[특허]Method for improved Fischer-Tropsch catalyst stability and higher stable syngas conversion

Method for improved Fischer-Tropsch catalyst stability and higher stable syngas conversion 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C07C-027/00
출원번호	US-0654087 (2003-09-03)
발명자 / 주소	Raje,Ajoy P. Espinoza,Rafael
출원인 / 주소	ConocoPhillips Company
대리인 / 주소	Conley Rose P.C.
인용정보	피인용 횟수 : 6 인용 특허 : 64

초록 ▼

The present invention is generally related towards methods for preparing and using a more stable synthesis catalysts. In particular, the present invention is directed towards treating synthesis catalysts with low levels of oxygen to deactivate the smaller more unstable metal crystallites present in

대표청구항 ▼

What is claimed is: 1. A process for producing liquid hydrocarbons comprising: (a) contacting a hydrocarbon synthesis catalyst comprising a plurality of molecular metal crystallites having a plurality of crystallite sizes with a gas comprising an oxygen content of between 0.1 and 20 ppm; and (b) reacting a gas feedstream comprising hydrogen and carbon monoxide in a hydrocarbon synthesis reactor containing the hydrocarbon synthesis catalyst under conditions effective to produce hydrocarbon products wherein at least a portion of the hydrocarbon products are liquid under the operating conditions of the synthesis reactor. 2. The process of claim 1 wherein the oxygen content is between 0.1 and 10 ppm. 3. The process of claim 1 wherein step (a) is carried out during any activation process for the synthesis catalyst. 4. The process of claim 1 wherein step (a) is carried out during operation of the hydrocarbon synthesis reactor. 5. The process of claim 1 wherein step (a) and step (b) are carried out simultaneously. 6. The process of claim 1 wherein step (a) and step (b) are carried out intermittently within the synthesis reactor. 7. The process of claim 5 wherein the hydrocarbon synthesis catalyst comprises a Fischer-Tropsch catalyst. 8. The process of claim 1 wherein the synthesis catalyst exhibits an initial CO conversion and a pseudo-steady state CO conversion, and the ratio of the pseudo-steady state CO conversion over the initial CO conversion is equal to or greater than 0.8. 9. A process for producing hydrocarbons from synthesis gas comprising: (a) providing an initial feedstream comprising hydrogen and carbon monoxide; (b) optionally, determining an oxygen content of said feedstream; (c) adding an amount of a gas stream to said feedstream to provide an adjusted feedstream having a more desirable oxygen content of between 0.1 and 20 ppm; and (d) reacting at least a portion of said adjusted feedstream stream comprising a more desirable oxygen content over a hydrocarbon synthesis catalyst comprising a plurality of catalytic metal crystallites of different sizes. 10. The process of claim 9 wherein the adjusted feedstream has an oxygen content between 0.1 and 10 ppm. 11. The process of claim 9 wherein the initial feedstream has an oxygen content more than 20 ppm, and step (c) comprises adding the gas stream having no molecular oxygen, thereby diluting the initial feedstream. 12. The process of claim 9 wherein the initial feedstream has an oxygen content less than 20 ppm, and step (c) comprises adding the gas stream having molecular oxygen, thereby enriching the initial feedstream. 13. The process of claim 9 wherein the more desirable oxygen content in said adjusted feedstream is sufficient for inactivating substantially all of the crystallites having a size below 5 nm. 14. The process of claim 9 wherein the hydrocarbon synthesis catalyst is active for Fischer-Tropsch synthesis. 15. The process of claim 9 wherein the hydrocarbon synthesis catalyst comprises cobalt, iron, or ruthenium. 16. A process for producing hydrocarbons from synthesis gas comprising: (a) providing an initial feedstream comprising oxygen, hydrogen and carbon monoxide; (b) optionally, determining an oxygen content of said feedstream; (c) generating an adjusted feedstream by removing a portion of said oxygen from at least a portion of the initial Fischer-Tropsch feedstream by passing said portion of the initial feedstream through an oxygen removal unit, such that the oxygen concentration in the adjusted feedstream is adjusted to a more desirable value of between 0.1 and 20 ppm and (d) reacting under conditions effective to produce hydrocarbons at least a portion of said adjusted feedstream comprising the more desirable oxygen content over a hydrocarbon synthesis catalyst comprising a plurality of catalytic metal crystallites of different sizes. 17. The process of claim 16 wherein the adjusted feedstream has an oxygen content between 0.1 and 10 ppm. 18. The process of claim 16 wherein the initial feedstream has an oxygen content more than 20 ppm, and step (c) comprises removing enough oxygen to achieve an oxygen content between 0.1 and 20 ppm in the adjusted feedstream. 19. The process of claim 16 wherein the more desirable oxygen content in said adjusted feedstream is sufficient for inactivating substantially all of the crystallites having a size below 5 nm. 20. The process of claim 16 wherein the hydrocarbon synthesis catalyst is active for Fischer-Tropsch synthesis. 21. The process of claim 16 wherein the hydrocarbon synthesis catalyst comprises cobalt, iron, or ruthenium. 22. The process of claim 1 wherein the hydrocarbon synthesis catalyst comprises cobalt, iron, or ruthenium. 23. A process for producing hydrocarbons from synthesis gas comprising: providing a hydrocarbon synthesis catalyst comprising a plurality of metal crystallites having a plurality of crystallites sizes, wherein the hydrocarbon synthesis catalyst is activated with a reducing gas and subjected to low levels of oxygen of between 0.1 and 20 ppm; and reacting a feedstream comprising hydrogen and carbon monoxide in a hydrocarbon synthesis reactor containing said hydrocarbon synthesis catalyst under conditions effective to produce hydrocarbon products, wherein at least a portion of the hydrocarbon products are liquid under the operating conditions of the synthesis reactor. 24. The process of claim 23 wherein the hydrocarbon synthesis catalyst is subjected to low levels of oxygen during the catalyst activation with the reducing gas. 25. The process of claim 24 wherein the reducing gas comprises said low levels of oxygen. 26. The process of claim 25 wherein the reducing gas has an oxygen content between 0.1 and 10 ppm. 27. The process of claim 23 wherein the catalyst exhibits an initial CO conversion and a pseudo-steady state CO conversion, and the ratio of the pseudo-steady state CO conversion over the initial CO conversion is equal to or greater than 0.8. 28. The process of claim 23 wherein the hydrocarbon synthesis catalyst comprises cobalt, iron, ruthenium. 29. The process of claim 23 wherein the hydrocarbon synthesis catalyst comprises cobalt as catalytic metal and wherein subjecting the catalyst to low oxygen levels is carried out in a manner sufficient to inactivate substantially all of the catalytic metal crystallites having a size below 5 nm.

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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연합인증

Method for improved Fischer-Tropsch catalyst stability and higher stable syngas conversion 원문보기

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Method for improved Fischer-Tropsch catalyst stability and higher stable syngas conversion 원문보기

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