Method for preparing supported catalyst for heterogeneous catalytic ozonation
US-2018264457-A1 · Sep 20, 2018 · US
Method for preparing a catalyst-containing ceramic filter for off-gas or exhaust gas cleaning
US2018250665A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2018250665-A1 |
| Application number | US-201615760278-A |
| Country | US |
| Kind code | A1 |
| Filing date | Sep 28, 2016 |
| Priority date | Oct 2, 2015 |
| Publication date | Sep 6, 2018 |
| Grant date | — |
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Abstract
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A catalyst-containing ceramic dust filter for off-gas or exhaust gas cleaning is prepared by a method comprising the steps of making a water-based impregnation slurry, which comprises a catalytically effective amount of at least one catalytically active metal and an oxide support, to form a catalytically active metal oxide support, impregnating the filter substrate with the impregnation slurry, spraying from the inside to control the amount of liquor while leaving the outer few millimeters of the filter wall dry, and drying the impregnated filter. The impregnated filter is preferably dried by using microwave energy.
First claim
Opening claim text (preview).
1 . A method of preparing a catalyst-containing ceramic dust filter for off-gas or exhaust gas cleaning, said method comprising the steps of preparing a water-based impregnation slurry, which comprises a catalytically effective amount of at least one catalytically active metal and an oxide support, to form a catalytically active metal oxide support, impregnating the filter substrate with the impregnation slurry, spraying from the inside to control the amount of liquor while leaving the outer few millimeters of the filter wall dry, and drying the impregnated filter. 2 . The method according to claim 1 , wherein the impregnated filter is dried by using microwave energy. 3 . The method according to claim 1 , wherein the at least one catalytically active metal comprises a combined selective catalytic reduction (SCR) and oxidation catalyst and a precious metal comprising catalyst. 4 . The method according to claim 3 , wherein the combined SCR and oxidation catalyst comprises a vanadium oxide and titania. 5 . The method according to claim 3 , wherein the precious metal comprising catalyst is a palladium catalyst. 6 . The method according to claim 5 , wherein the palladium catalyst is combined with a vanadium oxide and titania. 7 . The method according to claim 5 , wherein the vanadium oxide/titania catalyst is additionally dispersed on the permeation side of the filter together with the palladium catalyst. 8 . The method according to claim 5 , wherein the palladium catalyst contains palladium in an amount of between 20 and 1000 ppm/weight of the filter.
Assignees
Inventors
Classifications
Palladium · CPC title
Palladium · CPC title
- B01J37/346Primary
of microwave energy · CPC title
Simultaneously removing carbon monoxide, hydrocarbons or carbon making use of oxidation catalysts (three-way-catalysts [TWC] B01D53/9445) · CPC title
Vanadium · CPC title
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- What does patent US2018250665A1 cover?
- A catalyst-containing ceramic dust filter for off-gas or exhaust gas cleaning is prepared by a method comprising the steps of making a water-based impregnation slurry, which comprises a catalytically effective amount of at least one catalytically active metal and an oxide support, to form a catalytically active metal oxide support, impregnating the filter substrate with the impregnation slurry,…
- Who is the assignee on this patent?
- Haldor Topsoe As
- What technology area does this patent fall under?
- Primary CPC classification B01J37/346. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu Sep 06 2018 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).