 100% removal efficiency of HCN
30min and 120min are maintained respectively, and the removal efficiency of two kinds of gases is kept at 80% or more in 180min.
Claims (7)
1. a kind of SiO2The preparation method of@CuO Core-shell structure material, which is characterized in that specifically includes the following steps:
(1) ratio for being 1-5:100 according to the volume ratio of sodium orthophosphate and deionized water, the two is mixed；
(2) by Nano-meter SiO_22It is respectively put into dispersion liquid with nanometer CuO, ultrasonic disperse respectively obtains SiO2Suspension and CuO are outstanding
Turbid；
(3) by SiO25-10min is stirred after suspension and the mixing of CuO suspension, after the pH value for adjusting mixed liquor is 2-7, will be mixed
Liquid heating and magnetic agitation reaction 60-80min；
(4) it by the still aging 24-30h of mixed liquor of step (3), then filters, be centrifuged, water and ethyl alcohol are respectively washed 3-5 times, finally will
Sediment obtains SiO in 70 DEG C -90 DEG C dry 24-30h2@CuO Core-shell structure material.
2. SiO according to claim 12The preparation method of@CuO Core-shell structure material, which is characterized in that step (2) SiO2With
Dispersion liquid is mixed according to the ratio that mass volume ratio g:mL is 1-5:100.
3. SiO according to claim 12The preparation method of@CuO Core-shell structure material, which is characterized in that step (2) CuO and
Dispersion liquid is mixed according to the ratio that mass volume ratio g:mL is 1-5:100.
4. SiO according to claim 12The preparation method of@CuO Core-shell structure material, which is characterized in that step (3) SiO2It is outstanding
Turbid and CuO suspension are according to SiO2The ratio that mass ratio with CuO is 1:5-10 mixes.
5. SiO according to claim 12The preparation method of@CuO Core-shell structure material, which is characterized in that step (3) heating temperature
Degree is 60-80 DEG C.
6. SiO according to claim 12The preparation method of@CuO Core-shell structure material, which is characterized in that step (3) is using dense
The dilute sulfuric acid that degree is 0.2mol/L adjusts pH value.
7. SiO described in claim 12@CuO Core-shell structure material removes the AsH in flue gas at the same time3With the application in HCN.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811571886.XA CN109675428A (en) | 2018-12-21 | 2018-12-21 | A kind of SiO2The preparation method and applications of@CuO Core-shell structure material |
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