CN105688980A - 一种分子筛负载scr催化剂的制备方法 - Google Patents
一种分子筛负载scr催化剂的制备方法 Download PDFInfo
- Publication number
- CN105688980A CN105688980A CN201610133584.9A CN201610133584A CN105688980A CN 105688980 A CN105688980 A CN 105688980A CN 201610133584 A CN201610133584 A CN 201610133584A CN 105688980 A CN105688980 A CN 105688980A
- Authority
- CN
- China
- Prior art keywords
- molecular sieve
- catalyst
- scr catalyst
- preparation
- hour
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002808 molecular sieve Substances 0.000 title claims abstract description 49
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 title claims abstract description 49
- 239000003054 catalyst Substances 0.000 title claims abstract description 45
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 238000010531 catalytic reduction reaction Methods 0.000 title abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 239000008367 deionised water Substances 0.000 claims description 15
- 229910021641 deionized water Inorganic materials 0.000 claims description 15
- 239000011230 binding agent Substances 0.000 claims description 8
- 239000000843 powder Substances 0.000 claims description 7
- 239000012065 filter cake Substances 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 4
- DUFCMRCMPHIFTR-UHFFFAOYSA-N 5-(dimethylsulfamoyl)-2-methylfuran-3-carboxylic acid Chemical group CN(C)S(=O)(=O)C1=CC(C(O)=O)=C(C)O1 DUFCMRCMPHIFTR-UHFFFAOYSA-N 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 239000012691 Cu precursor Substances 0.000 claims description 3
- 238000000498 ball milling Methods 0.000 claims description 3
- 239000006255 coating slurry Substances 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 238000005470 impregnation Methods 0.000 claims description 3
- 150000002500 ions Chemical class 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 239000002243 precursor Substances 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 3
- 238000010926 purge Methods 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- 239000000725 suspension Substances 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 11
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 8
- 230000003197 catalytic effect Effects 0.000 abstract description 7
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 abstract description 4
- 229910021529 ammonia Inorganic materials 0.000 abstract description 4
- 238000007254 oxidation reaction Methods 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 abstract description 3
- 238000005457 optimization Methods 0.000 abstract description 2
- 230000001737 promoting effect Effects 0.000 abstract description 2
- 239000007787 solid Substances 0.000 abstract description 2
- 230000032683 aging Effects 0.000 abstract 1
- 238000001179 sorption measurement Methods 0.000 abstract 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 26
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 6
- 229910001868 water Inorganic materials 0.000 description 6
- 238000006555 catalytic reaction Methods 0.000 description 5
- 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 4
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- 239000001272 nitrous oxide Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 235000013877 carbamide Nutrition 0.000 description 1
- 239000011162 core material Substances 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 230000007812 deficiency 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
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000005431 greenhouse gas Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000002673 intoxicating effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003878 thermal aging Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 description 1
- 239000002912 waste gas Substances 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
- B01J29/00—Catalysts comprising molecular sieves
- B01J29/82—Phosphates
- B01J29/84—Aluminophosphates containing other elements, e.g. metals, boron
- B01J29/85—Silicoaluminophosphates [SAPO compounds]
-
- 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
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9404—Removing only nitrogen compounds
- B01D53/9409—Nitrogen oxides
- B01D53/9413—Processes characterised by a specific catalyst
- B01D53/9418—Processes characterised by a specific catalyst for removing nitrogen oxides by selective catalytic reduction [SCR] using a reducing agent in a lean exhaust gas
-
- 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
- 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
-
- 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
- B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
- B01J2229/10—After treatment, characterised by the effect to be obtained
- B01J2229/18—After treatment, characterised by the effect to be obtained to introduce other elements into or onto the molecular sieve itself
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Combustion & Propulsion (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Catalysts (AREA)
Abstract
本发明公开了一种分子筛负载SCR催化剂的制备方法,所开发的分子筛负载SCR催化剂,设计了催化剂的两个催化活性单元。通过对分子筛负载方式和组分的优化,设计了促进第一步的催化氧化反应的第一活性单元,以及增强了分子筛固体酸性,促进氨吸附能力的第二活性单元。并且有效协调了这两个催化活性单元的有机统一。并且在提高分子筛催化剂的催化活性的同时,还增强了这种分子筛催化剂的高温水热耐久性能。通过高温水热老化试验后,催化剂的催化活性可维持在95%以上,而常规的V2O5-WO3/TiO2氧化物催化剂几乎完全失活,一般大孔分子筛SCR催化剂活性也会降低50%以上。
Description
技术领域
本发明属于废气处理技术领域,具体涉及一种分子筛负载SCR催化剂的制备方法。
技术背景
大气中的氮氧化物(NOx),形成雾霾的主要元凶之一,包括一氧化氮(NO)、二氧化氮(NO2)、氧化亚氮(N2O)等,一般用NOx表示。氮氧化物是锅炉和内燃机排放气体中的主要有害物质之一,氮氧化物对环境和人体健康有许多危害,对人体有致毒作用,是形成酸雨的主要污染物,与碳氢化合物可形成光化学烟雾,并且是破坏臭氧层的温室气体之一。
针对NOx的净化,目前主流方式是采用尿素分解生成的氨气(NH3)和汽车尾气中氮氧化合物(NOx)发生选择性催化还原反应(SCR),生成氮气(N2)和水(H2O),使得尾气中的氮氧化合物得以除去。在汽车尾气后处理装置的蜂窝状载体上的SCR催化剂,是促进这种选择性催化还原反应,净化汽车尾气的核心材料。
国内外最常用的NH3-SCR催化剂主要分为V-W-TiO2基催化剂,但是低温下催化活性较低,高温水热稳定性差,无法满足越来越严苛的排放标准。由于钒基催化剂有一定的毒性,显然不能满足使用需求。
发明内容
发名目的:针对现有技术中存在的不足,本发明的目的是提供一种分子筛负载SCR催化剂的制备方法,具有制备方法简单,成本低,获得的催化剂具有高温活性和水热稳定性。
技术方案:为实现上述目的,本发明采用的技术方案如下:
一种分子筛负载SCR催化剂的制备方法,包括以下步骤:
1)将铜的前躯体溶液与分子筛加入到去离子水中,铜前躯体:分子筛:去离子水质量比为0.7/1/2.7。搅拌均匀,在室温下,进行离子交换1-3小时;将悬浊液过滤,得到滤饼后,用去离子水洗涤,再次过滤,洗涤后的滤饼,在130-180℃下干燥3-5小时,在400-600℃焙烧2-3小时,即得到Cu-sapo34分子筛SCR催化剂粉体;
2)将Cu-sapo34分子筛SCR催化剂粉体与粘结剂加入到去离子水中,Cu-sapo34分子筛SCR催化剂粉体:粘结剂:去离子水质量比为2.7/1/3.7;搅拌均匀,形成浆液;然后用球磨工艺处理所述浆液,控制颗粒度D90小于10微米,制得涂层浆液;将载体浸渍该浆液中,浸泡0.5-3分钟后取出,再用压缩空气吹扫0.5-2分钟将载体内部的通道吹通,在130-180℃下干燥3-5小时,在400-600℃焙烧2-3小时,即得到净化柴油车尾气SCR分子筛蜂窝催化剂。
所用的分子筛是sapo34分子筛
所述的粘结剂为乙酸锆。
所述的分子筛负载SCR催化剂的制备方法,优选在150℃下干燥4小时,在500℃焙烧2.5小时。
该分子筛负载SCR催化剂上所发生的选择性催化还原反应的基本原理如下:
NO+O2→NO2(1)
NO2+NH4+→NH4NO2(2)
NH4NO2→N2+H2O(3)
整个反应基本可分为三步:1)氮氧化合物NO和氧气发生氧化反应,生成NO2;2)生成NO2与分子筛上因吸附的NH3而生成的NH4 +离子反应,生成NH4NO2;3)NH4NO2快速发生分解,生成氮气和水。对这个反应来说,反应效率主要取决于第一步氧化反应速率的快慢。以及第二步分子筛催化剂对氨的吸附能力。
本发明所开发的分子筛负载SCR催化剂,从这一SCR反应的反应机理出发,优化设计了催化剂的两个催化活性单元。通过对分子筛负载方式和组分的优化,设计了促进第一步的催化氧化反应的第一活性单元,以及增强了分子筛固体酸性,促进氨吸附能力的第二活性单元。并且有效协调了这两个催化活性单元的有机统一。并且在提高分子筛催化剂的催化活性的同时,还增强了这种分子筛催化剂的高温水热耐久性能。
有益效果:与现有技术相比,本发明分子筛负载SCR催化剂的制备方法,所获得的催化剂通过高温水热老化试验后,催化剂的催化活性可维持在95%以上,而常规的V2O5-WO3/TiO2氧化物催化剂几乎完全失活,一般大孔分子筛SCR催化剂活性也会降低50%以上,本发明具有很好的实用性。
附图说明
图1是产品性能检测结果图。
具体实施方式
下面结合具体实施例对本发明做进一步说明。
实施例1
一种分子筛负载SCR催化剂的制备方法,将铜的前躯体溶液(0.01mol/LCu(NO3)2,0.01mol/LFe(NO3)3,0.01mol/LMn(NO3)2),与分子筛(sapo34)加入到去离子水中,铜前躯体:分子筛:去离子水质量比为0.7/1/2.7。搅拌均匀,在室温下,进行离子交换1-3小时;将悬浊液过滤,得到滤饼后,用去离子水洗涤,再次过滤,洗涤后的滤饼,在130-180℃下干燥3-5小时,在400-600℃焙烧2-3小时,即得到Cu-sapo34分子筛SCR催化剂粉体。
将Cu-sapo34分子筛与粘结剂(乙酸锆)加入到去离子水中,铜分子筛:粘结剂:去离子水质量比为2.7/1/3.7。搅拌均匀,形成浆液;然后用球磨工艺处理所述浆液,控制颗粒度D90小于10微米,制得涂层浆液;将载体浸渍该浆液中,浸泡0.5-3分钟后取出,再用压缩空气吹扫0.5-2分钟将载体内部的通道吹通,在130-180℃下干燥3-5小时,在400-600℃焙烧2-3小时,即得到净化柴油车尾气SCR分子筛蜂窝催化剂。
对产品性能进行检测,结果如图1所示,可见获得的催化剂具有高温活性和水热稳定性。
Claims (4)
1.一种分子筛负载SCR催化剂的制备方法,其特征在于,包括以下步骤:
1)将铜的前躯体溶液与分子筛加入到去离子水中,铜前躯体:分子筛:去离子水质量比为0.7/1/2.7;搅拌均匀,在室温下,进行离子交换1-3小时;将悬浊液过滤,得到滤饼后,用去离子水洗涤,再次过滤,洗涤后的滤饼,在130-180℃下干燥3-5小时,在400-600℃焙烧2-3小时,即得到Cu-sapo34分子筛SCR催化剂粉体;
2)将Cu-sapo34分子筛SCR催化剂粉体与粘结剂加入到去离子水中,Cu-sapo34分子筛SCR催化剂粉体:粘结剂:去离子水质量比为2.7/1/3.7;搅拌均匀,形成浆液;然后用球磨工艺处理所述浆液,控制颗粒度D90小于10微米,制得涂层浆液;将载体浸渍该浆液中,浸泡0.5-3分钟后取出,再用压缩空气吹扫0.5-2分钟将载体内部的通道吹通,在130-180℃下干燥3-5小时,在400-600℃焙烧2-3小时,即得到净化柴油车尾气SCR分子筛蜂窝催化剂。
2.根据权利要求1所述的分子筛负载SCR催化剂的制备方法,其特征在于:所用的分子筛是sapo34分子筛。
3.根据权利要求1所述的分子筛负载SCR催化剂的制备方法,其特征在于,所述的粘结剂为乙酸锆。
4.根据权利要求1所述的分子筛负载SCR催化剂的制备方法,其特征在于,在150℃下干燥4小时,在500℃焙烧2.5小时。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201610133584.9A CN105688980A (zh) | 2016-03-10 | 2016-03-10 | 一种分子筛负载scr催化剂的制备方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201610133584.9A CN105688980A (zh) | 2016-03-10 | 2016-03-10 | 一种分子筛负载scr催化剂的制备方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN105688980A true CN105688980A (zh) | 2016-06-22 |
Family
ID=56220367
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201610133584.9A Pending CN105688980A (zh) | 2016-03-10 | 2016-03-10 | 一种分子筛负载scr催化剂的制备方法 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN105688980A (zh) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2554517A (en) * | 2016-07-22 | 2018-04-04 | Johnson Matthey Plc | Catalyst binders for filter substrates |
CN110681412A (zh) * | 2019-07-17 | 2020-01-14 | 凯龙蓝烽新材料科技有限公司 | 一种耐高温高活性Cu基SCR催化剂及其制备方法 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090196812A1 (en) * | 2008-01-31 | 2009-08-06 | Basf Catalysts Llc | Catalysts, Systems and Methods Utilizing Non-Zeolitic Metal-Containing Molecular Sieves Having the CHA Crystal Structure |
CN101668589A (zh) * | 2007-02-27 | 2010-03-10 | 巴斯福催化剂公司 | 铜cha沸石催化剂 |
CN102513150A (zh) * | 2011-11-14 | 2012-06-27 | 天津大学 | 磷酸硅铝分子筛SCR催化剂和制备及脱除丙烯腈氧化尾气NOx的应用 |
CN103619478A (zh) * | 2011-02-28 | 2014-03-05 | 庄信万丰股份有限公司 | 高温scr催化剂 |
CN105008048A (zh) * | 2013-03-13 | 2015-10-28 | 巴斯夫公司 | 稳定的金属交换的sapo材料 |
-
2016
- 2016-03-10 CN CN201610133584.9A patent/CN105688980A/zh active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101668589A (zh) * | 2007-02-27 | 2010-03-10 | 巴斯福催化剂公司 | 铜cha沸石催化剂 |
US20090196812A1 (en) * | 2008-01-31 | 2009-08-06 | Basf Catalysts Llc | Catalysts, Systems and Methods Utilizing Non-Zeolitic Metal-Containing Molecular Sieves Having the CHA Crystal Structure |
CN103619478A (zh) * | 2011-02-28 | 2014-03-05 | 庄信万丰股份有限公司 | 高温scr催化剂 |
CN102513150A (zh) * | 2011-11-14 | 2012-06-27 | 天津大学 | 磷酸硅铝分子筛SCR催化剂和制备及脱除丙烯腈氧化尾气NOx的应用 |
CN105008048A (zh) * | 2013-03-13 | 2015-10-28 | 巴斯夫公司 | 稳定的金属交换的sapo材料 |
Non-Patent Citations (1)
Title |
---|
XIAO XIANG ET.AL: "Direct Cu2+ ion-exchanged into as-synthesized", 《RSC ADVANCE》 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2554517A (en) * | 2016-07-22 | 2018-04-04 | Johnson Matthey Plc | Catalyst binders for filter substrates |
US10744496B2 (en) | 2016-07-22 | 2020-08-18 | Johnson Matthey Public Limited Company | Catalyst binders for filter substrates |
GB2554517B (en) * | 2016-07-22 | 2021-02-03 | Johnson Matthey Plc | Catalyst binders for filter substrates |
CN110681412A (zh) * | 2019-07-17 | 2020-01-14 | 凯龙蓝烽新材料科技有限公司 | 一种耐高温高活性Cu基SCR催化剂及其制备方法 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
ES2633320T5 (es) | Método y sistema para la purificación de gases de escape procedentes de un motor de combustión interna | |
CN104888806B (zh) | 一种失活钒钛基蜂窝状脱硝催化剂联合脱硝脱汞改性的再生方法 | |
CN104190251A (zh) | 一种空气净化材料及其制备方法和应用 | |
CN107008490B (zh) | 一种净化柴油车尾气的氧化型催化剂及其制备方法 | |
CN103157505A (zh) | 一种Cu-SSZ-13催化剂、制备方法及其用途 | |
CN103212245B (zh) | 一种含有MnO2催化剂的除尘滤料及其制备方法和应用 | |
CN107282141B (zh) | 一种用于舰船烟气脱硫脱硝的光催化剂及其制备方法 | |
CN102335604A (zh) | 具有纳米核壳结构的scr低温脱硝催化剂及其制备方法 | |
CN104923249B (zh) | 一种免煅烧型MnO2‑Fe2O3‑Ce2O3‑CeO2/CNTs低温脱硝催化剂 | |
CN107983338A (zh) | 一种提高钙钛矿型复合金属氧化物催化性能的方法 | |
CN108479788B (zh) | 一种非贵金属负载型催化剂及其制备方法和用途 | |
CN103464177A (zh) | 一种氟掺杂二氧化铈和凹凸棒土的scr脱硝催化剂及其制备方法 | |
CN102513095B (zh) | 一种炭基材料负载铈钨的中温脱硝催化剂及其制备方法 | |
CN107233895B (zh) | 一种机动车尾气净化用氧化催化剂及其制备方法 | |
CN111686716A (zh) | WOx改性碳纳米管负载金属氧化物的低温SCR烟气脱硝催化剂及制备方法与应用 | |
CN103611563A (zh) | 一种scr催化剂及其制备方法 | |
CN110947416A (zh) | 用于nh3-scr的铁/分子筛催化剂及其制备方法和应用 | |
CN105688980A (zh) | 一种分子筛负载scr催化剂的制备方法 | |
CN107649144B (zh) | 一种脱硝催化剂的制备方法 | |
CN103721710B (zh) | 一种负载型Pt催化剂及其制备方法和应用 | |
CN102935362B (zh) | 一种提高粉煤灰-凹凸棒石锰基scr催化剂低温活性的方法 | |
US20240189804A1 (en) | Cu-SAPO-34 CATALYST AND PREPARATION METHOD AND USE THEREOF | |
CN107159230B (zh) | 一种用于常温催化脱除低浓度氮氧化物的催化剂及其制备方法 | |
CN104415745A (zh) | 一种钙钛矿结构物质及其制备方法 | |
CN104415747A (zh) | 一种钛钨粉及其制备方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
RJ01 | Rejection of invention patent application after publication | ||
RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160622 |