CN111841624A - 一种高效amox整体式催化剂的制备方法 - Google Patents
一种高效amox整体式催化剂的制备方法 Download PDFInfo
- Publication number
- CN111841624A CN111841624A CN202010653052.4A CN202010653052A CN111841624A CN 111841624 A CN111841624 A CN 111841624A CN 202010653052 A CN202010653052 A CN 202010653052A CN 111841624 A CN111841624 A CN 111841624A
- Authority
- CN
- China
- Prior art keywords
- powder
- catalyst
- amox
- molecular sieve
- stirring
- 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
- 239000003054 catalyst Substances 0.000 title claims abstract description 63
- LSQZJLSUYDQPKJ-NJBDSQKTSA-N amoxicillin Chemical compound C1([C@@H](N)C(=O)N[C@H]2[C@H]3SC([C@@H](N3C2=O)C(O)=O)(C)C)=CC=C(O)C=C1 LSQZJLSUYDQPKJ-NJBDSQKTSA-N 0.000 title claims abstract description 43
- 238000002360 preparation method Methods 0.000 title claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 65
- 238000000576 coating method Methods 0.000 claims abstract description 46
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 40
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 39
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 39
- 229910001845 yogo sapphire Inorganic materials 0.000 claims abstract description 39
- 239000002808 molecular sieve Substances 0.000 claims abstract description 34
- 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 32
- 239000011248 coating agent Substances 0.000 claims abstract description 30
- 239000002131 composite material Substances 0.000 claims abstract description 29
- 239000003292 glue Substances 0.000 claims abstract description 29
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 28
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 28
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 28
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 28
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 28
- 238000002156 mixing Methods 0.000 claims abstract description 25
- 229910002796 Si–Al Inorganic materials 0.000 claims abstract description 20
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims abstract description 19
- 239000000853 adhesive Substances 0.000 claims abstract description 15
- 230000001070 adhesive effect Effects 0.000 claims abstract description 15
- 238000005342 ion exchange Methods 0.000 claims abstract description 15
- 229910000510 noble metal Inorganic materials 0.000 claims abstract description 6
- 229910018125 Al-Si Inorganic materials 0.000 claims abstract description 3
- 229910018520 Al—Si Inorganic materials 0.000 claims abstract description 3
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000000843 powder Substances 0.000 claims description 99
- 238000003756 stirring Methods 0.000 claims description 59
- 238000010438 heat treatment Methods 0.000 claims description 38
- 239000010949 copper Substances 0.000 claims description 35
- 238000001035 drying Methods 0.000 claims description 31
- 239000008367 deionised water Substances 0.000 claims description 29
- 229910021641 deionized water Inorganic materials 0.000 claims description 29
- 239000002002 slurry Substances 0.000 claims description 24
- 239000007787 solid Substances 0.000 claims description 24
- 230000001276 controlling effect Effects 0.000 claims description 16
- 238000005303 weighing Methods 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 12
- 239000004576 sand Substances 0.000 claims description 11
- 238000007598 dipping method Methods 0.000 claims description 10
- 239000000084 colloidal system Substances 0.000 claims description 9
- 230000009467 reduction Effects 0.000 claims description 9
- 238000005406 washing Methods 0.000 claims description 9
- 230000032683 aging Effects 0.000 claims description 7
- 239000007788 liquid Substances 0.000 claims description 7
- 238000000967 suction filtration Methods 0.000 claims description 7
- OWEGMIWEEQEYGQ-UHFFFAOYSA-N 100676-05-9 Natural products OC1C(O)C(O)C(CO)OC1OCC1C(O)C(O)C(O)C(OC2C(OC(O)C(O)C2O)CO)O1 OWEGMIWEEQEYGQ-UHFFFAOYSA-N 0.000 claims description 6
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 6
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 claims description 6
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 6
- GUBGYTABKSRVRQ-PICCSMPSSA-N Maltose Natural products O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@@H]1O[C@@H]1[C@@H](CO)OC(O)[C@H](O)[C@H]1O GUBGYTABKSRVRQ-PICCSMPSSA-N 0.000 claims description 6
- 230000004048 modification Effects 0.000 claims description 5
- 238000012986 modification Methods 0.000 claims description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 4
- 239000002270 dispersing agent Substances 0.000 claims description 4
- 239000002245 particle Substances 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- 229920002307 Dextran Polymers 0.000 claims description 3
- 229930091371 Fructose Natural products 0.000 claims description 3
- 239000005715 Fructose Substances 0.000 claims description 3
- RFSUNEUAIZKAJO-ARQDHWQXSA-N Fructose Chemical compound OC[C@H]1O[C@](O)(CO)[C@@H](O)[C@@H]1O RFSUNEUAIZKAJO-ARQDHWQXSA-N 0.000 claims description 3
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 claims description 3
- 229930006000 Sucrose Natural products 0.000 claims description 3
- 150000002500 ions Chemical class 0.000 claims description 3
- 239000005720 sucrose Substances 0.000 claims description 3
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 claims description 2
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 2
- 239000002253 acid Substances 0.000 claims description 2
- 150000001298 alcohols Chemical class 0.000 claims description 2
- 239000003513 alkali Substances 0.000 claims description 2
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 claims description 2
- 238000007664 blowing Methods 0.000 claims description 2
- 150000001720 carbohydrates Chemical class 0.000 claims description 2
- 238000005119 centrifugation Methods 0.000 claims description 2
- 150000001879 copper Chemical class 0.000 claims description 2
- XTVVROIMIGLXTD-UHFFFAOYSA-N copper(II) nitrate Chemical compound [Cu+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O XTVVROIMIGLXTD-UHFFFAOYSA-N 0.000 claims description 2
- OPQARKPSCNTWTJ-UHFFFAOYSA-L copper(ii) acetate Chemical compound [Cu+2].CC([O-])=O.CC([O-])=O OPQARKPSCNTWTJ-UHFFFAOYSA-L 0.000 claims description 2
- 238000003618 dip coating Methods 0.000 claims description 2
- 239000012065 filter cake Substances 0.000 claims description 2
- 239000008103 glucose Substances 0.000 claims description 2
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 claims description 2
- FZWBNHMXJMCXLU-BLAUPYHCSA-N isomaltotriose Chemical compound O[C@@H]1[C@@H](O)[C@H](O)[C@@H](CO)O[C@@H]1OC[C@@H]1[C@@H](O)[C@H](O)[C@@H](O)[C@@H](OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O)O1 FZWBNHMXJMCXLU-BLAUPYHCSA-N 0.000 claims description 2
- 150000002632 lipids Chemical class 0.000 claims description 2
- 229910017604 nitric acid Inorganic materials 0.000 claims description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 230000008569 process Effects 0.000 claims description 2
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 claims description 2
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 150000003839 salts Chemical class 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- 239000003381 stabilizer Substances 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 239000010410 layer Substances 0.000 claims 13
- 239000011247 coating layer Substances 0.000 claims 1
- 238000007254 oxidation reaction Methods 0.000 abstract description 8
- 230000003647 oxidation Effects 0.000 abstract description 6
- 229910052878 cordierite Inorganic materials 0.000 abstract description 4
- 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 abstract description 4
- 230000003197 catalytic effect Effects 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 abstract description 2
- 239000007767 bonding agent Substances 0.000 abstract 1
- 239000006185 dispersion Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 16
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 14
- 239000000243 solution Substances 0.000 description 14
- 238000006722 reduction reaction Methods 0.000 description 9
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical group N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000011282 treatment Methods 0.000 description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 3
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 1
- ODUCDPQEXGNKDN-UHFFFAOYSA-N Nitrogen oxide(NO) Natural products O=N ODUCDPQEXGNKDN-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000011269 treatment regimen Methods 0.000 description 1
Images
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
- B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
- B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
- B01J29/80—Mixtures of different zeolites
-
- 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
- B01J29/005—Mixtures of molecular sieves comprising at least one molecular sieve which is not an aluminosilicate zeolite, e.g. from groups B01J29/03 - B01J29/049 or B01J29/82 - B01J29/89
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
-
- 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
- B01J29/40—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively
- B01J29/42—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively containing iron group metals, noble metals or copper
- B01J29/46—Iron group metals or copper
-
- 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
- B01J29/70—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
- B01J29/72—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65 containing iron group metals, noble metals or copper
- B01J29/76—Iron group metals or copper
-
- 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
- B01J29/70—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
- B01J29/72—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65 containing iron group metals, noble metals or copper
- B01J29/76—Iron group metals or copper
- B01J29/7615—Zeolite Beta
-
- 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
- B01J29/70—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
- B01J29/72—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65 containing iron group metals, noble metals or copper
- B01J29/76—Iron group metals or copper
- B01J29/763—CHA-type, e.g. Chabazite, LZ-218
-
- 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]
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
- F01N2570/14—Nitrogen oxides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
- F01N2570/18—Ammonia
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Catalysts (AREA)
Abstract
本发明涉及一种应用于汽车尾气后处理的AMOX催化剂及其制备方法,通过采用分段涂覆、Ce‑分子筛‑SiO2改性Al2O3、糖分散贵金属、自制高分散Si‑Al复合胶、较高温水浴、调节pH值的方法进行催化剂制备,显著提高了AMOX催化剂的NH3氧化能力和低NOx催化性能,同时具有非常优异的N2选择性,并且自制的Al‑Si复合胶作为粘接剂,可以显著提高了堇青石整体式催化剂的附着力。该制备方法首先将CeO2、SiO2、Al2O3和分子筛按照比例混合,分散砂磨后,通过糖分散贵金属,缓慢滴入贵金属,涂覆后制备底层氧化层。随后通过离子交换,制备Si‑Al复合胶,按比例混合后,涂覆制备上层SCR层。本发明合提供一种最优的Fe‑β分子筛离子交换技术,同时制备出具有较高附着力,具有优异催化剂催化性能的Fe‑SCR堇青石整体式催化剂。本发明提供一种高效AMOX整体式催化剂的制备方法,同时制备出具有非常高效的NH3捕集氧化能力,且可以满足欧六排放法规要求,具有非常优异性能的AMOX催化剂。
Description
技术领域
本发明属于工业催化领域,特别是涉及一种高效AMOX整体式催化剂的制备方法。
背景技术
柴油机SCR尾气后处理,是针对在废气中的一氧化碳(CO)、碳氢化合物(HC)及颗粒(PM)等排放物得到有效控制并达到法规的要求,最后对发动机排出尾气中含量较高的氮氧化物(NOX)再利用专门的车载后处理系统进行处理的一种尾气处理策略,其中NOx的净化技术是用到选择性催化还原法。选择性催化还原法(Selective Catalytic Reduction,SCR)的原理是在催化剂作用下,还原剂NH3在200-600℃下有选择的将NO和NO2还原成N2,而几乎不发生NH3与O2的氧化反应。目前常见的SCR催化剂有V-W-Ti、Cu-SCR、Fe-SCR,还原剂为NH3。随着排放法规的日趋严苛,NOx排放值越来越低,且允许NH3泄露值也严格起来。由于国五标准要求SCR催化剂更高的转化效率,同时也就需要更高的尿素喷射量,从而容易造成多余NH3逸出,所以需要在后端加装氨捕集催化剂,即AMOX催化剂。
目前汽车尾气后处理行业,针对NH3泄露问题,常见两种方案,第一种是在SCR后端添加一块1~2英寸长的AMOX催化剂,这种催化剂不仅易导致NOx排放值得超标,而且还额外增加封装体积。另一种是底层涂覆贵金属涂层,上层涂覆SCR层,这种方案的优点在于可以有效节省空间,但低的NH3捕集效率、存在NOx超标、且涂覆工艺复杂等问题,仍限值其大规模应用。因此,如何保证同时降低NH3的泄露值和NOx的排放,且具有简单的制备工艺,在当下国六马上实施的时期,具有非常重大的战略意义。
本发明的目的是提供一种高效AMOX整体式催化剂的制备方法,同时制备出具有非常高效的NH3捕集氧化能力,且可以满足欧六排放法规要求,具有非常优异性能的AMOX催化剂。
发明内容
本发明针对AMOX催化剂的NH3捕集效率差、存在NOx超标,且涂覆工艺复杂等问题,提供了一种不仅具有提高NH3捕集效率和NOx处理效率,且涂覆工艺简单,且具有很高催化剂附着力的催化剂制备方法。
一种高效AMOX整体式催化剂的制备方法,催化剂分为两层涂覆,具体包括以下步骤:
(1)底层NH3氧化层制备
a,按固体含量为30-45%,分别计算粉体用量,Al2O3粉末占粉体总质量的40-80%,SiO2粉末占粉体总质量的0-50%,CeO2粉末占粉体总质量的10-50%,HBEA分子筛占粉体总质量的5-45%;
b,称取Al2O3粉末40-60g和SiO2粉末0-30g加入去100g离子水中,搅拌20-60min;
c,称取CeO2粉末10-50g和HBEA 5-15g加入步骤b搅拌好的浆液中,继续搅拌20-60min;
d,将步骤c搅拌均匀的浆液加入砂磨机中,砂磨5-60min,磨至颗粒度为5-15μm;
e,取出浆液,调节固含量至25-45%;
f,配制1-5%麦芽糖溶液约5-50g,缓慢滴加Pt溶液,Pt含量0.5-8g/ft3;
g,采用浸渍法涂覆底层氧化层,控制涂覆量30-100g/L;
h,120℃烘干20-120min,400-650℃焙烧20-180min后,得到底层NH3氧化层;
(2)上层SCR还原层制备
a,将Cu源同去离子水混合,并搅拌均匀,水浴加热至20-60℃,待Cu源完全溶解,然后按Cu/分子筛重量比为0.1-0.6加入分子筛,继续升温至70-90℃,均匀搅拌0.5-2h;
b,离子交换完成后,将交换液冷却后,通过抽滤机中进行抽滤,洗涤,待抽出液呈无色后,将滤饼放入100-120℃烘箱干燥;
c,干燥后,以2-8℃/min的速度升温至400-600℃,保温1-3h,随炉冷却待用;
d,将纳米Al2O3粉30-50g在去离子水中充分搅拌,然后缓慢加入浓度为1-5%HNO3溶液,待纳米Al2O3粉胶溶后,水浴升温至40-60℃,保温60min,得到纳米Al2O3胶体;
e,将纳米SiO2粉末30-50g缓慢加入纳米Al2O3胶体中,匀速搅拌,并调节pH值至2.5-4,水浴加热至65-90℃,保温2-5h,陈化1-2d后得到Si-Al复合胶作为粘接剂备用;
f,将分子筛粉碎后,加入去离子水,调节固含量25-45%,搅拌20-60min;
g,向上述分子筛溶液中添加1-8%的Si-Al复合胶,搅拌20-60min,调节粘度至500-2000cp;
h,采用定量涂覆法制备AMOX催化剂,控制涂覆量30-200g/L;
i,110-160℃快速烘干后,升温至300-600℃焙烧1-3h后,得到AMOX催化剂。
在上述步骤中,CeO2可以替换为Ce(NO3)2、Ce(CH3COO)2中的至少一种;在底层Al2O3和SiO2添加中,可以是两种不同的粉体添加,也可以是通过改性后制备的复合粉体,也可以是通过其他元素进行的改性复合粉体或单一粉体;在底层添加的CeO2,可以是单一粉体,也可以是通过改性后制备的复合粉体;在底层添加的贵金属分散剂麦芽糖,可以替换成果糖、葡聚糖、蔗糖、葡萄糖等糖类,也可以是乙二醇、丙醇、聚乙烯醇等醇类,也可以是乙酸乙酯、乙酸丁酯等脂类。
上层SCR涂层离子交换投加比例为Cu/分子筛为0.1-0.6,比例可以是摩尔比也可以换算成质量比,水浴温度为70-85℃;所使用的粘接剂为Al-Si复合胶,Al/Si的质量比为1-9,pH值为2.5-6,水浴温度为60-90℃;对上层SCR层Si-Al复合胶制备安定剂,不仅限于HNO3,也可以是乙酸、盐酸等酸溶液,也可以是通过NH3水等碱溶液调节的碱性Si-Al复合胶;对上层SCR层Si-Al复合胶,也可以是通过分散剂制备的公平衡状态Si-Al复合胶,也可以是通过Si胶和Al胶按一定比例直接复合的混合胶体;Cu盐可以是乙酸铜、硝酸铜等铜盐,也可以纳米Cu离子、纳米Cu颗粒,也可以是Cu氧化物,Cu单质等。
对NH3氧化层原料进行降低粒度的方法,不仅限于砂磨机,也可以是球磨机、水磨机等。
对Al2O3、CeO2、SiO2和去离子水等原料添加不限于步骤(1)中顺序;对Cu源、分子筛、纳米Al2O3及SiO2等原料添加不限于步骤(2)中顺序。
分子筛可以是CHA型,也可以是BEA、MFI、FAU、CFI等分子筛。
在Cu-分子筛离子交换结束后所得分子筛也可以用压滤、离心、喷雾、洗涤等方法。
AMOX整体式催化剂涂覆方法不限于定量涂覆法,也可以是浸渍提拉法,浸渍专机,抽涂专机,吹扫专机等涂覆方法。
在溶胶水浴加热采用程序升温过程,升温速率范围为0.3~10℃/min,水浴温度为70-85℃
本发明解决了Fe-β分子筛离子交换量低,堇青石整体式催化剂附着力差等问题,提供了一种可以提高离子交换量的交换参数,并提供了一种可以有效提高整体式催化剂附着力的方法,所得Fe-SCR堇青石整体式催化剂附着力高,同时可以显著提高催化剂低温催化性能。
附图说明
附图1实施例1所得AMOX催化剂NH3氧化能力对比。
附图2实施例1所得AMOX催化剂NOx生产量对比。
附图3实施例1所得AMOX催化剂N2选择性对比。
具体实施方式
实施例1
(1)底层NH3氧化层制备
a,按固体含量为45%,分别计算粉体用量,Al2O3粉末占60%,SiO2粉末占15%,CeO2粉末占10%,HBEA分子筛占15%;
b,称取Al2O3粉末60g和SiO2粉末15g加入去122g离子水中,搅拌30min;
c,称取CeO2粉末10g和HBEA 15g加入搅拌好的浆液中,继续搅拌30min;
d,将搅拌均匀的浆液加入砂磨机中,砂磨60min,磨至颗粒度为8μm;
e,取出浆液,调节固含量至40%;
f,配制1-5%麦芽糖溶液约5g,缓慢滴加Pt溶液,Pt含量2g/ft3;
g,采用浸渍法涂覆底层氧化层,控制涂覆量50g/L;
h,120℃烘干120min,500℃焙烧60min。
(2)上层SCR还原层制备
a,将Cu(NO3)2同去离子水混合,并搅拌均匀,水浴加热至40℃,待Cu源完全溶解,然后按Cu/分子筛比为0.5加入H-SSZ13,继续升温至80℃,均匀搅拌2h;
b,离子交换完成后,将交换液冷却后,通过抽滤机中进行抽滤,洗涤,待抽出液呈无色后放入120℃烘箱干燥。
c,干燥后,以5℃/min的速度升温至500℃,保温1h,随炉冷却待用。
d,将纳米Al2O3粉30g在去离子水中充分搅拌,然后缓慢加入浓度为1%HNO3溶液,纳米Al2O3粉胶溶后,水浴升温至60℃,保温60min。
e,将纳米SiO2粉末30g缓慢加入纳米Al2O3胶体中,匀速搅拌,并调节pH值至2.5,水浴加热至90℃,保温2h,陈化1d后作为粘接剂备用。
f,将分子筛粉碎后,加入去离子水,调节固含量35%,搅拌20min。
g,添加3%的Si-Al复合胶,搅拌60min,调节粘度至1500cp。
h,采用定量涂覆法制备AMOX催化剂,控制涂覆量100g/L;
i,110℃快速烘干后,升温至400℃焙烧3h。
对比案例1
(1)底层NH3氧化层制备
a,按固体含量为35%,分别计算粉体用量,Al2O3粉末占90%,CeO2粉体占10%。
b,称取Al2O3粉末90g和CeO2粉末10g加入去160g离子水中,搅拌30min;
c,将搅拌均匀的浆液加入砂磨机中,砂磨30min,磨至颗粒度为8μm;
d,取出浆液,调节固含量至32%;
e,缓慢滴加Pt溶液,Pt含量2g/ft3,调节pH=5;
f,采用浸渍法涂覆底层氧化层,控制涂覆量50g/L;
g,120℃烘干120min,500℃焙烧60min。
(2)上层SCR还原层制备
a,将Cu(NO3)2同去离子水混合,并搅拌均匀,加入乙醇溶液,水浴加热至40℃,待Cu源完全溶解,均匀搅拌30min;
b,然后按Cu/CHA比为0.5加入H-SSZ13,继续搅拌60min。
c,将浆液通入砂磨机中,砂磨20min,磨至颗粒度为8μm;
d,取出浆液,调节固含量至32%;
e,添加3%的Al胶,搅拌60min,调节粘度至1000cp。
f,采用定量涂覆法制备AMOX催化剂,控制涂覆量100g/L;
g,110℃快速烘干后,升温至400℃焙烧3h。
附图1为对比例方法制备AMOX催化剂和本发明制备的AMOX催化剂NH3氧化能力的对比,可以本发明制备的AMOX催化剂,具有非常优异的NH3氧化能力,比常规催化剂低温起燃温度,高出20℃左右。
附图2为对比例方法制备AMOX催化剂和本发明制备的AMOX催化剂NOx生成能力的对比,可以本发明制备的AMOX催化剂,具有非常低的NOx生成量,满足日趋严格的排放法规要求。
附图3为对比例方法制备AMOX催化剂和本发明制备的AMOX催化剂N2选择性的对比,可以明显看出,本发明制备的催化剂,具有非常优异的N2选择性,副产物N2O生成量最低。
实施例2
(1)底层NH3氧化层制备
a,按固体含量为35%,分别计算粉体用量,Al2O3粉末占70%,SiO2粉末占10%,CeO2粉末占10%,HBEA分子筛占10%;
b,称取Al2O3粉末70g和SiO2粉末10g加入去185g离子水中,搅拌20min;
c,称取CeO2粉末10g和HBEA 10g加入搅拌好的浆液中,继续搅拌20min;
d,将搅拌均匀的浆液加入砂磨机中,砂磨5min,磨至颗粒度为12μm;
e,取出浆液,调节固含量至30%;
f,配制2%麦芽糖约10g,缓慢滴加Pt溶液,Pt含量3g/ft3;
g,采用浸渍法涂覆底层氧化层,控制涂覆量30g/L;
h,120℃烘干80min,450℃焙烧80min。
(2)上层SCR还原层制备
a,将Cu(CH3COO)2同去离子水混合,并搅拌均匀,水浴加热至40℃,待Cu源完全溶解,然后按Cu/CHA比为0.2加入H-SSZ13,继续升温至70℃,均匀搅拌0.5h;
b,离子交换完成后,将交换液冷却后,通过抽滤机中进行抽滤,洗涤,待抽出液呈无色后放入100℃烘箱干燥。
c,干燥后,以8℃/min的速度升温至600℃,保温1h,随炉冷却待用。
d,将纳米Al2O3粉50g在去离子水中充分搅拌,然后缓慢加入浓度为2%HNO3,纳米Al2O3粉胶溶后,水浴升温至40℃,保温60min。
e,将纳米SiO2粉末40g缓慢加入纳米Al2O3胶体中,匀速搅拌,并调节pH值至4,水浴加热至65℃,保温5h,陈化2d后作为粘接剂备用。
f,将分子筛粉碎后,加入去离子水,调节固含量45%,搅拌60min。
g,添加2%的Si-Al复合胶,搅拌50min,调节粘度至1000cp。
h,采用定量涂覆法制备AMOX催化剂,控制涂覆量30g/L;
i,110℃快速烘干后,升温至300℃焙烧1h。
实施例3
(1)底层NH3氧化层制备
a,按固体含量为38%,分别计算粉体用量,Al2O3粉末占80%,SiO2粉末占5%,CeO2粉末占10%,HBEA分子筛占5%;
b,称取Al2O3粉末80g和SiO2粉末5g加入去150g离子水中,搅拌30min;
c,称取CeO2粉末10g和HBEA 5g加入搅拌好的浆液中,继续搅拌30min;
d,将搅拌均匀的浆液加入砂磨机中,砂磨40min,磨至颗粒度为9μm;
e,取出浆液,调节固含量至38%;
f,配制1-5%果糖约6g,缓慢滴加Pt溶液,Pt含量0.5g/ft3;
g,采用浸渍法涂覆底层氧化层,控制涂覆量30g/L;
h,120℃烘干120min,450℃焙烧180min。
(2)上层SCR还原层制备
a,将纳米Cu离子同去离子水混合,并搅拌均匀,水浴加热至50℃,待Cu源完全分散均匀,然后按Cu/CHA比为0.6加入H-BEA,继续升温至90℃,均匀搅拌1h;
b,离子交换完成后,将交换液冷却后,通过抽滤机中进行抽滤,洗涤,待抽出液呈无色后放入110℃烘箱干燥。
c,干燥后,以5℃/min的速度升温至400℃,保温2h,随炉冷却待用。
d,将纳米Al2O3粉40g在去离子水中充分搅拌,然后缓慢加入浓度为5%HNO3,纳米Al2O3粉胶溶后,水浴升温至50℃,保温60min。
e,将纳米SiO2粉末30g缓慢加入纳米Al2O3胶体中,匀速搅拌,并调节pH值至4,水浴加热至90℃,保温5h,陈化2d后作为粘接剂备用。
f,将分子筛粉碎后,加入去离子水,调节固含量37%,搅拌20min。
g,添加8%的Si-Al复合胶,搅拌20min,调节粘度至500cp。
h,采用定量涂覆法制备AMOX催化剂,控制涂覆量200g/L;
i,160℃快速烘干后,升温至600℃焙烧3h。
实施例4
(1)底层NH3氧化层制备
a,按固体含量为30%,分别计算粉体用量,Al2O3粉末占40%,SiO2粉末占40%,CeO2粉末占10%,HBEA分子筛占10%;
b,称取Al2O3粉末40g和SiO2粉末40g加入去220g离子水中,搅拌60min;
c,称取CeO2粉末10g和HBEA 10g加入搅拌好的浆液中,继续搅拌20min;
d,将搅拌均匀的浆液加入砂磨机中,砂磨60min,磨至颗粒度为5μm;
e,取出浆液,调节固含量至30%;
f,配制5%蔗糖约50g,缓慢滴加Pt溶液,Pt含量8g/ft3;
g,采用浸渍法涂覆底层氧化层,控制涂覆量100g/L;
h,120℃烘干20-120min,400-650℃焙烧20-180min。
(2)上层SCR还原层制备
a,将Cu(NO3)2同去离子水混合,并搅拌均匀,水浴加热至40℃,待Cu源完全溶解,然后按Cu/CHA比为0.6加入H-ZSM-5,继续升温至70℃,均匀搅拌0.5h;
b,离子交换完成后,将交换液冷却后,通过抽滤机中进行抽滤,洗涤,待抽出液呈无色后放入120℃烘箱干燥。
c,干燥后,以2℃/min的速度升温至400℃,保温1h,随炉冷却待用。
d,将纳米Al2O3粉30g在去离子水中充分搅拌,然后缓慢加入浓度为1%HNO3,纳米Al2O3粉胶溶后,水浴升温至40℃,保温60min。
e,将纳米SiO2粉末30-50g缓慢加入纳米Al2O3胶体中,匀速搅拌,并调节PH值至2.5,水浴加热至65℃,保温2h,陈化1d后作为粘接剂备用。
f,将分子筛粉碎后,加入去离子水,调节固含量25%,搅拌50min。
g,添加1%的Si-Al复合胶,搅拌60min,调节粘度至2000cp。
h,采用定量涂覆法制备AMOX催化剂,控制涂覆量90g/L;
i,150℃快速烘干后,升温至600℃焙烧1h。
实施例5
(1)底层NH3氧化层制备
a,按固体含量为45%,分别计算粉体用量,Al2O3粉末占40%,SiO2粉末占40%,CeO2粉末占10%,HBEA分子筛占10%;
b,称取Al2O3粉末40g和SiO2粉末40g加入去100g离子水中,搅拌30min;
c,称取CeO2粉末10g和HBEA 10g加入搅拌好的浆液中,继续搅拌30min;
d,将搅拌均匀的浆液加入砂磨机中,砂磨50min,磨至颗粒度为6μm;
e,取出浆液,调节固含量至37%;
f,配制5%葡聚糖约10g,缓慢滴加Pt溶液,Pt含量5g/ft3;
g,采用浸渍法涂覆底层氧化层,控制涂覆量80g/L;
h,120℃烘干100min,450℃焙烧150min。
(2)上层SCR还原层制备
a,将纳米Cu源同去离子水混合,并搅拌均匀,水浴加热至40℃,待Cu源完全溶解,然后按Cu/SAPO34比为0.3加入H-SAPO34,继续升温至80℃,均匀搅拌1h;
b,离子交换完成后,将交换液冷却后,通过抽滤机中进行抽滤,洗涤,待抽出液呈无色后放入100℃烘箱干燥。
c,干燥后,以6℃/min的速度升温至500℃,保温2h,随炉冷却待用。
d,将纳米Al2O3粉35g在去离子水中充分搅拌,然后缓慢加入浓度为2%HAC,纳米Al2O3粉胶溶后,水浴升温至50℃,保温60min。
e,将纳米SiO2粉末30g缓慢加入纳米Al2O3胶体中,匀速搅拌,并调节pH值至3.5,水浴加热至65℃,保温3h,陈化2d后作为粘接剂备用。
f,将分子筛粉碎后,加入去离子水,调节固含量30%,搅拌30min。
g,添加2%的Si-Al复合胶,搅拌30min,调节粘度至600cp。
h,采用定量涂覆法制备AMOX催化剂,控制涂覆量150g/L。
本发明不限于上述实施例,凡依据本发明的技术实质对上述实施例作的任何简单、等同变化或修饰,均属于本发明技术范围内。
Claims (9)
1.一种高效AMOX整体式催化剂的制备方法,其特征在于,催化剂分为两层涂覆,具体包括以下步骤:
(1)底层NH3氧化层制备
a,按固体含量为30-45%,分别计算粉体用量,Al2O3粉末占粉体总质量的40-80%,SiO2粉末占粉体总质量的0-50%,CeO2粉末占粉体总质量的10-50%,HBEA分子筛占粉体总质量的5-45%;
b,称取Al2O3粉末40-60g和SiO2粉末0-30g加入去100g离子水中,搅拌20-60min;
c,称取CeO2粉末10-50g和HBEA 5-15g加入步骤b搅拌好的浆液中,继续搅拌20-60min;
d,将步骤c搅拌均匀的浆液加入砂磨机中,砂磨5-60min,磨至颗粒度为5-15μm;
e,取出浆液,调节固含量至25-45%;
f,配制1-5%麦芽糖溶液约5-50g,缓慢滴加Pt溶液,Pt含量0.5-8g/ft3;
g,采用浸渍法涂覆底层氧化层,控制涂覆量30-100g/L;
h,120℃烘干20-120min,400-650℃焙烧20-180min后,得到底层NH3氧化层;
(2)上层SCR还原层制备
a,将Cu源同去离子水混合,并搅拌均匀,水浴加热至20-60℃,待Cu源完全溶解,然后按Cu/分子筛重量比为0.1-0.6加入分子筛,继续升温至70-90℃,均匀搅拌0.5-2h;
b,离子交换完成后,将交换液冷却后,通过抽滤机中进行抽滤,洗涤,待抽出液呈无色后,将滤饼放入100-120℃烘箱干燥;
c,干燥后,以2-8℃/min的速度升温至400-600℃,保温1-3h,随炉冷却待用;
d,将纳米Al2O3粉30-50g在去离子水中充分搅拌,然后缓慢加入浓度为1-5%HNO3溶液,待纳米Al2O3粉胶溶后,水浴升温至40-60℃,保温60min,得到纳米Al2O3胶体;
e,将纳米SiO2粉末30-50g缓慢加入纳米Al2O3胶体中,匀速搅拌,并调节pH值至2.5-4,水浴加热至65-90℃,保温2-5h,陈化1-2d后得到Si-Al复合胶作为粘接剂备用;
f,将分子筛粉碎后,加入去离子水,调节固含量25-45%,搅拌20-60min;
g,向上述分子筛溶液中添加1-8%的Si-Al复合胶,搅拌20-60min,调节粘度至500-2000cp;
h,采用定量涂覆法制备AMOX催化剂,控制涂覆量30-200g/L;
i,110-160℃快速烘干后,升温至300-600℃焙烧1-3h后,得到AMOX催化剂。
2.根据权利要求1所述的一种高效AMOX整体式催化剂的制备方法,其特征在于CeO2可以替换为Ce(NO3)2、Ce(CH3COO)2中的至少一种;在底层Al2O3和SiO2添加中,可以是两种不同的粉体添加,也可以是通过改性后制备的复合粉体,也可以是通过其他元素进行的改性复合粉体或单一粉体;在底层添加的CeO2,可以是单一粉体,也可以是通过改性后制备的复合粉体;在底层添加的贵金属分散剂麦芽糖,可以替换成果糖、葡聚糖、蔗糖、葡萄糖等糖类,也可以是乙二醇、丙醇、聚乙烯醇等醇类,也可以是乙酸乙酯、乙酸丁酯等脂类。
3.根据权利要求1所述的一种高效AMOX整体式催化剂的制备方法,其特征在于上层SCR涂层离子交换投加比例为Cu/分子筛为0.1-0.6,比例可以是摩尔比也可以换算成质量比,水浴温度为70-85℃;所使用的粘接剂为Al-Si复合胶,Al/Si的质量比为1-9,pH值为2.5-6,水浴温度为60-90℃;对上层SCR层Si-Al复合胶制备安定剂,不仅限于HNO3,也可以是乙酸、盐酸等酸溶液,也可以是通过NH3水等碱溶液调节的碱性Si-Al复合胶;对上层SCR层Si-Al复合胶,也可以是通过分散剂制备的公平衡状态Si-Al复合胶,也可以是通过Si胶和Al胶按一定比例直接复合的混合胶体;Cu盐可以是乙酸铜、硝酸铜等铜盐,也可以纳米Cu离子、纳米Cu颗粒,也可以是Cu氧化物,Cu单质等。
4.根据权利要求1所述的一种高效AMOX整体式催化剂的制备方法,其特征在于对NH3氧化层原料进行降低粒度的方法,不仅限于砂磨机,也可以是球磨机、水磨机等。
5.根据权利要求1所述的一种高效AMOX整体式催化剂的制备方法,其特征在于对Al2O3、CeO2、SiO2和去离子水等原料添加不限于步骤(1)中顺序;对Cu源、分子筛、纳米Al2O3及SiO2等原料添加不限于步骤(2)中顺序。
6.根据权利要求1所述的一种高效AMOX整体式催化剂的制备方法,其特征在于,分子筛可以是CHA型,也可以是BEA、MFI、FAU、CFI等分子筛。
7.根据权利要求1所述的一种高效AMOX整体式催化剂的制备方法,其特征在于在Cu-分子筛离子交换结束后所得分子筛也可以用压滤、离心、喷雾、洗涤等方法。
8.根据权利要求1所述的一种高效AMOX整体式催化剂的制备方法,其特征在于AMOX整体式催化剂涂覆方法不限于定量涂覆法,也可以是浸渍提拉法,浸渍专机,抽涂专机,吹扫专机等涂覆方法。
9.根据权利要求1所述的一种高效AMOX整体式催化剂的制备方法,其特征在于在溶胶水浴加热采用程序升温过程,升温速率范围为0.3~10℃/min,水浴温度为70-85℃。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202010653052.4A CN111841624A (zh) | 2020-07-08 | 2020-07-08 | 一种高效amox整体式催化剂的制备方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202010653052.4A CN111841624A (zh) | 2020-07-08 | 2020-07-08 | 一种高效amox整体式催化剂的制备方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN111841624A true CN111841624A (zh) | 2020-10-30 |
Family
ID=73153156
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202010653052.4A Pending CN111841624A (zh) | 2020-07-08 | 2020-07-08 | 一种高效amox整体式催化剂的制备方法 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN111841624A (zh) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140044635A1 (en) * | 2011-03-31 | 2014-02-13 | N.E. Chemcat Corporation | Ammonia oxidation catalyst, exhaust gas purification device using same, and exhaust gas purification method |
US20140065044A1 (en) * | 2011-03-31 | 2014-03-06 | N.E. Chemcat Corporation | Ammonia oxidation catalyst, exhaust gas purification device using same, and exhaust gas purification method |
CN105413740A (zh) * | 2015-11-06 | 2016-03-23 | 无锡威孚环保催化剂有限公司 | 高效Fe-SCR整体式催化剂的制备方法 |
CN106268929A (zh) * | 2016-07-21 | 2017-01-04 | 无锡威孚环保催化剂有限公司 | Cha分子筛scr整体式催化剂的制备方法 |
CN107519920A (zh) * | 2017-08-22 | 2017-12-29 | 无锡威孚环保催化剂有限公司 | 旋蒸法负载铜制备Cu‑SSZ‑13分子筛催化剂的方法 |
CN110102338A (zh) * | 2019-04-30 | 2019-08-09 | 昆明贵研催化剂有限责任公司 | 一种高氮气选择性的氨氧化催化剂及其制备方法 |
-
2020
- 2020-07-08 CN CN202010653052.4A patent/CN111841624A/zh active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140044635A1 (en) * | 2011-03-31 | 2014-02-13 | N.E. Chemcat Corporation | Ammonia oxidation catalyst, exhaust gas purification device using same, and exhaust gas purification method |
US20140065044A1 (en) * | 2011-03-31 | 2014-03-06 | N.E. Chemcat Corporation | Ammonia oxidation catalyst, exhaust gas purification device using same, and exhaust gas purification method |
CN105413740A (zh) * | 2015-11-06 | 2016-03-23 | 无锡威孚环保催化剂有限公司 | 高效Fe-SCR整体式催化剂的制备方法 |
CN106268929A (zh) * | 2016-07-21 | 2017-01-04 | 无锡威孚环保催化剂有限公司 | Cha分子筛scr整体式催化剂的制备方法 |
CN107519920A (zh) * | 2017-08-22 | 2017-12-29 | 无锡威孚环保催化剂有限公司 | 旋蒸法负载铜制备Cu‑SSZ‑13分子筛催化剂的方法 |
CN110102338A (zh) * | 2019-04-30 | 2019-08-09 | 昆明贵研催化剂有限责任公司 | 一种高氮气选择性的氨氧化催化剂及其制备方法 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN109985660B (zh) | 一种一步法合成铁基分子筛催化剂的方法及其应用 | |
WO2020063360A1 (zh) | 一种分子筛scr催化剂制备方法及其制备的催化剂 | |
CN104549529B (zh) | 一种高牢固度蜂窝陶瓷载体及其制备方法 | |
CN105688974A (zh) | 一种以SBA-15/TiO2为载体的脱硝催化剂及其制备方法 | |
CN105214647B (zh) | 通过浆液浸渍法制备涂层式V2O5‑WO3‑TiO2‑SiO2催化剂的方法 | |
CN103007923A (zh) | 一种scr脱硝催化剂及其制备方法 | |
CN102962057B (zh) | 蜂窝陶瓷上涂覆Ti基脱硝催化剂的方法 | |
CN111229305B (zh) | 一种钼改性的Fe-ZSM5分子筛催化剂及制备方法与应用 | |
CN102039205A (zh) | 整体式氮氧化物选择性还原催化剂及其制备方法 | |
CN112403459B (zh) | 一种基于金属相变微胶囊的低温scr催化剂及其制备方法 | |
CN109126768A (zh) | 柴油车用钒钨钛氧化物负载纤维的整体式催化剂及其制备方法 | |
CN113600188B (zh) | 一种汽油车尾气净化催化剂及其制备方法 | |
CN105363486B (zh) | 一种分子筛基scr催化剂的制备方法 | |
CN114632537A (zh) | 一种整体式脱硝催化剂及其制备方法与应用 | |
CN109675619B (zh) | 一种制备过程中控制分子筛基scr催化剂活性温度窗口的方法 | |
CN102658184A (zh) | 一种以蜂窝状金属合金为载体的尿素选择分解催化剂及制备方法 | |
CN105879869A (zh) | 一种用于氢气选择性还原氮氧化物的催化剂及其制备方法和应用 | |
CN111841624A (zh) | 一种高效amox整体式催化剂的制备方法 | |
CN112934234A (zh) | 一种用于柴油尾气后处理系统中的doc催化剂 | |
CN116139861B (zh) | 适用于燃气轮机氮氧化物储存还原的催化剂及其制备和应用 | |
CN110479356A (zh) | 一种纳米Cu原位浸渍的Cu-分子筛SCR整体催化剂及其制备方法 | |
CN115608356A (zh) | 用于废气处理应用的阴离子pgm羧酸盐辅助的pgm纳米颗粒合成 | |
CN114904570A (zh) | 一种应用柴油机高氮气选择性氨氧化催化剂及其制备方法 | |
CN113751082A (zh) | 一种非贵金属sdpf双涂层催化剂的涂覆方法 | |
CN110180539A (zh) | 一种汽车尾气三元催化剂涂层材料及其制备工艺 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for 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: 20201030 |