CN102728377B - A kind of RE perovskite type catalyst and preparation method thereof - Google Patents
A kind of RE perovskite type catalyst and preparation method thereof Download PDFInfo
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- 239000003054 catalyst Substances 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 40
- 229910052746 lanthanum Inorganic materials 0.000 claims abstract description 36
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical group [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000006104 solid solution Substances 0.000 claims abstract description 18
- 229910052878 cordierite Inorganic materials 0.000 claims abstract description 16
- 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 claims abstract description 16
- HIGRAKVNKLCVCA-UHFFFAOYSA-N alumine Chemical class C1=CC=[Al]C=C1 HIGRAKVNKLCVCA-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000011159 matrix material Substances 0.000 claims abstract description 14
- 239000000919 ceramic Substances 0.000 claims abstract description 13
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 8
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 8
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910017052 cobalt Inorganic materials 0.000 claims abstract description 8
- 239000010941 cobalt Substances 0.000 claims abstract description 8
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 8
- 239000011733 molybdenum Substances 0.000 claims abstract description 8
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 8
- 239000010955 niobium Substances 0.000 claims abstract description 8
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000010936 titanium Substances 0.000 claims abstract description 8
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 8
- 229910052802 copper Inorganic materials 0.000 claims abstract description 5
- 239000010949 copper Substances 0.000 claims abstract description 5
- 238000007598 dipping method Methods 0.000 claims abstract description 5
- 229910000314 transition metal oxide Inorganic materials 0.000 claims abstract description 5
- 239000000243 solution Substances 0.000 claims description 10
- 229910002651 NO3 Inorganic materials 0.000 claims description 9
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 9
- 230000004048 modification Effects 0.000 claims description 9
- 238000012986 modification Methods 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 8
- 229910007746 Zr—O Inorganic materials 0.000 claims description 6
- 229910052723 transition metal Inorganic materials 0.000 claims description 5
- 150000003624 transition metals Chemical class 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052799 carbon Inorganic materials 0.000 abstract description 4
- 238000005245 sintering Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 2
- 238000006555 catalytic reaction Methods 0.000 description 7
- 229910000510 noble metal Inorganic materials 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 5
- 230000003197 catalytic effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 229930195733 hydrocarbon Natural products 0.000 description 3
- 150000002430 hydrocarbons Chemical class 0.000 description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 3
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 238000000498 ball milling Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000010970 precious metal Substances 0.000 description 2
- 239000012495 reaction gas Substances 0.000 description 2
- KRKNYBCHXYNGOX-UHFFFAOYSA-K Citrate Chemical compound [O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O KRKNYBCHXYNGOX-UHFFFAOYSA-K 0.000 description 1
- 230000010718 Oxidation Activity Effects 0.000 description 1
- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000001147 anti-toxic effect Effects 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 239000008199 coating composition Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000003980 solgel method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Abstract
The present invention provides a kind of RE perovskite type catalyst and preparation method thereof, the solid solution hydrogen-storing material modified with lanthanum and using the modified alumine with high specific surface area material of lanthanum as the carrier of RE perovskite type catalyst, in dipping process, molybdenum, cobalt, titanium, niobium, the form of copper are dipping active component for nanocrystalline transition metal oxide, with cordierite ceramic as matrix.Using RE perovskite type catalyst and preparation method thereof of the present invention, reacting initial temperature height low, active, air speed subject range width, have the performances such as excellent anti-poisoning, water resistant, anticaking carbon, high temperature sintering resistant simultaneously, heat stability is strong, and products application is extensive.
Description
Technical field
The present invention relates to a kind of catalyst and preparation method thereof, particularly relate to a kind of RE perovskite type catalyst and preparation method thereof.
Background technology
Air pollution has been increasingly becoming the major issue affecting our life, shortage of resources is the most serious, natural gas is as one of three big energy, there is rich reserves, the feature that cheap and the thermal efficiency is high, but its main component methyl hydride combustion temperature is high, use traditional combustion system can produce the pollutant such as more NOx, CO, HC, and energy utilization rate is low, the shortcoming that catalysis burning avoids flame combustion, reduce the discharge of pollutant, have that initiation temperature is low, energy consumption is low and the advantage such as flameholding is it is considered to be optimal combustion system.Catalysis burning includes gas, liquid, and the burning of solid matter, and this will become the combustion system of main flow.The key technology of catalysis burning is to find the catalyst that a kind of high-temperature stability is good, catalysis activity is high.
At present, main catalyst is divided into two big classes: a class is the loaded noble metal catalyst that under cryogenic conditions, catalytic performance is good；Another kind of is the metal oxide catalyst that catalytic performance is good under the high temperature conditions, such as perofskite type oxide, transition metal oxide solid solution and hexa-aluminate etc..Catalyst conventional on the market is based on noble metal catalyst, although this catalyst has advantages such as the highest oxidation activity and easy recovery, but there is the shortcomings such as resource scarcity, expensive and resistance to poison be poor, and application is many based on industry.And rare earth perovskite catalyst is a kind of new and effective all types of industries exhaust gas purifying catalyst, nano-perovskite type composite oxides are the effective catalysts of carbon monoxide, its initial activity and life-span are better than noble metal catalyst, have catalysis burning and the dual function of NOx reduction.Simultaneously because nano-perovskite type catalyst has good heat stability, become carbon dioxide and water to have well hydro carbons burning conversion under wider temperature range and be catalyzed activity.Chinese patent CN101528344A discloses a kind of method for preparing active perovskite base carrier coating formulation, prepared by co-precipitation, citrate, sol-gel process or ball milling and obtain completely synthetic perovskite structure through high-temperature heat treatment after presoma, and be dispersed in water and triethanolamine ball milling to increase specific surface area.After high temperature removes disperse medium, being mixed to prepare slurry formulations with other additives and be coated on carrier prepared catalytic converter, this converter is in air speed 20000h-1Time, the conversion ratio that 150 DEG C are is 20%, and conversion ratio when 400 DEG C is 99%.Although the specific surface area of perovskite-based catalyst prepared by employing the method improves, but such catalyst needs the most just to have preferable catalytic performance, is not suitable for the catalysis oxidation of CO under normal temperature condition.Chinese patent CN102029167A discloses a kind of catalyst containing nano perovskite type rare-earth oxide and preparation method thereof.This catalysis material is with cordierite honeycomb ceramic as carrier, the coating coating back loading precious metals pd containing nano perovskite type rare-earth oxide is prepared from, the quality of its coating material is the 10～35% of cordierite honeycomb ceramic quality, the quality of described noble metal is the 0～5% of coating material quality, the composition of described coating material and weight/mass percentage composition are nano perovskite type rare-earth oxide 1～20%, Y-Al3O279～98%, additive 1%.Catalyst prepared by the method have employed the expensive and precious metal material of resource scarcity, and anti-toxic is poor, and water resistant, anticaking carbon and high temperature sintering resistant ability are the most poor.In view of this, how to reduce initial temperature, improve reactivity, expand air speed subject range, make up the deficiency of the noble metal of scarcity of resources simultaneously, be a problem demanding prompt solution.
Summary of the invention
Have problems in prior art, it is an object of the invention to provide a kind of RE perovskite type catalyst, solid solution hydrogen-storing material with lanthanum modification and the alumine with high specific surface area material with lanthanum modification are as carrier, with molybdenum, cobalt, titanium, niobium, copper form for nanocrystalline transition metal oxide for dipping active component, with cordierite ceramic as matrix.
Preferably, the matrix of RE perovskite type catalyst is honeycomb-like cordierite pottery.
Another object of the present invention is to provide the preparation method of a kind of RE perovskite type catalyst, including:
1) nitrate solution of transition metal impregnates the mixture of the modified solid solution hydrogen-storing material of the lanthanum alumine with high specific surface area material modified with lanthanum, and 90～110 DEG C of water-baths are dried, roasting 1.5～2.5 hours in 550～650 DEG C of air, make serosity；
2) being coated in by serosity on honeycomb-like cordierite ceramic matrix, 90～110 DEG C of water-baths are dried, roasting 1.5～2.5 hours in 550～650 DEG C of air, obtain fresh sample.
Preferably, by step 2) in fresh sample at a temperature of 900～1100 DEG C, heat 4.5～5.5 hours, obtain aged samples；
Preferably, step 1) in the nitrate solution that nitrate solution is molybdenum, cobalt, titanium, niobium, copper of transition metal；
Preferably, step 1) in the modified solid solution hydrogen-storing material of lanthanum be the modified Ce-Zr-O solid solution hydrogen-storing material of lanthanum；
Preferably, in the Ce-Zr-O solid solution hydrogen-storing material that lanthanum is modified, the mol ratio of Ce/Zr is 0.3～0.5, and the mass fraction of lanthanum is 5%；
Preferably, step 1) in the modified solid solution hydrogen-storing material of the lanthanum alumine with high specific surface area material modified with lanthanum mix for mass ratio such as grade；
Preferably step 1) in the modified alumine with high specific surface area material of lanthanum prepare under conditions of 900～1100 DEG C of roastings 4.5～5.5 hours, specific surface area is 100～140m2/g。
Using RE perovskite type catalyst and preparation method thereof of the present invention, reacting initial temperature height low, active, air speed subject range width, have the performances such as excellent anti-poisoning, water resistant, anticaking carbon, high temperature sintering resistant simultaneously, heat stability is strong, and products application is extensive.
Accompanying drawing explanation
Reader is after having read the detailed description of the invention of the present invention referring to the drawings, it will more clearly understand various aspects of the invention.Wherein,
Fig. 1 shows according to the present invention, the preparation method flow chart of RE perovskite type catalyst.
Detailed description of the invention
With reference to the accompanying drawings, embodiments of the present invention are described in further detail.
The catalyst used on the market at present is based on noble metal catalyst, but because of its scarcity of resources, expensive, the feature of resistance to toxic difference and make it use increasingly and be restricted, it is an object of the invention to provide a kind of RE perovskite type catalyst and preparation method thereof.The RE perovskite type catalyst solid solution hydrogen-storing material with lanthanum modification and the alumine with high specific surface area material with lanthanum modification are as carrier, with molybdenum, cobalt, titanium, niobium, copper form for nanocrystalline transition metal oxide for dipping active component, with cordierite ceramic as matrix.Wherein, matrix is honeycomb-like cordierite pottery.Fig. 1 shows according to the present invention, the preparation method flow chart of RE perovskite type catalyst.With reference to Fig. 1, the nitrate solution of transition metal is impregnated the mixture S1 of the modified solid solution hydrogen-storing material of the lanthanum alumine with high specific surface area material modified with lanthanum, 90～110 DEG C of water-baths are dried, roasting 1.5～2.5 hours in 550～650 DEG C of air, making serosity S2, serosity is coated in S3 on honeycomb-like cordierite ceramic matrix, 90～110 DEG C of water-baths are dried, roasting 1.5～2.5 hours in 550～650 DEG C of air, prepare fresh sample S4.As required, fresh sample, at a temperature of 900～1100 DEG C, heats 4.5～5.5 hours, obtains aged samples S5.
Embodiment 1
With the molybdenum of metering, cobalt, titanium, niobium, the modified Ce-Zr-O solid solution hydrogen-storing material of the lanthanum of the nitrate solution impregnating mass ratio mixing alumine with high specific surface area material modified with lanthanum of copper, wherein, the mol ratio of Ce/Zr is 0.3, the mass fraction of lanthanum is 5%, the alumine with high specific surface area material of lanthanum modification was through 900 DEG C of roastings 5.5 hours, and specific surface area is 100m2/g.90 DEG C of water-baths of above-mentioned material are dried, roasting 2.5 hours in 550 DEG C of air, then make serosity and be coated on honeycomb-like cordierite ceramic matrix, 90 DEG C of water-baths are dried, and in 550 DEG C of air, roasting 2.5 hours, obtains fresh sample, heat 5.5 hours through 900 DEG C again, i.e. obtain aged samples.The volume of honeycomb-like cordierite ceramic matrix is different because the purposes of catalyst is different.When Hydrocarbon Organic concentration is at 2000mg/m3, air speed 5000h-1, during reaction gas inlet temperature 180 DEG C, clean-up effect >=98%, resistance to 850 DEG C of high temperature, service life was long, no less than 30000 hours.
Embodiment 2
With the molybdenum of metering, cobalt, titanium, niobium, the Ce-Zr-O solid solution hydrogen-storing material modified with lanthanum of nitrate solution impregnating mass ratio mixing of copper and the alumine with high specific surface area material with lanthanum modification, wherein, the mol ratio of Ce/Zr is 0.5, the mass fraction of lanthanum is 5%, the alumine with high specific surface area material of lanthanum modification was through 1100 DEG C of roastings 4.5 hours, and specific surface area is 140m2/g.110 DEG C of water-baths of above-mentioned material are dried, roasting 1.5 hours in 650 DEG C of air, then make serosity and be coated on honeycomb-like cordierite ceramic matrix, 110 DEG C of water-baths are dried, and in 650 DEG C of air, roasting 1.5 hours, obtains fresh sample, heat 4.5 hours through 1100 DEG C again, i.e. obtain aged samples.The volume of honeycomb-like cordierite ceramic matrix is different because the purposes of catalyst is different.When Hydrocarbon Organic concentration is at 8000mg/m3, air speed 20000h-1, during reaction gas inlet temperature 300 DEG C, clean-up effect >=99%, resistance to 850 DEG C of high temperature, service life was long, no less than 30000 hours.
Use RE perovskite type catalyst of the present invention and preparation method thereof, reacting initial temperature height low, active, air speed subject range width, anti-poisoning, water resistant, anticaking carbon, high temperature sintering resistant ability are strong, during product uses, thermal stability is strong, products application is extensive, can be used for chemical industry, the industry discharge such as printing, food, machinery, instrument and meter, household electrical appliance, baking finish are sprayed paint, automobile making, exhausted level material containing aromatic hydrocarbons, the process of the harmful poisonous substance waste gas such as Organic substance and carbon monoxide such as oxygen-containing.
Above, the detailed description of the invention of the present invention is described with reference to the accompanying drawings.But, those of ordinary skill in the art is it is understood that in the case of without departing from the spirit and scope of the present invention, it is also possible to the detailed description of the invention of the present invention is made various change and replacement.These changes and replacement all fall in the range of claims of the present invention limits.
Claims (8)
1. a RE perovskite type catalyst, it is characterized in that, the described RE perovskite type catalyst solid solution hydrogen-storing material with lanthanum modification and the alumine with high specific surface area material with lanthanum modification are as carrier, with molybdenum, cobalt, titanium, niobium, copper form for nanocrystalline transition metal oxide for dipping active component, with cordierite ceramic as matrix.
2. RE perovskite type catalyst as claimed in claim 1, it is characterised in that described matrix is honeycomb-like cordierite pottery.
3. the preparation method of a RE perovskite type catalyst, it is characterised in that comprise the following steps:
1) nitrate solution of transition metal impregnates the mixture of the modified solid solution hydrogen-storing material of the lanthanum alumine with high specific surface area material modified with lanthanum, and 90～110 DEG C of water-baths are dried, roasting 1.5～2.5 hours in 550～650 DEG C of air, make serosity；The nitrate solution of described transition metal is the nitrate solution of molybdenum, cobalt, titanium, niobium, copper；
2) being coated on honeycomb-like cordierite ceramic matrix by described serosity, 90～110 DEG C of water-baths are dried, roasting 1.5～2.5 hours in 550～650 DEG C of air, obtain fresh sample.
4. the preparation method of RE perovskite type catalyst as claimed in claim 3, it is characterised in that by described step 2) in fresh sample at a temperature of 900～1100 DEG C, heat 4.5～5.5 hours, obtain aged samples.
5. the preparation method of RE perovskite type catalyst as claimed in claim 3, it is characterised in that described step 1) in the solid solution hydrogen-storing material modified with lanthanum be the Ce-Zr-O solid solution hydrogen-storing material modified with lanthanum.
6. the preparation method of RE perovskite type catalyst as claimed in claim 5, it is characterised in that in the described Ce-Zr-O solid solution hydrogen-storing material modified with lanthanum, the mol ratio of Ce/Zr is 0.3～0.5, and the mass fraction of lanthanum is 5%.
7. the preparation method of RE perovskite type catalyst as claimed in claim 3, it is characterised in that described step 1) in mix for mass ratio such as grade with the solid solution hydrogen-storing material that lanthanum is modified with the alumine with high specific surface area material modified with lanthanum.
8. the preparation method of RE perovskite type catalyst as claimed in claim 3, it is characterized in that, described step 1) in prepare under conditions of 900～1100 DEG C of roastings 4.5～5.5 hours with the alumine with high specific surface area material that lanthanum is modified, specific surface area is 100～140m2/g。
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| CN103638936B (en) * | 2013-12-24 | 2015-12-09 | 浙江师范大学 | For the spinelle-perovskite composite catalyst and preparation method thereof of purifying industrial organic waste gas |
| CN104689817B (en) * | 2014-12-12 | 2017-02-22 | 湖北航特科技有限责任公司 | Composite oxide catalyst for purification of vehicle tail gas and method for preparing composite oxide catalyst for purification of vehicle tail gas |
| JP6670880B2 (en) * | 2018-04-24 | 2020-03-25 | 株式会社豊田中央研究所 | Oxygen storage material and method for producing the same |
| CN111921534A (en) * | 2020-08-25 | 2020-11-13 | 河南城建学院 | Catalyst for purifying waste gas and preparation method thereof |
| CN113769758B (en) * | 2021-07-29 | 2024-01-09 | 重庆海尔热水器有限公司 | Preparation method of CO purifier and CO purifier |
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| CN102019188A (en) * | 2010-12-20 | 2011-04-20 | 浙江天蓝环保技术有限公司 | Magnetic catalyst for denitration of NH3-SCR smoke and application thereof |
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| Title |
|---|
| Simultaneous catalytic removal of nitrogen oxides and diesel soot particulate over perovskite-related oxides;Yasutake Teraoka等;《Catalysis Today》;19961231;第27卷;第107-113页 * |
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