Methods and formulations for enhancing NH3 adsorption capacity of selective catalytic reduction catalysts
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01J-023/00
B01J-021/00
B01J-020/00
출원번호
US-0884690
(2010-09-17)
등록번호
US-8138114
(2012-03-20)
발명자
/ 주소
Jen, Hungwen
Graham, George
McCabe, Robert
출원인 / 주소
Ford Motor Company
대리인 / 주소
Porcari, Damian
인용정보
피인용 횟수 :
0인용 특허 :
43
초록▼
A method of providing an automobile exhaust catalyst composition. The method includes acidifying a support composition with a conjugate base oxide of an inorganic acid having a Ka to obtain an acidified support exhaust catalyst composition. The support composition includes a combination of a cerium-
A method of providing an automobile exhaust catalyst composition. The method includes acidifying a support composition with a conjugate base oxide of an inorganic acid having a Ka to obtain an acidified support exhaust catalyst composition. The support composition includes a combination of a cerium-containing oxide compound and non-cerium-containing compound selected from the group consisting of alkali metal containing compounds, alkaline-earth metal containing compounds and combinations thereof.
대표청구항▼
1. A method of preparing an automobile exhaust gas catalyst composition, the method comprising: acidifying a support composition with a conjugate base oxide of an inorganic acid having a Ka to obtain an acidified support exhaust catalyst composition, the support composition includes a combination of
1. A method of preparing an automobile exhaust gas catalyst composition, the method comprising: acidifying a support composition with a conjugate base oxide of an inorganic acid having a Ka to obtain an acidified support exhaust catalyst composition, the support composition includes a combination of a cerium-containing oxide compound and non-cerium-containing compound selected from the group consisting of alkali metal containing compounds, alkaline-earth metal containing compounds and combinations thereof. 2. The method of claim 1, wherein the Ka is in the range of 5.0 ×10−7 to 1.0. 3. The method of claim 1, wherein the Ka is in the range of 5.0 ×10−5 to 5.0 ×10−1. 4. The method of claim 1, wherein the conjugate base oxide is the conjugate base of an acid selected from the group consisting of H3PO4, H2TiO3, H2WO4, H2MoO4, HTa2O6, HNb2O6, H2CrO4 and combinations thereof. 5. The method of claim 1, wherein the support composition is selected from the group consisting of Al2O3, SiO2, TiO2, ZrO2, CeO2 and combinations thereof. 6. The method of claim 1, wherein the NH3 desorption per gram of acidified support composition is in the range of 3 to 25 ml upon substantially complete thermal release of NH3 after saturation of the acidified support composition with NH3. 7. The method of claim 1, wherein the acidified support composition desorbs a substantial amount of NH3 in the range of temperatures from 150 to 350 ° C. during substantially complete thermal release of NH3 after saturation of the acidified support composition with NH3. 8. A method of preparing an automobile exhaust gas catalyst composition, the method comprising: providing a support composition including a combination of a cerium-containing oxide compound and non-cerium-containing compound selected from the group consisting of alkali metal containing compounds, alkaline-earth metal containing compounds and combinations thereof; andacidifying the support composition with a conjugate base oxide of an inorganic acid having a Ka to obtain an acidified support exhaust catalyst composition. 9. The method of claim 8, wherein the Ka is in the range of 5.0 ×10−7 to 1.0. 10. The method of claim 8, wherein the Ka is in the range of 5.0 ×10−5 to 5.0 ×10−. 11. The method of claim 8, wherein the conjugate base oxide is the conjugate base of an acid selected from the group consisting of H3PO4, H2TiO3, H2WO4, H2MoO4, HTa2O6, HNb2O6, H2CrO4 and combinations thereof. 12. The method of claim 8, wherein the support composition is selected from the group consisting of Al2O3, SiO2, TiO2, ZrO2, CeO2 and combinations thereof. 13. The method of claim 8, wherein the NH3 desorption per gram of acidified support composition is in the range of 3 to 25 ml upon substantially complete thermal release of NH3 after saturation of the acidified support composition with NH3. 14. The method of claim 8, wherein the acidified support composition desorbs a substantial amount of NH3 in the range of temperatures from 150 to 350° C. during substantially complete thermal release of NH3 after saturation of the acidified support composition with NH3. 15. A method of forming an SCR catalyst system comprising: providing a substrate; andapplying a support composition and a conjugate base oxide of an inorganic acid having a Ka to the substrate to obtain an SCR catalyst system, the support composition including a combination of a cerium-containing oxide compound and non-cerium-containing compound selected from the group consisting of alkali metal containing compounds, alkaline-earth metal containing compounds and combinations thereof. 16. The method of claim 15, wherein the applying step is carried out by wash coating the support composition and the conjugate base oxide of the inorganic acid having the Ka onto the substrate. 17. The method of claim 15, wherein the substrate is a brick substrate. 18. The method of claim 15, wherein the Ka is in the range of 5.0 ×10−7 to 1.0. 19. The method of claim 15, wherein the Ka is in the range of 5.0 ×10−5 to 5.0 ×10−1. 20. The method of claim 15, wherein the conjugate base oxide is the conjugate base of an acid selected from the group consisting of H3PO4, H2TiO3, H2WO4, H2MoO4, HTa2O6, HNb2O6, H2CrO4 and combinations thereof.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (43)
Satoshi Aoyama JP, Apparatus and method for reducing carbon monoxide concentration and catalyst for selectively oxidizing carbon monoxide.
Acres Gary James Keith (London EN) Cooper Barry John (London EN) Diwell Alan Francis (London EN) Evans William David James (London EN), Catalyst for purifying automotive exhaust gases.
Farnos Maria D. (Wilmington DE) McWilliams John P. (Woodbury NJ) Sharma Sanjay B. (Langhorne PA) Shihabi David S. (Pennington NJ), Catalytic system for the reducton of nitrogen oxides.
Park Sang-Eon,KRX ; Kim Gyung-Mi,KRX ; Lee Yun-Jo,KRX ; Chang Jong-San,KRX ; Han Seong-Hee,KRX, Method for removing nitrogen oxides in exhaust gas by selective catalytic reduction and catalyst for reduction of nitrog.
Hepburn Jeffrey Scott ; Thanasiu Eva ; Watkins William Lewis Henderson ; Hubbard Carolyn Parks ; Dobson Douglas A. ; Gandhi Haren Sakarlal, Potassium/manganese nitrogen oxide traps for lean-burn engine operation.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.