NiO catalyst configurations, methods for making NOx adsorbers, and methods for reducing emissions
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01J-023/58
B01J-023/40
B01J-023/42
B01J-023/00
B01J-021/00
출원번호
US-0186981
(2002-07-01)
§371/§102 date
20030909
(20030909)
발명자
/ 주소
Dou, Danan
출원인 / 주소
Delphi Technologies, Inc.
인용정보
피인용 횟수 :
4인용 특허 :
29
초록▼
In one embodiment, the method for making a NOx adsorber comprises: thermally treating NiO to a temperature of about a maximum catalyst application temperature minus 100° C. and the maximum catalyst application temperature, disposing a catalyst configuration on the substrate, wherein the catalyst con
In one embodiment, the method for making a NOx adsorber comprises: thermally treating NiO to a temperature of about a maximum catalyst application temperature minus 100° C. and the maximum catalyst application temperature, disposing a catalyst configuration on the substrate, wherein the catalyst configuration comprises the thermally treated NiO and a NOx adsorption catalyst, and disposing the substrate in a housing.
대표청구항▼
1. A catalyst configuration, comprising:a substrate; a NiO layer disposed on the substrate, wherein the NiO layer comprises greater than or equal to about 75 wt % of the NiO in the catalyst configuration; and a catalyst layer comprising a NOx adsorbing catalyst; wherein no platinum group metal was a
1. A catalyst configuration, comprising:a substrate; a NiO layer disposed on the substrate, wherein the NiO layer comprises greater than or equal to about 75 wt % of the NiO in the catalyst configuration; and a catalyst layer comprising a NOx adsorbing catalyst; wherein no platinum group metal was added to the NiO layer. 2. The catalyst configuration of claim 1, further comprising a trapping material selected from the group consisting of barium carbonate, potassium carbonate, and combination thereof.3. The catalyst configuration of claim 2, wherein the trapping material comprises barium carbonate and wherein the trapping material is disposed in the catalyst layer.4. A catalyst configuration of claim 1,wherein the NiO comprises NiO that has been thermally treated to between about a maximum catalyst application temperature minus 100° C. and the maximum catalyst application temperature. 5. The catalyst configuration of claim 4, wherein the catalyst layer further comprises metal selected from the group consisting of platinum, palladium, rhodium, alloys thereof, and combinations thereof.6. The catalyst configuration of claim 4, wherein the catalyst layer further comprises underlayer disposed between the NiO layer and an overlayer.7. The catalyst configuration of claim 6, wherein the overlayer further comprises greater an or equal to about 75 wt % of palladium in the catalyst configuration.8. The catalyst configuration of claim 6, the underlayer comprises platinum and greater than or equal to 75 wt % of the rhodium and is free of the palladium in the catalyst configuration.9. The catalyst configuration of claim 1, wherein the catalyst layer further comprises metal selected from the group consisting of platinum, palladium, rhodium, alloys thereof, and combinations thereof.10. A catalyst configuration, comprising:a substrate; a NiO layer disposed on the substrate, wherein the NiO layer comprises greater than or equal to about 75 wt % of the NiO in the catalyst configuration; and a catalyst layer comprising a NOx adsorbing catalyst; wherein the catalyst layer further comprises an underlayer disposed between the NiO layer and an overlayer. 11. The catalyst configuration of claim 10, wherein the catalyst configuration further comprises palladium, and wherein the overlayer further comprises greater than or equal to about 75 wt % of the palladium.12. The catalyst configuration of claim 11, wherein the overlayer is free of rhodium.13. The catalyst configuration of claim 10, the underlayer comprises platinum and greater than or equal to 75 wt % of the rhodium in the catalyst layer.14. The catalyst configuration of claim 13, wherein the underlayer is free of palladium.15. A catalyst configuration, comprising:a substrate a NiO layer disposed on the substrate, wherein the NiO layer comprises greater than or equal to about 75 wt % of the NiO in the catalyst configuration; and a catalyst layer comprising a NOx adsorbing catalyst; wherein the NOx adsorbing catalyst has been post-impregnated into the catalyst layer on a side of the catalyst layer opposite the NiO layer. 16. A catalyst configuration, comprising:a substrate; a catalyst layer disposed on the substrate, wherein the catalyst layer comprises a NOx adsorbing catalyst and thermally treated NiO that has been thermally treated to between about a maximum catalyst application temperature minus 100° C. and the maximum catalyst application temperature; wherein the NOx adsorbing catalyst has been post-impregnated into the catalyst layer on a side of the catalyst layer opposite the NiO layer.
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