IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0946889
(2010-11-16)
|
등록번호 |
US-8388898
(2013-03-05)
|
우선권정보 |
DE-100 34 045 (2000-07-13) |
발명자
/ 주소 |
- Heidenreich, Steffen
- Roessler, Max-Eckhard
- Walch, Astrid
- Gutmann, Manfred
- Chudzinski, Sven
|
출원인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
16 |
초록
▼
The reduction of nitrogen oxides in gas is carried out, by means of selective reaction of the nitrogen oxide with the reducing agent in the in the solid catalyst. In order to achieve high catalytic activity, the above is carried out at high gas temperatures. As a rule, ceramic filter elements, coate
The reduction of nitrogen oxides in gas is carried out, by means of selective reaction of the nitrogen oxide with the reducing agent in the in the solid catalyst. In order to achieve high catalytic activity, the above is carried out at high gas temperatures. As a rule, ceramic filter elements, coated with catalytic material are used. This does, however, give rise to the risk the catalytically active components are stripped from the filter during the hot gas filtration. A ceramic filter element with support material in the form of particles, with binder material and catalytic material is thus disclosed, whereby the binder material comprises catalytic material, or the binder material is partly replaced by the catalyst material and the support material particles (1) are connected to each other by means of the catalyst and/or binder material.
대표청구항
▼
1. A ceramic filter element for hot-gas filtration, comprising: a first layer in the flow direction for particle separation anda second layer providing a support body, wherein the support body comprises support material particles selected from the group consisting of SiC, mullite, and aluminum oxide
1. A ceramic filter element for hot-gas filtration, comprising: a first layer in the flow direction for particle separation anda second layer providing a support body, wherein the support body comprises support material particles selected from the group consisting of SiC, mullite, and aluminum oxide,bonding material, andcatalyst material, the catalyst material being selected from the group consisting of one or more oxides of rare earth metals, one or more aluminates, titanates, and TiO2, andthe catalyst material being doped with a promoter, the promoter being selected from the group consisting of platinum, palladium, rhodium, gold, silver, nickel, copper, manganese and cobalt,wherein the support body, including the support material particles, the bonding material, and the catalyst material, is a sintered support body, and the support material particles are bonded to one another at least partly by the catalyst material, and the catalyst and bonding materials are present as composite particles comprising 90-99% by weight catalyst material and a remainder of bonding material. 2. The filter element according to claim 1, wherein the catalyst material comprises one or more oxides of the rare earth metals and/or one or more aluminates. 3. The filter element according to claim 1, wherein the catalyst material comprises one or more aluminates, one or more titanates, or titanium dioxide. 4. The filter element according to claim 2, wherein the catalyst material comprises calcium aluminate. 5. The filter element according to claim 1, wherein the catalyst material comprises an adherence agent. 6. The filter element according to claim 1, wherein the support body comprises 60-90% by weight of support material particles and 10-40% by weight of catalyst/bonding material. 7. The filter element according to claim 6, wherein the support body comprises 65-75% by weight of support material particles and 25-35% by weight of catalyst material. 8. The ceramic filter element according to claim 1, wherein the support material particles comprise SiC. 9. The ceramic filter element according to claim 1, wherein the support material particles comprise mullite. 10. The ceramic filter element according to claim 1, wherein the support material particles comprise aluminum oxide. 11. The ceramic filter element according to claim 1, wherein the catalyst material comprises one or more oxides of rare earth metals. 12. The ceramic filter element according to claim 1, wherein the catalyst material comprises one or more aluminates. 13. The ceramic filter element according to claim 1, wherein the catalyst material comprises one or more titanates. 14. The ceramic filter element according to claim 1, wherein the catalyst material comprises TiO2.
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