Methods of regeneration of SCR catalyst poisoned by phosphorous components in flue gas
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B01J-038/00
B01J-038/48
B01J-038/64
출원번호
UP-0287365
(2008-10-08)
등록번호
US-7741239
(2010-07-12)
발명자
/ 주소
Hartenstein, Hans-Ulrich
Hoffmann, Thies
출원인 / 주소
Evonik Energy Services LLC
대리인 / 주소
K&L Gates LLP
인용정보
피인용 횟수 :
10인용 특허 :
36
초록▼
A method of regeneration of a SCR catalyst for use in high temperature thermal processes such as in a power plant facility burning fossil fuels, bio-based fuels, or a combination thereof, wherein the catalyst is poisoned by phosphorous components in the flue gas and the catalyst is treated using a b
A method of regeneration of a SCR catalyst for use in high temperature thermal processes such as in a power plant facility burning fossil fuels, bio-based fuels, or a combination thereof, wherein the catalyst is poisoned by phosphorous components in the flue gas and the catalyst is treated using a base, preferably an alkali metal hydroxide.
대표청구항▼
What is claimed is: 1. A method of regenerating a phosphorous-poisoned SCR catalyst, the method comprising treating the phosphorous-poisoned catalyst with an alkali metal hydroxide at a pH above 8.5. 2. The method according to claim 1, wherein the alkali metal hydroxide is sodium hydroxide, potas
What is claimed is: 1. A method of regenerating a phosphorous-poisoned SCR catalyst, the method comprising treating the phosphorous-poisoned catalyst with an alkali metal hydroxide at a pH above 8.5. 2. The method according to claim 1, wherein the alkali metal hydroxide is sodium hydroxide, potassium hydroxide, or a combination thereof. 3. A method of regenerating a phosphorous-poisoned SCR catalyst, the method comprising treating the phosphorous-poisoned catalyst with an alkali metal hydroxide at a pH in a range of from above about 10 to about 14 and a temperature up to about 176° F. 4. The method according to claim 3, wherein the alkali metal hydroxide is sodium hydroxide, potassium hydroxide, or a combination thereof. 5. The method according to claim 3, wherein the phosphorous-poisoned catalyst is treated in a soaking bath, an ultrasonic treatment solution, or a combination thereof. 6. The method according to claim 5, wherein the bath or solution further comprises a surface active substance. 7. The method according to claim 3, wherein the catalyst is treated at a temperature in a range of from about 60° F. to about 140° F. 8. The method according to claim 7, wherein the catalyst is treated at a temperature in a range of from about 120° F. to about 130° F. 9. The method according to claim 3, wherein the pH is in the range of from about 12 to about 13. 10. A method of cleaning a phosphorous-poisoned SCR catalyst, the method comprising cleaning the phosphorous-poisoned catalyst with an alkali metal hydroxide by immersing the catalyst in a soaking bath, an ultrasonic treatment solution, or a combination thereof, wherein the soaking bath or ultrasonic treatment solution has a pH in a range of from about 10 to about 14 and a temperature in the range from about 60° F. to about 140° F. 11. The method according to claim 10, wherein the alkali metal hydroxide is sodium hydroxide, potassium hydroxide, or a combination thereof. 12. The method according to claim 10, wherein the temperature of the soaking bath or treatment solution is in a range of from about 120° F. to about 130° F. 13. The method according to claim 10, wherein the soaking bath or ultrasonic treatment further comprises a surface active substance. 14. The method according to claim 10, wherein the concentration of alkali metal hydroxide is from about 0.1 weight % to about 4 weight %.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (36)
Hums Erich (Bamberg DEX), Apparatus for regenerating depleted deNOx catalysts.
Abel Roland (Oberhausen DEX) Worner Karl-Fred (Hofheim DEX), Carrier catalyst, process for the production thereof, and use thereof for the preparation of vinyl acetate.
Friesen Dwayne T. ; Babcock Walter C. ; Edlund David J. ; Lyon David K. ; Miller Warren K., Liquid absorbent solutions for separating nitrogen from natural gas.
Neufert Ronald,DEX ; Mathes Wieland,DEX ; Schobert-Schaefer Dagmar,DEX ; Hofmann Lothar,DEX, Method for the catalytic conversion of nitrogen oxides present in the exhaust gas of an internal-combustion engine.
Gadgil, Mandar R.; Ghorishi, S. Behrooz, System and method for increasing the service life and/or catalytic activity of an SCR catalyst and control of multiple emissions.
Gadgil, Mandar R; Jankura, Bryan J; Gayheart, Jeb W, System and method for increasing the service life and/or catalytic activity of an SCR catalyst and control of multiple emissions.
Yezerets, Aleksey; Szailer, Tamas; Kamasamudram, Krishna; Currier, Neal W.; Ancimer, Richard J., Targeted regeneration of a catalyst in an aftertreatment system.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.