CN111715234A - Can simultaneously remove CO and SO2And NOxCatalyst of (2) - Google Patents
Can simultaneously remove CO and SO2And NOxCatalyst of (2) Download PDFInfo
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- CN111715234A CN111715234A CN202010721950.9A CN202010721950A CN111715234A CN 111715234 A CN111715234 A CN 111715234A CN 202010721950 A CN202010721950 A CN 202010721950A CN 111715234 A CN111715234 A CN 111715234A
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- 239000003054 catalyst Substances 0.000 claims abstract description 109
- 238000000034 method Methods 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000004927 clay Substances 0.000 claims abstract description 9
- 238000002360 preparation method Methods 0.000 claims abstract description 8
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims abstract description 5
- 229910017604 nitric acid Inorganic materials 0.000 claims abstract description 5
- 238000001035 drying Methods 0.000 claims description 19
- 239000004480 active ingredient Substances 0.000 claims description 15
- 239000007864 aqueous solution Substances 0.000 claims description 7
- 239000000919 ceramic Substances 0.000 claims description 7
- 238000002791 soaking Methods 0.000 claims description 7
- 239000006260 foam Substances 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000000243 solution Substances 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 4
- 230000032683 aging Effects 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 3
- 238000007602 hot air drying Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 235000013312 flour Nutrition 0.000 claims description 2
- 238000007603 infrared drying Methods 0.000 claims description 2
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 2
- 229910052622 kaolinite Inorganic materials 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 46
- 239000003546 flue gas Substances 0.000 abstract description 19
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 229910044991 metal oxide Inorganic materials 0.000 abstract description 4
- 150000004706 metal oxides Chemical class 0.000 abstract description 4
- 239000010881 fly ash Substances 0.000 abstract description 3
- 238000005470 impregnation Methods 0.000 abstract description 3
- 238000007254 oxidation reaction Methods 0.000 abstract description 3
- 230000020477 pH reduction Effects 0.000 abstract description 3
- 230000003647 oxidation Effects 0.000 abstract description 2
- 238000000746 purification Methods 0.000 abstract 1
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 47
- 229910002091 carbon monoxide Inorganic materials 0.000 description 30
- 230000000694 effects Effects 0.000 description 5
- 239000003245 coal Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 239000011572 manganese Substances 0.000 description 3
- 239000004579 marble Substances 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000002956 ash Substances 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- HSJPMRKMPBAUAU-UHFFFAOYSA-N cerium(3+);trinitrate Chemical compound [Ce+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O HSJPMRKMPBAUAU-UHFFFAOYSA-N 0.000 description 2
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- ORILYTVJVMAKLC-UHFFFAOYSA-N Adamantane Natural products C1C(C2)CC3CC1CC2C3 ORILYTVJVMAKLC-UHFFFAOYSA-N 0.000 description 1
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 1
- 239000005751 Copper oxide Substances 0.000 description 1
- 229910002089 NOx Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- LDHDYBLHTDLXRW-UHFFFAOYSA-N [Cu]=O.[Fe].[Ce].[Mn] Chemical compound [Cu]=O.[Fe].[Ce].[Mn] LDHDYBLHTDLXRW-UHFFFAOYSA-N 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 229910000431 copper oxide Inorganic materials 0.000 description 1
- 229910000365 copper sulfate Inorganic materials 0.000 description 1
- ARUVKPQLZAKDPS-UHFFFAOYSA-L copper(II) sulfate Chemical compound [Cu+2].[O-][S+2]([O-])([O-])[O-] ARUVKPQLZAKDPS-UHFFFAOYSA-L 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 235000003891 ferrous sulphate Nutrition 0.000 description 1
- 239000011790 ferrous sulphate Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 description 1
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 1
- 229940071125 manganese acetate Drugs 0.000 description 1
- UOGMEBQRZBEZQT-UHFFFAOYSA-L manganese(2+);diacetate Chemical compound [Mn+2].CC([O-])=O.CC([O-])=O UOGMEBQRZBEZQT-UHFFFAOYSA-L 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Classifications
-
- 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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/84—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/889—Manganese, technetium or rhenium
- B01J23/8892—Manganese
-
- 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
- B01D53/86—Catalytic processes
- B01D53/8637—Simultaneously removing sulfur oxides and nitrogen oxides
-
- 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
- B01D53/86—Catalytic processes
- B01D53/864—Removing carbon monoxide or hydrocarbons
-
- 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
- B01D53/86—Catalytic processes
- B01D53/8643—Removing mixtures of carbon monoxide or hydrocarbons and nitrogen oxides
- B01D53/8646—Simultaneous elimination of the components
- B01D53/865—Simultaneous elimination of the components characterised by a specific catalyst
-
- 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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
-
- 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
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/0009—Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst
- B01J37/0018—Addition of a binding agent or of material, later completely removed among others as result of heat treatment, leaching or washing,(e.g. forming of pores; protective layer, desintegrating by heat)
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/0201—Impregnation
- B01J37/0207—Pretreatment of the support
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- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/08—Heat treatment
- B01J37/082—Decomposition and pyrolysis
- B01J37/086—Decomposition of an organometallic compound, a metal complex or a metal salt of a carboxylic acid
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- B01J37/08—Heat treatment
- B01J37/082—Decomposition and pyrolysis
- B01J37/088—Decomposition of a metal salt
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- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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Abstract
The invention discloses a method for simultaneously removing CO and SO2And NOxAnd a process for preparing the same. The CO and the SO can be simultaneously removed2And NOxThe catalyst uses cheap clay and fly ash as catalyst carrier, and is prepared through pre-oxidation (acidification) with concentrated nitric acid, dissolving the active component of low-temp catalyst in water, and equivalent impregnation to make metal oxide adhere to the catalyst for removing CO and SO simultaneously2And NOxThe catalyst becomes a carrier for removing CO and SO in low-temperature flue gas purification2、NOxThe catalyst of (1). The invention can simultaneously remove CO and SO2And NOxThe catalyst has simple preparation process and low cost, and can realize CO removal and SO removal2And NOxThe method has the advantages of reducing the treatment cost and the treatment difficulty of enterprises and having great industrial application value.
Description
Technical Field
The invention relates to the field of catalysts and preparation thereof, in particular to a manganese cerium iron copper oxide-containing catalyst capable of removing CO and SO simultaneously2And NOxThe catalyst of (1).
Background
At present, China has great effect on pollution control in waste flue gas discharged by coal-fired boilers, but the problem of air pollution in local areas with the use of coal-fired boilers is still very serious. In such areas, carbon monoxide (CO) and sulfur dioxide (SO) are present in flue gases generated by boilers (kilns)2) And Nitrogen Oxides (NO)x) Are contaminants that are particularly classified as important controls. Since 70 years of the 20 th century, China successively controlled SO of coal-fired industrial kilns2The emission of NO and CO is strictly limited and the limitation is becoming more and more strict with the development of scientific and technical and economic construction and the increase of the importance of ecological environment protection.
During the combustion process of coal, most of combustible substances in the coal can be burnt out in a kiln, and the rest of non-combustible substances are mainly ash, and the non-combustible ash and gas are combined together to form a large amount of waste flue gas containing a large amount of SO2、NO、CO、CO2And hydrocarbons, which are the main sources of pollution to the atmosphere
At present, none of the prior art can remove CO and SO simultaneously2And NOxThe preparation of the catalyst and the report of the relevant technology. Therefore, the method can be prepared under the low-temperature (160-250 ℃) environment without using a reducing agent, and can remove CO and SO in the waste flue gas of the industrial boiler (kiln)2And NOxWill have great industrial application requirements.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a method for removing CO and SO simultaneously2And NOxThe catalyst mainly takes raw materials such as clay, fly ash and the like as carriers and metal oxide as active ingredients, and the prepared catalyst can realize CO removal and SO removal at the same time2And NOxThe technical effect of (1).
In order to solve the technical problems, the invention adopts the following technical scheme:
can simultaneously remove CO and SO2And NOxThe catalyst of (1), comprising a catalyst carrier on which a catalyst active ingredient is supported.
The catalyst carrier consists of the following components:
the catalyst active ingredients comprise the following components by weight of the catalyst carrier:
further, the CO and the SO can be simultaneously removed2And NOxThe catalyst contains oxides of Mn, Cu, Ce, Fe and other elements.
Further, the CO and the SO can be simultaneously removed2And NOxThe molar ratio of the catalyst element Mn to the element Ce is 4: 1.
further, the clay material is one or more of kaolinite clay, sericite clay and montmorillonite clay.
Further, the ignition loss agent is flour.
The invention also provides the method for simultaneously removing CO and SO2And NOxThe preparation method of the catalyst comprises the following steps:
(1) mixing the raw materials of the catalyst carrier according to a proportion, adding a proper amount of water, uniformly stirring the mixture into a mud shape in a concrete stirrer, and naturally aging the mud shape in a cool and dry place;
(2) molding or extruding the aged mud-like substance by a molding press or an extruder to obtain a catalyst green body;
(3) placing the green body in a shade drying place for naturally drying in the shade for 24h, drying with hot air at 200 ℃ for 2-4h, placing the dried catalyst green body in a muffle furnace, and roasting at 950 ℃ for 8h to obtain a multi-gap foam ceramic-based catalyst green body;
(4) immersing the porous foam ceramic-based catalyst blank into a nitric acid solution with the concentration of 35%, soaking for 2h, and naturally drying in the shade to obtain a catalyst carrier;
(5) weighing catalyst active ingredients according to a proportion, and dissolving the weighed catalyst active ingredients in water to prepare an aqueous solution containing the catalyst active ingredients;
(6) soaking a catalyst carrier into an aqueous solution containing a catalyst active component for 2-4h, taking out, and drying at 200 ℃ for 10-24 h;
(7) the dried catalyst carrier is placed in a muffle furnace and heated for 8 to 15 hours at the temperature of 800 to 950 ℃ to obtain the catalyst carrier which can simultaneously remove CO and SO2And NOxThe catalyst finished product of (1).
Further, the shape of the catalyst body in the step (2) is one or more of honeycomb shape, spherical shape and plate shape.
Further, the volume of the aqueous solution in the step (4) is calculated by the water absorption of the catalyst carrier.
Further, the drying method in the step (5) is one of hot air drying, infrared drying, microwave drying and natural drying.
Further, the heating temperature in the step (6) is 940-950 ℃.
Further, the heating temperature in the step (6) is 950 ℃.
Compared with the prior art, the invention has the beneficial technical effects that:
the invention can remove CO and SO simultaneously2And NOxThe catalyst takes cheap clay and fly ash as catalyst carriers. Active elements such as Mn, Ce, Cu and the like are added on a carrier of the catalyst, so that the catalyst can be catalyzedThe activating performance of microporous particles of the catalyst is greatly improved, more oxygen vacancies favorable for improving the catalytic performance are produced, and the CO and SO content is improved2，NOXCatalysis of the oxidation reaction. The specific surface area of the catalyst is greatly increased through the pre-oxidation (acidification) of concentrated nitric acid. The active ingredients of the low-temperature catalyst are dissolved by hydrochloric acid, and then the metal oxide is attached to the carrier of the low-temperature desulfurization and denitrification catalyst by an equivalent impregnation method to form the low-temperature desulfurization and denitrification catalyst. By controlling the heating temperature, the excellent oxygen storage of the active ingredients of the catalyst is ensured, and the phase change which is not beneficial to catalytic reaction and is formed by metal oxides in the active ingredients is avoided. The invention can simultaneously remove CO and SO2And NOxThe catalyst has simple preparation process and low cost, and can realize the removal of SO while desulfurizing2And NOxThe method has the advantages of reducing the treatment cost and the treatment difficulty of enterprises and having great industrial application value.
Detailed Description
The present invention is further illustrated by the following examples, but it should be understood that these examples are illustrative only and should not be construed as limiting the practice of the present invention.
Example 1
(1) Mixing 35 parts of montmorillonite clay, 25 parts of zeolite, 1.5 parts of ignition loss agent, 30 parts of diatomite, 2.5 parts of ferric oxide and 1 part of copper oxide according to a proportion, adding proper water, uniformly stirring into a mud shape, and naturally aging in a cool and dry place;
(2) the aged blank mud is subjected to compression molding or extrusion molding to obtain a required catalyst blank;
(3) naturally drying the green body in the shade for 24 hours, then placing the green body in a hot air drying furnace at the temperature of 200 ℃ for drying for 2 hours, and placing the dried catalyst green body in a muffle furnace at the temperature of 950 ℃ for 8 hours to obtain a multi-gap foam ceramic-based catalyst carrier;
(4) soaking the porous foam ceramic-based catalyst carrier in 35% nitric acid for acidification, wherein the soaking time is 2 hours;
(5) the active components of the catalyst are attached to the surface of the catalyst carrier by means of equivalent impregnation.
(6) Calculating the weight of the required solution and the weight of various catalyst active components according to the water absorption of the catalyst carrier, wherein the weight of manganese acetate, cerium nitrate, copper sulfate and ferrous sulfate is 9 wt%, 3 wt%, 2 wt% and 1 wt%, respectively, and dissolving the components in a proper amount of water to prepare an aqueous solution containing the catalyst carrier active components;
(7) soaking a catalyst carrier into an aqueous solution containing active ingredients of the catalyst carrier for 2 hours, taking out the catalyst carrier, and drying the catalyst carrier at 200 ℃ for 10 hours;
(8) the dried catalyst is placed in a muffle furnace at 950 ℃ for 8h to prepare the catalyst capable of simultaneously removing CO, SO2 and NOx, and the catalyst capable of simultaneously removing CO and SO prepared in the embodiment2And NOxThe catalyst is applied to the actual production of Luan coal chemical industry Limited in Adam of river Steel group, and respectively measures CO and SO in the flue gas treated by the catalyst and the flue gas not treated by the catalyst2And NOxAnd (6) detecting.
The CO removal prepared in the embodiment can simultaneously remove SO2And NOxThe catalyst is applied to the actual production of flue gas treatment of marble tile production line of inner Mongolia ceramics Limited company (Ordos), and CO and SO in the flue gas treated by the catalyst and the flue gas not treated by the catalyst are respectively measured2And NOxThe content is detected, and the detection result is as follows:
table 1 marble tile production line exhaust gas outlet test result
As can be seen from Table 1, the CO and SO in the boiler flue gas after being treated by the catalyst described in the present application2And NOxThe content is obviously reduced, SO2Removal rate ofThe removal rate of CO is nearly 100 percent, and the removal rate of NO is nearly 100 percentxThe removal rate of the catalyst also reaches 62 percent. After treatment, CO and SO in the flue gas2And NOxThe content is far lower than the emission standard, which shows that the catalyst has good removal effect.
The CO removal prepared in the embodiment can simultaneously remove SO2And NOxThe catalyst is applied to the actual detection of a Luan coal chemical industry Co. coke oven flue gas treatment module in Chengde city, and is used for respectively treating flue gas (a flue gas inlet) which is not treated by the catalyst and CO and NO in flue gas treatment (a flue gas outlet) by the catalystxThe content of (A) is detected, and the detection result is as follows:
table 2 marble tile production line exhaust gas outlet detection result
As can be seen from Table 2, the CO and NO in the boiler flue gas after being treated by the catalyst described in the present applicationxThe content is obviously reduced, and the removal rates of the two reach 68.6 percent and 52 percent respectively. After treatment, CO and NO in the flue gasxThe content is far lower than the emission standard, which shows that the catalyst has good removal effect.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (9)
1. Can simultaneously remove CO and SO2And NOxThe catalyst of (1), characterized by comprising a catalyst carrier on which a catalyst active ingredient is supported;
wherein the catalyst support comprises the following components:
the catalyst active ingredients comprise the following components by weight of the catalyst carrier:
2. the process of claim 1 for the simultaneous removal of CO and SO2And NOxThe catalyst is characterized in that the molar ratio of the catalyst element Mn to the element Ce is 4: 1.
3. the process of claim 1 for the simultaneous removal of CO and SO2And NOxThe catalyst is characterized in that the clay material is one or more of kaolinite clay, sericite clay and montmorillonite clay.
4. The process of claim 1 for the simultaneous removal of CO and SO2And NOxThe catalyst is characterized in that the ignition loss agent is flour.
5. The method of claims 1-5 for simultaneous removal of CO and SO2And NOxThe preparation method of the catalyst is characterized by comprising the following steps:
(1) mixing the raw materials of the catalyst carrier according to a proportion, adding a proper amount of water, uniformly stirring the mixture into a mud shape in a concrete stirrer, and naturally aging the mud shape in a cool and dry place;
(2) molding or extruding the aged mud-like substance by a molding press or an extruder to obtain a catalyst green body;
(3) placing the green body in a shade drying place for naturally drying in the shade for 24h, drying with hot air at 200 ℃ for 2-4h, placing the dried catalyst green body in a muffle furnace, and roasting at 950 ℃ for 8h to obtain a multi-gap foam ceramic-based catalyst green body;
(4) immersing the porous foam ceramic-based catalyst blank into a nitric acid solution with the concentration of 35%, soaking for 2h, and naturally drying in the shade to obtain a catalyst carrier;
(5) weighing catalyst active ingredients according to a proportion, and dissolving the weighed catalyst active ingredients in water to prepare an aqueous solution containing the catalyst active ingredients;
(6) soaking a catalyst carrier into an aqueous solution containing a catalyst active component for 2-4h, taking out, and drying at 200 ℃ for 10-24 h;
(7) the dried catalyst carrier is placed in a muffle furnace and heated for 8 to 15 hours at the temperature of 800 to 950 ℃ to obtain the catalyst carrier which can simultaneously remove CO and SO2And NOxThe catalyst finished product of (1).
6. The process of claim 6 for the simultaneous removal of CO and SO2And NOxThe method for preparing a catalyst according to (4), wherein the volume of water in the step (4) is equal to the amount of adsorbed catalyst carrier.
7. The process of claim 6 for the simultaneous removal of CO and SO2And NOxThe preparation method of the catalyst is characterized in that the drying method in the step (5) is one of hot air drying, infrared drying, microwave drying and natural drying.
8. The process of claim 6 for the simultaneous removal of CO and SO2And NOxThe preparation method of the catalyst is characterized in that the heating temperature in the step (6) is 940-950 ℃.
9. The process of claim 6 for the simultaneous removal of CO and SO2And NOxThe catalyst of (4), wherein the heating temperature in the step (6) is 950 ℃.
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