DK180289B1 - Monolithic honeycomb oxidation catalyst and process for its preparation - Google Patents
Monolithic honeycomb oxidation catalyst and process for its preparation Download PDFInfo
- Publication number
- DK180289B1 DK180289B1 DKPA201600583A DKPA201600583A DK180289B1 DK 180289 B1 DK180289 B1 DK 180289B1 DK PA201600583 A DKPA201600583 A DK PA201600583A DK PA201600583 A DKPA201600583 A DK PA201600583A DK 180289 B1 DK180289 B1 DK 180289B1
- Authority
- DK
- Denmark
- Prior art keywords
- monolithic honeycomb
- group
- inert
- washcoat
- vanadium pentoxide
- Prior art date
Links
- 239000003054 catalyst Substances 0.000 title claims abstract description 33
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 19
- 230000003647 oxidation Effects 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title abstract description 3
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 claims abstract description 18
- 229910052751 metal Inorganic materials 0.000 claims abstract description 16
- 239000002184 metal Substances 0.000 claims abstract description 16
- 239000012792 core layer Substances 0.000 claims abstract description 15
- 239000004927 clay Substances 0.000 claims abstract description 13
- 239000010410 layer Substances 0.000 claims abstract description 10
- -1 platinum group metals Chemical class 0.000 claims abstract description 6
- 239000000758 substrate Substances 0.000 claims description 27
- 239000002002 slurry Substances 0.000 claims description 15
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 14
- 238000000576 coating method Methods 0.000 claims description 7
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 6
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 6
- 229910052763 palladium Inorganic materials 0.000 claims description 6
- 239000002243 precursor Substances 0.000 claims description 6
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 5
- OLEWMKVPSUCNLG-UHFFFAOYSA-N 4-methylthioamphetamine Chemical class CSC1=CC=C(CC(C)N)C=C1 OLEWMKVPSUCNLG-UHFFFAOYSA-N 0.000 claims description 4
- 239000005995 Aluminium silicate Substances 0.000 claims description 4
- 235000012211 aluminium silicate Nutrition 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 4
- 239000003365 glass fiber Substances 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000000440 bentonite Substances 0.000 claims description 3
- 229910000278 bentonite Inorganic materials 0.000 claims description 3
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims description 3
- 238000001354 calcination Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 239000010937 tungsten Substances 0.000 claims description 3
- 229910052619 chlorite group Inorganic materials 0.000 claims description 2
- QBWCMBCROVPCKQ-UHFFFAOYSA-N chlorous acid Chemical group OCl=O QBWCMBCROVPCKQ-UHFFFAOYSA-N 0.000 claims description 2
- 229910000323 aluminium silicate Inorganic materials 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 claims 1
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 claims 1
- 238000010298 pulverizing process Methods 0.000 claims 1
- 229910001930 tungsten oxide Inorganic materials 0.000 claims 1
- 238000004804 winding Methods 0.000 claims 1
- 239000012855 volatile organic compound Substances 0.000 description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 6
- 239000003546 flue gas Substances 0.000 description 6
- 230000003197 catalytic effect Effects 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonium chloride Substances [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 description 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 2
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 description 2
- 230000010718 Oxidation Activity Effects 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 235000011114 ammonium hydroxide Nutrition 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 240000001781 Xanthosoma sagittifolium Species 0.000 description 1
- XHCLAFWTIXFWPH-UHFFFAOYSA-N [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] XHCLAFWTIXFWPH-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 239000012876 carrier material Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000009849 deactivation Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- TXKMVPPZCYKFAC-UHFFFAOYSA-N disulfur monoxide Inorganic materials O=S=S TXKMVPPZCYKFAC-UHFFFAOYSA-N 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 150000004760 silicates Chemical class 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 150000003682 vanadium compounds Chemical class 0.000 description 1
- 229910001935 vanadium oxide Inorganic materials 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
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
-
- 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
- B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/20—Vanadium, niobium or tantalum
- B01J23/22—Vanadium
-
- 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
- B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/24—Chromium, molybdenum or tungsten
- B01J23/30—Tungsten
-
- 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
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
-
- B01J35/56—
Abstract
A method of preparation of a monolithic honeycomb oxidation catalyst, the honeycomb oxidation catalyst has a plurality of flow through channels confined by walls, the walls consisting of an inert material coated with a core layer comprising an inert clay material, the core layer is coated with a top layer comprising at least one metal selected from the group of platinum group metals and vanadium pentoxide.
Description
DK 180289 B1 1 Method of preparing a monolithic honeycomb oxidation cata- lyst The invention relates to a monolithic honeycomb catalyst for the oxidation of carbon monoxide and volatile organic compounds (VOCs) in exhaust gases and flue gases from sta- tionary flue gas sources including gas turbines and power plants.
The invention is in particular directed to a method of preparation of a monolithic honeycomb shaped oxidation cat- alyst with a core layer comprising inert clay material and a top layer comprising one or more platinum group metals (PGM) coated on a monolithic honeycomb shaped substrate for use in the removal of carbon monoxide and VOCs in flue gas formed in stationary sources in the combustion of fossil fuel like natural gas, coal or oil.
Methods for removing CO and VOCs by catalytic oxidation are well-known in the art.
The most typical oxidation catalyst compositions employed in flue gas cleaning from stationary sources are based on platinum supported on alumina for applications such as CO and VOC oxidation.
It is also known that palladium promoted vanadium oxide catalysts offer a very high CO and VOC oxidation activity in combination with a high sulfur resistance.
Those catalysts are in particular preferred where there is a risk of exposure to high sulfur containing flue gases and where high sulfate emissions and fouling of downstream
DK 180289 B1 2 equipment and/or risk of catalyst deactivation has to be minimized. The advantage of palladium based oxidation catalysts is that these catalysts have a relatively low sulfur oxidation activity, which is particularly important when employed in the cleaning of sulfur oxide containing flue gas. For use in gas cleaning from stationary sources, the cata- lyst is washcoated on a monolithic honeycomb substrate, typically consisting of stacked up corrugated sheets of ce- ramic material or non-woven glass fibers forming a mono- lithic honeycomb structure with a plurality of parallel flow through channels.
Monolithic honeycomb shaped catalysts of the above type are typically prepared by coating the monolithic honeycomb sub- strate with a washcoat containing a catalyst carrier mate- rial and impregnating the coated substrate with a solution of precursors of the catalytic active metal oxides. Alter- natively, the washcoat can also contain the precursors. Washcoating of a monolithic honeycomb substrate is usually performed by slurry pickup in the substrate by pouring the slurry into the channels of the substrate, by dipping the substrate at one side into the washcoat slurry and option- ally applying vacuum at the opposite side or by pumping the washcoat slurry into the channels and optionally applying vacuum.
DK 180289 B1 3 After having been coated with the washcoat, the substrate is dried and finally calcined for activation of the cata- lytic components in the coat.
EP 0599379 discloses a method for preparing an oxidation catalyst comprising a corrugated metal washcoated with a layer comprising a clay material such as bentonite onto which a top layer comprising a platinum group metal such as palladium. After the washcoating a calcination step is car- ried out.
It is well known that the oxidation reaction is much faster than diffusion of CO and some VOCs into the catalyst wall at typical oxidation reaction conditions and it would therefore be an advantage in terms of cost saving, when re- ducing or limiting distribution of the expensive PGM cata- lyst material only to the outer surface of the walls or the wall coat of the monolithic honeycomb substrate.
In the known oxidation catalysts as prepared by the above mentioned coating methods, the PGM catalyst is distributed throughout the whole wall cross section. Thus, the PGM cat- alyst distributed beneath surface of the walls does not participate in the catalytic CO and reactive VOC oxidation.
The problem is solved by the present invention, when providing the walls of the substrate with a core layer of inert clay materials and applying a washcoat comprising PGM on the surface of the core layer.
We have further found that diffusion of PGM can be elimi- nated or substantially diminished when decreasing the rate
DK 180289 B1 4of diffusion of PGM on the substrate.
Instead of having precursor compounds of PGM dissolved in an aqueous impreg- nation liquid, the precursor compounds are added to an aqueous slurry containing vanadium compounds, which act asa carrier for PGM and which is used for the coating of the inert clay core layer on the substrate.
In this aqueous slurry, the PCM compounds are adsorbed on the supported va- nadium compound particles and are thereby not dissolved in the aqueous phase of the aqueous slurry, which otherwisewould result in undesired diffusion into the walls of the substrate and/or clay core layer.
The catalyst prepared according to the invention has the advantage that it shows at least as good structure stabil-
ity as conventional monoliths since the overall thickness of the monolith wall is preserved due to the inert clay core layer.
The present invention reduces additionally the catalystload per unit volume of monolith leading to a reduced SO; oxidation.
The present invention is a method of preparing a monolithic honeycomb oxidation catalyst comprising the steps of
(a) providing an inert monolithic honeycomb substrate with a plurality of flow through channels confined by walls by stacking or rolling up one or more corrugated sheets of in- ert material, optionally provided with flat liners; (b) coating the monolithic honeycomb substrate with a corelayer comprising an inert clay material;
DK 180289 B1 (c) providing a washcoat comprising at least one metal se- lected from the group of platinum group metals and vanadium pentoxide; (d) coating the core layer with a top layer by applying 5 the washcoat prepared in step (c); and (e) calcining the coated monolithic honeycomb substrate, wherein the washcoat of step(c) is prepared by (1) pulverising a finished SCR catalyst product comprising vanadium pentoxide; (ii) dispersing the pulverized catalyst product in water and forming a slurry; (iii) adding a water soluble precursor of the at least one metal selected from the group of platinum group metals.
Specific features of the method according to the invention are alone or in combination thereof that the washcoat further comprises an oxide of tungsten and ti- tania; the finished SCR catalyst product comprises vanadium pent- oxide further comprises titania and an oxide of tungsten; the platinum group metal is palladium; the one or more corrugated sheets of inert material and the optional flat liners, comprise entangled non-woven fibers; the entangled non-woven fibers are glass fibers; the inert clay material is selected from the kaolin group, hydrous alumina silicates, the chlorite group, the py- rophillite group, bentonite or mixtures thereof; the top layer comprises 0.1 to 10 % by weight vanadium pentoxide; the top layer comprises 100 to 30000 ppm by weight palladi- um.
DK 180289 B1 6 By the terms “inert material” and “inert clay material” as used hereinbefore or in the following description and claims it should be understood that the material is not catalytically active.
Example An Pd-V;05-WO3-TiO, based oxidation catalyst on an inert clay core was prepared as follows.
A monolithic honeycomb substrate made of a number of corru- gated sheets made of glass fibers and provide each with a flat liner were coated with a core layer of kaolin by dip- ping the substrate into a slurry of kaolin and butanol un- til the wall thickness of the coated substrate was 0.4 mm. The thus prepared monolithic honeycomb substrate was then allowed to drain for 10 minutes, dried for three days and fired for two hours at 550°C in N, atmosphere.
The substrate with the kaolin core layer was coated with a wash coat prepared as follows: 200 grams of crushed and milled V>O05-WO3-Ti0» SCR catalyst in water (25 % by mass) was adjusted to a pH value of 8.5 by adding an aqueous ammonia solution. To the resulting slurry was added a Pd nitrate solution of 100 ppmw by metal until 1000 ppmw Pd by dry matter in the slurry was achieved. The resulting slurry was sufficiently mixed while adjusting pH to 8.5 using an aqueous ammonia solution fol- lowed by addition of polysaccharide to a concentration of
0.1 % by mass.
DK 180289 B1 7 The monolithic honeycomb substrate with an inert core layer of kaolin as prepared above was dipped into the slurry for
1.5 minutes and the slurry was afterwards allowed to drain from the substrate for 15 minutes. The resulting monolithic honeycomb catalyst was then calcined for two hours at 400°C.
Claims (9)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DKPA201600583A DK180289B1 (en) | 2016-10-03 | 2016-10-03 | Monolithic honeycomb oxidation catalyst and process for its preparation |
| CN201680058965.3A CN108136372B (en) | 2015-10-28 | 2016-10-26 | Monolithic honeycomb oxidation catalyst and preparation method thereof |
| PCT/EP2016/075723 WO2017072138A1 (en) | 2015-10-28 | 2016-10-26 | Monolithic honeycomb oxidation catalyst and method of preparation thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DKPA201600583A DK180289B1 (en) | 2016-10-03 | 2016-10-03 | Monolithic honeycomb oxidation catalyst and process for its preparation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DK201600583A1 DK201600583A1 (en) | 2018-04-23 |
| DK180289B1 true DK180289B1 (en) | 2020-10-07 |
Family
ID=61968312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DKPA201600583A DK180289B1 (en) | 2015-10-28 | 2016-10-03 | Monolithic honeycomb oxidation catalyst and process for its preparation |
Country Status (1)
| Country | Link |
|---|---|
| DK (1) | DK180289B1 (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3386621B2 (en) * | 1995-03-30 | 2003-03-17 | トヨタ自動車株式会社 | Exhaust gas purification catalyst for diesel engines |
| US7235507B2 (en) * | 2004-08-14 | 2007-06-26 | Sud-Chemie Inc. | Catalyst for purifying diesel engine exhaust emissions |
| EP1832332B1 (en) * | 2006-03-09 | 2016-05-04 | Haldor Topsøe A/S | Process and system for purification of sulphur-containing exhaust gas |
| US20150375207A1 (en) * | 2013-02-14 | 2015-12-31 | Haldor Topsoe A/S | Method and catalyst for the simultaneous removal of carbon monoxide and nitrogen oxides from flue or exhaust gas |
| WO2017072138A1 (en) * | 2015-10-28 | 2017-05-04 | Haldor Topsøe A/S | Monolithic honeycomb oxidation catalyst and method of preparation thereof |
-
2016
- 2016-10-03 DK DKPA201600583A patent/DK180289B1/en active IP Right Grant
Also Published As
| Publication number | Publication date |
|---|---|
| DK201600583A1 (en) | 2018-04-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE102014110811B4 (en) | CATALYST ARTICLE FOR TREATMENT OF EXHAUST GAS | |
| US9597636B2 (en) | Zoned catalyst for treating exhaust gas | |
| KR101153533B1 (en) | Catalyst for oxidation of metal mercury | |
| US20240082827A9 (en) | Extruded honeycomb catalyst | |
| KR20150091343A (en) | Ammonia oxidation catalyst | |
| EP3142773A2 (en) | Catalytic article for treating exhaust gas | |
| DE102014110543A1 (en) | WOLFRAM / TITANIUM DIOXIDE OXIDATION CATALYST | |
| EP3426395A1 (en) | Preparation method of a non-woven fibrous material-based honeycomb catalyst | |
| JP2016530070A (en) | Catalytic filter for treating exhaust gas | |
| KR20160013217A (en) | Catalyzed filter for treating exhaust gas | |
| US10799832B2 (en) | Catalyst article for use in an emission treatment system | |
| CN108136372B (en) | Monolithic honeycomb oxidation catalyst and preparation method thereof | |
| US20150151293A1 (en) | Scr catalyst and method of preparation thereof | |
| CN111818999B (en) | Catalyst article for use in an emission treatment system | |
| KR102625031B1 (en) | Catalysts, exhaust systems and methods for exhaust gas treatment | |
| JP2017518875A (en) | High NOx-SCR conversion rate and low SOx conversion rate | |
| JP2013180286A (en) | Denitration catalyst for treating exhaust gas and method for treating exhaust gas | |
| DK180289B1 (en) | Monolithic honeycomb oxidation catalyst and process for its preparation | |
| KR20180064929A (en) | NOx Removal Catalyst using Porous Ceramic Structures with Three-Dimensional Network for Exhaust Gases Discharged from Marine Engine and Process for Preparing the Same | |
| KR102610338B1 (en) | Honeycomb catalyst for removing nitrogen oxides in flue gas and exhaust gas and method for manufacturing the same | |
| WO2020149313A1 (en) | Catalyst for exhaust gas purification use | |
| RU2784964C2 (en) | Catalytic product for use in system for exhaust gas processing | |
| WO2024008077A1 (en) | Catalytic article comprising ammonia oxidation catalyst | |
| WO2020149315A1 (en) | Catalyst for exhaust gas purification use, and method for producing catalyst for exhaust gas purification use | |
| JP2010051836A (en) | Nitrogen oxide purifying catalyst and nitrogen oxide purifying method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PME | Patent granted |
Effective date: 20201007 |