CN113117727B - Preparation method of honeycomb ceramic catalyst for catalytic oxidation of flue gas CO - Google Patents
Preparation method of honeycomb ceramic catalyst for catalytic oxidation of flue gas CO Download PDFInfo
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- CN113117727B CN113117727B CN202110332315.6A CN202110332315A CN113117727B CN 113117727 B CN113117727 B CN 113117727B CN 202110332315 A CN202110332315 A CN 202110332315A CN 113117727 B CN113117727 B CN 113117727B
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 108
- 239000003054 catalyst Substances 0.000 title claims abstract description 96
- 230000003197 catalytic effect Effects 0.000 title claims abstract description 55
- 230000003647 oxidation Effects 0.000 title claims abstract description 48
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 48
- 239000003546 flue gas Substances 0.000 title claims abstract description 47
- 239000000919 ceramic Substances 0.000 title claims abstract description 21
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- 239000002808 molecular sieve Substances 0.000 claims abstract description 41
- 239000000843 powder Substances 0.000 claims abstract description 41
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims abstract description 41
- 238000001354 calcination Methods 0.000 claims abstract description 27
- 238000001125 extrusion Methods 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000001035 drying Methods 0.000 claims abstract description 23
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 22
- 239000003365 glass fiber Substances 0.000 claims abstract description 15
- 238000002156 mixing Methods 0.000 claims abstract description 14
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract description 13
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims abstract description 12
- 235000011114 ammonium hydroxide Nutrition 0.000 claims abstract description 12
- 238000000465 moulding Methods 0.000 claims abstract description 10
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 9
- 230000032683 aging Effects 0.000 claims abstract description 6
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000010949 copper Substances 0.000 claims description 31
- 239000000463 material Substances 0.000 claims description 14
- 235000010215 titanium dioxide Nutrition 0.000 claims description 13
- 235000011837 pasties Nutrition 0.000 claims description 12
- 229910021536 Zeolite Inorganic materials 0.000 claims description 10
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 10
- 239000010457 zeolite Substances 0.000 claims description 10
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 9
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 8
- SXTLQDJHRPXDSB-UHFFFAOYSA-N copper;dinitrate;trihydrate Chemical compound O.O.O.[Cu+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O SXTLQDJHRPXDSB-UHFFFAOYSA-N 0.000 claims description 7
- 238000000227 grinding Methods 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 4
- 235000021355 Stearic acid Nutrition 0.000 claims description 3
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 3
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 3
- 239000008117 stearic acid Substances 0.000 claims description 3
- 229910052684 Cerium Inorganic materials 0.000 claims description 2
- 229910002651 NO3 Inorganic materials 0.000 claims description 2
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 2
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 claims description 2
- 239000013078 crystal Substances 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims description 2
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 claims description 2
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 claims description 2
- 229910052802 copper Inorganic materials 0.000 claims 1
- 238000001914 filtration Methods 0.000 claims 1
- 229910052709 silver Inorganic materials 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 description 61
- 239000000203 mixture Substances 0.000 description 19
- 238000002474 experimental method Methods 0.000 description 12
- 239000012159 carrier gas Substances 0.000 description 9
- 238000005245 sintering Methods 0.000 description 9
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 7
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 7
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- QQZMWMKOWKGPQY-UHFFFAOYSA-N cerium(3+);trinitrate;hexahydrate Chemical compound O.O.O.O.O.O.[Ce+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O QQZMWMKOWKGPQY-UHFFFAOYSA-N 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000011572 manganese Substances 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- MGWGWNFMUOTEHG-UHFFFAOYSA-N 4-(3,5-dimethylphenyl)-1,3-thiazol-2-amine Chemical compound CC1=CC(C)=CC(C=2N=C(N)SC=2)=C1 MGWGWNFMUOTEHG-UHFFFAOYSA-N 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 239000002671 adjuvant Substances 0.000 description 2
- FTXJFNVGIDRLEM-UHFFFAOYSA-N copper;dinitrate;hexahydrate Chemical compound O.O.O.O.O.O.[Cu+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O FTXJFNVGIDRLEM-UHFFFAOYSA-N 0.000 description 2
- MFUVDXOKPBAHMC-UHFFFAOYSA-N magnesium;dinitrate;hexahydrate Chemical compound O.O.O.O.O.O.[Mg+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MFUVDXOKPBAHMC-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 2
- 239000010948 rhodium Substances 0.000 description 2
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 description 2
- 229910002089 NOx Inorganic materials 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 description 1
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 229910052878 cordierite Inorganic materials 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- MIVBAHRSNUNMPP-UHFFFAOYSA-N manganese(2+);dinitrate Chemical compound [Mn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MIVBAHRSNUNMPP-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement 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
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 238000000643 oven drying Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000013441 quality evaluation Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910001961 silver nitrate Inorganic materials 0.000 description 1
- 229910000108 silver(I,III) oxide Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 239000001038 titanium pigment Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000000041 tunable diode laser absorption spectroscopy Methods 0.000 description 1
Classifications
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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
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/08—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y
- B01J29/10—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y containing iron group metals, noble metals or copper
- B01J29/14—Iron group metals or copper
- B01J29/146—Y-type faujasite
-
- 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
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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
- 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
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- B01J29/00—Catalysts comprising molecular sieves
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/08—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y
- B01J29/16—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y containing arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J29/166—Y-type faujasite
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
- B01J35/56—Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional monoliths
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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
- 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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- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/08—Heat treatment
- B01J37/082—Decomposition and pyrolysis
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- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
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- B01D2257/502—Carbon monoxide
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- B01D—SEPARATION
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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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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract
The invention discloses a preparation method of a honeycomb ceramic catalyst for catalytic oxidation of flue gas CO, which comprises the following steps: s1, preparing Y-type molecular sieve powder loaded with Cu and auxiliary active components; s2, mixing the Y-type molecular sieve powder loaded with Cu and the auxiliary agent active components with titanium dioxide, glass fiber, wood pulp, forming auxiliary agent, desalted water and ammonia water according to a certain proportion to obtain pug with extrusion plasticity; s3, pre-extruding and aging the pug with extrusion plasticity; s4, extruding and molding the pre-extruded and aged pug by using a screw extruder to obtain a honeycomb catalyst blank; s5, drying and calcining the honeycomb catalyst blank. The preparation method of the honeycomb ceramic catalyst for catalytic oxidation of flue gas CO uses Cu with relatively low price as a main active component, can obviously reduce the production cost of the catalyst, and improves the catalytic activity on CO and the service life.
Description
Technical Field
The invention relates to the technical field of purification of carbon monoxide in industrial flue gas, in particular to a preparation method of a honeycomb ceramic catalyst for catalytic oxidation of flue gas CO.
Background
The air quality index (Air Quality Index, abbreviated as AQI) is an index for quantitatively describing the air quality condition, and the larger the value is, the more serious the air pollution condition is, and the more harm to human health is. The main pollutants involved in the air quality evaluation are fine particulate matters (PM 2.5), inhalable particulate matters (PM 10), sulfur dioxide (SO 2 ) Nitrogen dioxide (NO) 2 ) Ozone (O) 3 ) Six items of carbon monoxide (CO).
In the traditional thermal power industry, the online measurement research of the concentration of CO in the flue gas based on the TDLAS technology finds that the change range of the concentration of CO in the flue gas is larger in a long-time operation process, and about one third of the time is kept above 1000ppm for a long time, which is far from the normal emission amount of CO of 70ppm, and for a 600MW unit, if the part of CO which is discharged beyond standard in the flue gas can be utilized, the economic benefit of about 2600 tons of standard coal in one year can be brought.
The basic principle of CO oxidation catalysis is to make CO and O in flue gas 2 The reaction is carried out at a lower temperature to generate CO2, and the reaction not only converts toxic CO into CO 2 Meanwhile, as the reaction is exothermic, the energy generated by the reaction can heat the original flue gas, properly raise the temperature of the original flue gas, is more beneficial to the removal of NOx in the subsequent SCR reactor, and simultaneouslySaving part of energy sources for heating the flue gas.
However, most of the main active components of the CO catalytic oxidation catalyst commonly used in the market are noble metals such as platinum Pt, rhodium Rh and palladium Pt, which are expensive, and most of the processes are coating processes, the active components are coated on the surface of a cordierite honeycomb carrier or a metal carrier to form a thinner active layer, and as the smoke components are complex and contain a large amount of solid particles with different sizes, the abrasion of the smoke on the surface of the CO catalytic oxidation catalyst is obvious before the CO catalytic oxidation device is placed in the SCR device, and the catalytic activity of the CO catalytic oxidation catalyst prepared by using the coating processes is obviously reduced after the surface active layer is abraded and disappears after the CO catalytic oxidation catalyst is used for a period of time. Therefore, it is of great significance to find a flue gas CO catalytic oxidation catalyst which is low in cost and long in catalytic life.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person of ordinary skill in the art.
Disclosure of Invention
The invention aims to provide a preparation method of a honeycomb ceramic catalyst for catalytic oxidation of flue gas CO, which can reduce the production cost and improve the catalytic life.
In order to achieve the above purpose, the invention provides a preparation method of a honeycomb ceramic catalyst for catalytic oxidation of flue gas CO, which comprises the following steps:
s1, preparing Y-type molecular sieve powder loaded with Cu and auxiliary active components;
s2, mixing the Y-type molecular sieve powder loaded with Cu and the auxiliary agent active components with titanium dioxide, glass fiber, wood pulp, forming auxiliary agent, desalted water and ammonia water according to a certain proportion to obtain pug with extrusion plasticity;
s3, pre-extruding and aging the pug with extrusion plasticity;
s4, extruding and molding the pre-extruded and aged pug by using a screw extruder to obtain a honeycomb catalyst blank;
s5, drying and calcining the honeycomb catalyst blank.
In one embodiment of the present invention, in step S1, preparing a Y-type molecular sieve powder loaded with Cu and an auxiliary agent active component comprises the steps of: adding nitrate solution of copper nitrate trihydrate and an auxiliary agent active component into HY type zeolite molecular sieve powder according to a proportion, and stirring for 30min at 35 ℃ to obtain a uniformly mixed pasty material; drying the uniformly mixed pasty material at 110 ℃, and then placing the dried pasty material into a rotary kiln for roasting, wherein the roasting temperature is 400-600 ℃ and the roasting time is 3-8 hours; grinding to a specified mesh number after roasting to obtain Y-type molecular sieve powder loaded with Cu and auxiliary active components; wherein the auxiliary active component comprises one or more of Ce, mn, ag, mg.
In one embodiment of the invention, the content of Cu oxide in the Y-type molecular sieve powder loaded with Cu and the auxiliary active component is 10-20wt%, the content of the oxide of the auxiliary active component is 0.5-5wt%, and the grinding mesh number is 200-2000 meshes.
In one embodiment of the invention, in the step S2, the titanium white powder is in an anatase type crystal form, the forming auxiliary agent is one or more of polyethylene oxide, sodium carboxymethyl cellulose and stearic acid, the length of the glass fiber is 1-5mm, and the discharging water of the pug with extrusion plasticity is 27-30%.
In one embodiment of the present invention, in step S3, the pre-extruding and aging treatment of the pug having extrusion plasticity comprises the following steps: the pug with extrusion plasticity is pre-extruded and filtered by a pre-extruder, and the pre-extruded pug is aged for 24 hours.
In one embodiment of the present invention, in step S4, the extrusion pressure of the screw extruder is 5 to 8MPa.
In one embodiment of the present invention, in step S5, drying and calcining the honeycomb catalyst blank comprises the steps of: drying the honeycomb catalyst blank in a drying chamber, and sending the dried blank into a tunnel kiln for calcination.
In one embodiment of the invention, the temperature of the drying chamber is 30-50 ℃, the humidity is 30-50%, and the drying time is 10-15d.
In one embodiment of the invention, the calcination temperature of the tunnel kiln is 20-750 ℃ and the calcination time is 12-48 h.
In one embodiment of the present invention, in step S2, the composition of the pug having extrusion plasticity is: 25-100 parts of Y-type molecular sieve powder loaded with Cu and auxiliary active components, 400-475 parts of titanium dioxide, 180-260 parts of desalted water, 30-60 parts of ammonia water, 20-35 parts of glass fiber, 1.5-3 parts of wood pulp and 2-8 parts of forming auxiliary.
Compared with the prior art, the preparation method of the honeycomb ceramic catalyst for catalytic oxidation of flue gas CO has the following advantages:
(1) The invention uses Cu with relatively low price as the main active ingredient, and can obviously reduce the production cost of the catalyst.
(2) The main active component Cu and the auxiliary agent active component are loaded on the HY type zeolite molecular sieve in advance to obtain Y type molecular sieve powder loaded with the Cu and the auxiliary agent active component, and then the Y type molecular sieve powder is mixed with titanium white powder, glass fiber, wood pulp, forming auxiliary agent and desalted water and then extruded for forming, so that the Y type molecular sieve powder has higher specific surface area and mass transfer speed, and the catalytic activity to CO is further improved.
(3) The honeycomb catalytic oxidation catalyst prepared by adopting the integral molding extrusion process has the advantages that under the complex working condition of sintering flue gas, the surface layer is worn and the inside is still an active layer, so that the original catalytic activity can be kept for a long time, and the service life of the catalyst is longer than that of the catalyst prepared by the coating process.
Drawings
Fig. 1 is a flow chart of a method for preparing a honeycomb ceramic catalyst for catalytic oxidation of flue gas CO according to an embodiment of the invention.
Detailed Description
The following detailed description of embodiments of the invention is, therefore, to be taken in conjunction with the accompanying drawings, and it is to be understood that the scope of the invention is not limited to the specific embodiments.
Throughout the specification and claims, unless explicitly stated otherwise, the term "comprise" or variations thereof such as "comprises" or "comprising", etc. will be understood to include the stated element or component without excluding other elements or components.
Fig. 1 is a flow chart of a method for preparing a honeycomb ceramic catalyst for catalytic oxidation of flue gas CO according to an embodiment of the invention.
Example 1:
the preparation method of the honeycomb ceramic catalyst for catalytic oxidation of flue gas CO comprises the following steps: 60.72 parts of copper nitrate trihydrate is dissolved in 50 parts of desalted water at 35 ℃, 12.62 parts of cerium nitrate hexahydrate is dissolved in 10 parts of desalted water at 35 ℃, then the mixture is mixed with 75 parts of HY type zeolite molecular sieve powder, the mixture is stirred for 30min at 35 ℃, the uniformly mixed pasty material is dried at 110 ℃ and then is placed in a rotary kiln for roasting at 550 ℃ for 5h, and the mixture is ground to 800 meshes after cooling, so that Y type molecular sieve powder loaded with Cu and an auxiliary agent active component Ce (the CuO content is 20wt percent and CeO is obtained) 2 The content is 5wt percent), 100 parts of Y-type molecular sieve powder loaded with Cu and an auxiliary agent active component Ce, 400 parts of titanium dioxide, 5 parts of polyethylene oxide, 0.5 part of carboxymethyl cellulose, 200 parts of desalted water, 50 parts of ammonia water, 28 parts of glass fiber (2.5 mm) and 2 parts of wood pulp are uniformly mixed according to a proportion, and then are mixed in a mixer to obtain pug with extrusion plasticity, and the moisture content of the pug is regulated to 28 percent. The pug after mixing is pre-extruded and filtered by an extruder, and then is kept stand and aged for 24 hours at normal temperature. Extruding and molding the aged pug by using a screw extruder at the extrusion pressure of 6MPa to obtain a honeycomb catalyst blank, wherein the appearance size specification of the catalyst blank is as follows: the number of holes is 18 multiplied by 18, the cross section is 150mm multiplied by 150mm, the inner wall is 1.1mm, the outer wall is 1.7mm, and the pitch is 8.2mm. Drying the catalyst blank for 12 days at 40 ℃ under the humidity condition of 48%, and then feeding the catalyst blank into a tunnel kiln for calcination, wherein the calcination temperature is 25-550 ℃ and the calcination time is 32 hours, thus obtaining the catalyst finished product.
The catalyst finished product prepared in the embodiment is subjected to a simulated sintering flue gas CO catalytic oxidation experiment, wherein the inlet flue gas concentration is 1000ppm of CO and 5% of O 2 The carrier gas is N 2 Airspeed 32000h -1 The catalytic oxidation efficiency of the catalyst finished product on CO at 110 ℃ is 98.7%.
The simulated sintering flue gas CO catalytic oxidation experiment adopts a fixed bed quartz reactor with temperature programming control to carry out catalytic activity test, and the detection means uses a VARIO PLUS flue gas analyzer of Germany MRU company to analyze the tail gas components after reaction.
Example 2:
the preparation method of the honeycomb ceramic catalyst for catalytic oxidation of flue gas CO comprises the following steps: 60.72 parts of copper nitrate trihydrate is dissolved in 50 parts of desalted water at 35 ℃, then is mixed with 20.57 parts of 50% manganese nitrate solution and 75 parts of HY type zeolite molecular sieve, stirred for 30min at 35 ℃, the uniformly mixed pasty material is dried at 110 ℃ and then is placed in a rotary kiln for roasting at 450 ℃ for 8h, cooled and ground to 500 meshes, and the Y type molecular sieve powder loaded with Cu and auxiliary active component Mn is obtained (CuO content is 20wt%, mnO) 2 The content is 5 wt%) 100 parts of Y-type molecular sieve powder loaded with Cu and auxiliary agent active component Mn are uniformly mixed with 400 parts of titanium white powder, 4 parts of polyethylene oxide, 1 part of carboxymethyl cellulose, 180 parts of desalted water, 60 parts of ammonia water, 35 parts of glass fiber (5 mm) and 1.5 parts of wood pulp according to a proportion, and then the mixture is mixed in a mixing mill to obtain pug with extrusion plasticity, and the moisture content of the pug is regulated to 27%. The pug after mixing is pre-extruded and filtered by an extruder, and then is kept stand and aged for 24 hours at normal temperature. Extruding and molding the aged pug by using a screw extruder, wherein the extruding pressure is 7.5MPa, and extruding the pug into a honeycomb catalyst blank, wherein the appearance size specification of the catalyst blank is as follows: the number of holes is 18 multiplied by 18, the cross section is 150mm multiplied by 150mm, the inner wall is 1.1mm, the outer wall is 1.7mm, and the pitch is 8.2mm. Drying the catalyst blank for 15 days at 40 ℃ under the humidity condition of 40%, then feeding the catalyst blank into a tunnel kiln for calcination at the temperature ranging from 25 ℃ to 500 ℃ for 48 hours, and obtaining a catalyst finished product.
The catalyst finished product obtained by the preparation is subjected to a simulated sintering flue gas CO catalytic oxidation experiment, the inlet flue gas concentration is 1000ppm CO, the concentration of O2 is 5%, and the carrier gas is N 2 Airspeed 32000h -1 The catalytic oxidation efficiency of the catalyst finished product to CO at 110 ℃ is 93.1%.
Example 3:
the preparation method of the honeycomb ceramic catalyst for catalytic oxidation of flue gas CO comprises the following steps: 60.72 parts of copper nitrate hexahydrate is dissolved in 50 parts of desalted water at 35 ℃, 31.8 parts of magnesium nitrate hexahydrate is dissolved in 30 parts of desalted water at 35 ℃, then the mixture is mixed with 75 parts of HY type zeolite molecular sieve, the mixture is stirred for 30 minutes at 35 ℃, the paste material which is uniformly mixed is dried at 110 ℃ and then is placed in a rotary kiln for roasting at 600 ℃ for 3 hours, the mixture is cooled and then ground to 1000 meshes, Y type molecular sieve powder loaded with Cu and an auxiliary agent active component Mn (the content of CuO is 20wt%, and the content of MgO is 5 wt%) is obtained, 80 parts of Y type molecular sieve powder loaded with Cu and the auxiliary agent active component Mn, 400 parts of titanium dioxide, 5 parts of polyethylene oxide, 1 part of stearic acid, 2 parts of carboxymethyl cellulose, 260 parts of desalted water, 30 parts of ammonia water, 20 parts of glass fiber (1 mm) and 2 parts of wood pulp are uniformly mixed in proportion, and then the mixture is carried out in a mixing mill, and the moisture content of pug is adjusted to 28%. The pug after mixing is pre-extruded and then kept stand and aged for 24 hours at normal temperature. Extruding and molding the aged pug by using a screw extruder, wherein the extruding pressure is 8MPa, and extruding the pug into a honeycomb catalyst blank, wherein the appearance size specification of the catalyst blank is as follows: the number of holes is 18 multiplied by 18, the cross section is 150mm multiplied by 150mm, the inner wall is 1.1mm, the outer wall is 1.7mm, and the pitch is 8.2mm. Drying the catalyst blank for 11 days at 50 ℃ under the condition of 30% humidity, then feeding the catalyst blank into a tunnel kiln for calcination, wherein the calcination temperature is 25-500 ℃ and the calcination time is 36 hours, and then obtaining the catalyst finished product.
The catalyst finished product obtained by the preparation is subjected to a simulated sintering flue gas CO catalytic oxidation experiment, wherein the inlet flue gas concentration is 1000ppm of CO and 5% of O 2 The carrier gas is N 2 Airspeed 32000h -1 The catalytic oxidation efficiency of the catalyst finished product to CO at 110 ℃ is 83.5%. MgO is less effective as a co-agent than other metal oxides.
Example 4:
the preparation method of the honeycomb ceramic catalyst for catalytic oxidation of flue gas CO comprises the following steps: 30.36 parts of copper nitrate trihydrate is dissolved in 30 parts of desalted water at 35 ℃, 6.31 parts of cerium nitrate hexahydrate is dissolved in 10 parts of desalted water at 35 ℃, and then mixed with 85 parts of HY type zeolite molecular sieve,stirring at 35deg.C for 30min, oven drying the paste material at 110deg.C, calcining at 550deg.C for 5 hr, cooling, grinding to 800 mesh to obtain Y-type molecular sieve powder loaded with Cu and adjuvant active component Ce, wherein CuO content is 10%, ceO content is 10% 2 100 parts of Y-type molecular sieve powder loaded with Cu and an auxiliary agent active component Ce, 400 parts of titanium dioxide, 5 parts of polyethylene oxide, 0.5 part of carboxymethyl cellulose, 200 parts of desalted water, 50 parts of ammonia water, 28 parts of glass fiber (2.5 mm) and 2 parts of wood pulp are uniformly mixed according to a proportion, and then are mixed in a mixer to obtain pug with extrusion plasticity, and the moisture content of the pug is regulated to 28%. The pug after mixing is pre-extruded and then kept stand and aged for 24 hours at normal temperature. Extruding and molding the aged pug by using a screw extruder, wherein the extruding pressure is 6MPa, and extruding the pug into a honeycomb catalyst blank, wherein the appearance size specification of the catalyst blank is as follows: the number of holes is 18 multiplied by 18, the cross section is 150mm multiplied by 150mm, the inner wall is 1.1mm, the outer wall is 1.7mm, and the pitch is 8.2mm. Drying the catalyst blank for 12d at 40 ℃ under the humidity condition of 50%, then feeding the catalyst blank into a tunnel kiln for calcination at the temperature range of 25-550 ℃ for 32h, and obtaining the catalyst finished product.
The catalyst finished product obtained by the preparation is subjected to a simulated sintering flue gas CO catalytic oxidation experiment, wherein the inlet flue gas concentration is 1000ppm of CO and 5% of O 2 The carrier gas is N 2 Airspeed 32000h -1 The catalytic oxidation efficiency of the catalyst finished product to CO at 110 ℃ is 94.6%.
Example 5:
dissolving 60.72 parts of copper nitrate trihydrate in 50 parts of desalted water at 35 ℃, dissolving 12.62 parts of cerium nitrate hexahydrate in 10 parts of desalted water at 35 ℃, mixing with 75 parts of HY type zeolite molecular sieve, stirring for 30min at 35 ℃, drying the uniformly mixed pasty material at 110 ℃, placing the dried pasty material in a rotary kiln at 550 ℃ for roasting for 5h, cooling, grinding to 1000 meshes, and obtaining Y type molecular sieve powder loaded with Cu and an auxiliary active component Ce (CuO content is 20wt%, ceO) 2 Content 5 wt%) 100 portions of Y-type molecular sieve powder loaded with Cu and adjuvant active component Ce and 400 portions of titanium white powder, 5 portions of polyethylene oxide, 0.5 portion of carboxymethyl cellulose, 190 portions of desalted water, 50 portions of ammonia water, 28 portions of glass fibre (2.5 mm) and 2 portions of wood pulp are mixed according to a certain proportionMixing in a mixer after mixing uniformly to obtain pug with extrusion plasticity, and adjusting the moisture content of the pug to 30%. The pug after mixing is pre-extruded and then kept stand and aged for 24 hours at normal temperature. The aged pug is extruded and molded by a screw extruder at the extrusion pressure of 5MPa to form a honeycomb catalyst blank, and the appearance size specifications of the catalyst blank are 18 multiplied by 18 holes, 150mm multiplied by 150mm in cross section, 1.1mm in inner wall, 1.7mm in outer wall and 8.2mm in pitch. Drying the catalyst blank for 13 days at 40 ℃ under the humidity condition of 50%, then feeding the catalyst blank into a tunnel kiln for calcination at the temperature ranging from 25 ℃ to 550 ℃ for 48 hours, and obtaining a catalyst finished product.
The catalyst finished product obtained by the preparation is subjected to a simulated sintering flue gas CO catalytic oxidation experiment, wherein the inlet flue gas concentration is 1000ppm of CO and 5% of O 2 The carrier gas is N 2 Airspeed 32000h -1 The catalytic oxidation efficiency of the catalyst sample for CO at 110 ℃ was 96.4%.
Example 6:
the preparation method of the honeycomb ceramic catalyst for catalytic oxidation of flue gas CO comprises the following steps: 60.72 parts of copper nitrate hexahydrate is dissolved in 50 parts of desalted water at 35 ℃, 12.62 parts of cerium nitrate hexahydrate is dissolved in 10 parts of desalted water at 35 ℃, then the mixture is mixed with 75 parts of HY type zeolite molecular sieve powder, the mixture is stirred for 30min at 35 ℃, the uniformly mixed pasty material is dried at 110 ℃, then the mixture is placed in a rotary kiln for roasting at 550 ℃ for 5h, the mixture is cooled and ground to 800 meshes, the Y type molecular sieve powder loaded with Cu and an auxiliary agent active component Ce (the content of CuO is 20wt percent and the content of CeO2 is 5wt percent) is obtained, 25 parts of the Y type molecular sieve powder loaded with Cu and the auxiliary agent active component Ce is uniformly mixed with 400 parts of titanium dioxide, 5 parts of polyethylene oxide, 0.5 part of carboxymethyl cellulose, 200 parts of desalted water, 50 parts of ammonia water, 28 parts of glass fiber (2.5 mm) and 2 parts of wood pulp according to a proportion, the mixture is kneaded in a mixer, and the pug with extrusion plasticity is obtained, and the moisture content of the pug is adjusted to 28%. The pug after mixing is pre-extruded and filtered by an extruder, and then is kept stand and aged for 24 hours at normal temperature. Extruding and molding the aged pug by using a screw extruder at the extrusion pressure of 6MPa to obtain a honeycomb catalyst blank, wherein the appearance size specification of the catalyst blank is as follows: the number of holes is 18 multiplied by 18, the cross section is 150mm multiplied by 150mm, the inner wall is 1.1mm, the outer wall is 1.7mm, and the pitch is 8.2mm. Drying the catalyst blank for 12 days at 40 ℃ under the humidity condition of 48%, and then feeding the catalyst blank into a tunnel kiln for calcination, wherein the calcination temperature is 25-550 ℃ and the calcination time is 32 hours, thus obtaining the catalyst finished product.
The catalyst finished product prepared in the embodiment is subjected to a simulated sintering flue gas CO catalytic oxidation experiment, the inlet flue gas concentration is 1000ppm CO, the concentration of O2 is 5%, the carrier gas is N2, the airspeed is 32000h < -1 >, and the catalytic oxidation efficiency of the catalyst finished product to CO at 110 ℃ is 78.7%.
Example 7:
the preparation method of the honeycomb ceramic catalyst for catalytic oxidation of flue gas CO comprises the following steps: 45.56 parts of copper nitrate trihydrate is dissolved in 50 parts of desalted water at 35 ℃, 0.73 part of silver nitrate is dissolved in 10 parts of desalted water at 35 ℃, then the mixture is mixed with 84.5 parts of HY type zeolite molecular sieve powder, the mixture is stirred for 30min at 35 ℃, the uniformly mixed pasty material is dried at 110 ℃, then the mixture is placed in a rotary kiln for roasting at 400 ℃ for 5h, the mixture is cooled and ground to 2000 meshes, the Y type molecular sieve powder loaded with Cu and additive active component Ag (the CuO content is 15wt% and the Ag2O content is 0.5 wt%) is obtained, 100 parts of Y type molecular sieve powder loaded with Cu and additive active component Ag are mixed uniformly in proportion with 475 parts of titanium pigment, 1.5 parts of polyethylene oxide, 0.5 part of carboxymethyl cellulose, 200 parts of desalted water, 50 parts of ammonia water, 28 parts of glass fiber (2.5 mm) and 2 parts of wood pulp, the mixture is kneaded in a mixer, and the pug with extrusion plasticity is obtained, and the moisture content of the pug is adjusted to 28%. The pug after mixing is pre-extruded and filtered by an extruder, and then is kept stand and aged for 24 hours at normal temperature. Extruding and molding the aged pug by using a screw extruder at the extrusion pressure of 6MPa to obtain a honeycomb catalyst blank, wherein the appearance size specification of the catalyst blank is as follows: the number of holes is 18 multiplied by 18, the cross section is 150mm multiplied by 150mm, the inner wall is 1.1mm, the outer wall is 1.7mm, and the pitch is 8.2mm. Drying the catalyst blank for 12 days at 40 ℃ under the humidity condition of 48%, and then feeding the catalyst blank into a tunnel kiln for calcination, wherein the calcination temperature is 25-750 ℃ and the calcination time is 32 hours, thus obtaining the catalyst finished product.
The catalyst finished product prepared in the embodiment is subjected to a simulated sintering flue gas CO catalytic oxidation experiment, the inlet flue gas concentration is 1000ppm CO, the concentration of O2 is 5%, the carrier gas is N2, the airspeed is 32000h < -1 >, and the catalytic oxidation efficiency of the catalyst finished product to CO at 110 ℃ is 81.7%.
In addition, the invention also carries out a comparative test:
sample 1: the sample prepared in example 1;
sample 2: CAS-KR-Y-01-F type CO catalytic oxidation catalyst of Ke Rui Co of China;
sample 3: honeycomb type CO catalytic oxidation catalyst of Jiangxi Hua green environmental protection equipment limited company;
comparative experiment 1: CO at the inlet flue gas concentration of 1000ppm, O5% 2 The carrier gas is N 2 Airspeed 32000h -1 The catalytic oxidation efficiency of the catalyst samples at 110℃for CO was measured separately.
Comparative experiment 2: referring to a 5.2.3 abrasion experiment device in DL/T1286-2013, carrying out 2h abrasion experiment on the catalyst sample with the same size according to the test conditions in the standard, and measuring the catalytic oxidation efficiency of the catalyst sample on CO at 110 ℃ again under the experimental conditions that the inlet smoke concentration is 1000ppm of CO,5% of O2, the carrier gas is N2 and the airspeed is 32000h < -1 >. Comparative experimental data are shown in the following table:
in conclusion, the catalyst finished product prepared by the preparation method of the honeycomb ceramic catalyst for catalytic oxidation of flue gas CO has the advantages of remarkably improving the catalytic activity on CO and having longer service life.
The foregoing descriptions of specific exemplary embodiments of the present invention are presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application to thereby enable one skilled in the art to make and utilize the invention in various exemplary embodiments and with various modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.
Claims (4)
1. The preparation method of the honeycomb ceramic catalyst for catalytic oxidation of flue gas CO is characterized by comprising the following steps of:
s1, preparing Y-type molecular sieve powder loaded with Cu and auxiliary active components;
s2, mixing the Y-type molecular sieve powder loaded with Cu and the auxiliary agent active components with titanium dioxide, glass fiber, wood pulp, forming auxiliary agent, desalted water and ammonia water according to a certain proportion to obtain pug with extrusion plasticity;
s3, pre-extruding and aging the pug with extrusion plasticity;
s4, extruding and molding the pre-extruded and aged pug by using a screw extruder to obtain a honeycomb catalyst blank;
s5, drying and calcining the honeycomb catalyst blank;
in step S1, preparing the Y-type molecular sieve powder loaded with Cu and auxiliary agent active components includes the steps of: adding nitrate solution of copper nitrate trihydrate and an auxiliary agent active component into HY type zeolite molecular sieve powder according to a proportion, and stirring for 30min at 35 ℃ to obtain a uniformly mixed pasty material; drying the uniformly mixed pasty material at 110 ℃, and then placing the dried pasty material into a rotary kiln for roasting, wherein the roasting temperature is 400-600 ℃ and the roasting time is 3-8 hours; grinding to a specified mesh number after roasting to obtain Y-type molecular sieve powder loaded with Cu and auxiliary active components; wherein the auxiliary active component comprises one or more of Ce, mn and Ag;
the Y-type molecular sieve powder loaded with Cu and auxiliary active components contains 20 percent wt percent of Cu oxide, 5 percent of the oxide of the auxiliary active components and 800 meshes of grinding meshes, the crystal form of the titanium white powder is anatase type in the step S2, the forming auxiliary is one or more of polyethylene oxide, sodium carboxymethyl cellulose and stearic acid, the length of glass fiber is 2.5mm, and the discharging moisture of pug with extrusion plasticity is 28 percent; in step S3, the pre-extruding and aging treatment of the pug with extrusion plasticity includes the following steps: pre-extruding and filtering the pug with extrusion plasticity by using a pre-extruder, and aging the pre-extruded pug for 24 hours; in the step S4, the extrusion pressure of the screw extruder is 6MPa;
the pug with extrusion plasticity comprises the following components: 100 parts of Y-type molecular sieve powder loaded with Cu and auxiliary active components, 400-475 parts of titanium dioxide, 180-260 parts of desalted water, 30-60 parts of ammonia water, 20-35 parts of glass fiber, 1.5-3 parts of wood pulp and 2-8 parts of forming auxiliary.
2. The method for preparing a honeycomb ceramic catalyst for catalytic oxidation of flue gas CO according to claim 1, wherein in step S5, drying and calcining the honeycomb catalyst blank comprises the steps of: and drying the honeycomb catalyst blank in a drying chamber, and sending the dried blank into a tunnel kiln for calcination.
3. The method for preparing a honeycomb ceramic catalyst for catalytic oxidation of flue gas CO according to claim 2, wherein the temperature of the drying chamber is 30-50 ℃, the humidity is 30% -50%, and the drying time is 10-15d.
4. The method for preparing a honeycomb ceramic catalyst for catalytic oxidation of flue gas CO according to claim 3, wherein the calcination temperature of the tunnel kiln is 20-750 ℃ and the calcination time is 12-48 h.
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| CN114768864A (en) * | 2022-04-22 | 2022-07-22 | 山东亮剑环保新材料有限公司 | Preparation method of metal modified TS-1 titanium silicalite molecular sieve CO catalyst |
| CN115611616A (en) * | 2022-10-18 | 2023-01-17 | 国家电投集团远达环保催化剂有限公司 | Honeycomb wear-resistant unit body and preparation method thereof |
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