Catalytic partial oxidation process for recovering sulfur from an HS-containing gas stream
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C01B-017/04
C01B-017/00
출원번호
US-0225355
(2005-09-13)
등록번호
US-7326397
(2008-02-05)
발명자
/ 주소
Ramani,Sriram
Keller,Alfred E.
Panjala,Devadas
출원인 / 주소
ConocoPhillips Company
대리인 / 주소
Conley Rose P.C.
인용정보
피인용 횟수 :
1인용 특허 :
75
초록▼
A process for purifying a light hydrocarbon stream containing H2S is disclosed in which the selective catalytic partial oxidation of the H2S component is carried out while the hydrocarbon components slip through substantially unconverted. A catalyst that favors the partial oxidation of H2S over conv
A process for purifying a light hydrocarbon stream containing H2S is disclosed in which the selective catalytic partial oxidation of the H2S component is carried out while the hydrocarbon components slip through substantially unconverted. A catalyst that favors the partial oxidation of H2S over conversion of the hydrocarbon component of a gaseous H2S-light hydrocarbon mixture is employed. Apparatus for selectively cleaning up light hydrocarbon streams containing low concentrations (e.g., less than 25 vol. %), and apparatus for selectively cleaning up light hydrocarbon streams having higher concentrations (e.g., greater than 25 vol. %) of H2S are also disclosed.
대표청구항▼
What is claimed is: 1. A process of sweetening a light hydrocarbon feed gas stream containing at least one C1-C5 hydrocarbon component and an H2S component, the process comprising: at a temperature above about 500�� C., at a molar ratio of H2S to O2 in the range of about 2:1 to about 5:1, and in th
What is claimed is: 1. A process of sweetening a light hydrocarbon feed gas stream containing at least one C1-C5 hydrocarbon component and an H2S component, the process comprising: at a temperature above about 500�� C., at a molar ratio of H2S to O2 in the range of about 2:1 to about 5:1, and in the presence of a H2S-selective catalyst comprising Pt, Rh, Ir, Sn, and Mg, partially oxidizing the H2S component in said light hydrocarbon feed gas stream to form elemental sulfur and water without converting more than about 10 mole % of the carbon content of said light hydrocarbon component to CO or CO2; recovering unreacted light hydrocarbon; and recovering liquid sulfur. 2. The process of claim 1 wherein said catalyst is more active for catalyzing the reaction H2O S+��O2→Sx+H2 (x=2, 6, 8) than for catalyzing the reaction CmH2n+m/2 O2 →m CO+n H2, wherein m=1-5 and n=2-6. 3. The process of claim 1 wherein said partial oxidizing is carried out at superatmospheric pressure. 4. The process of claim 1 wherein said partial oxidizing is carried out at a space velocity of at least 20,000 h-1. 5. The process of claim 1 comprising: combining said light hydrocarbon feed gas stream and an O2 containing stream to form a reactant gas mixture comprising said light hydrocarbon, H2S and O2; at a temperature in the range of about 700�� C. to about 1,450�� C., flowing a stream of said reactant gas mixture over said catalyst in a reaction zone such that the contact time of each portion of reactant gas mixture that contacts said catalyst is sufficiently brief to allow the reaction description="In-line Formulae" end="lead"H2S+��O2→1/xSx+H 2Odescription="In-line Formulae" end="tail" (x =2, 6 or 8) to occur, whereby a reacted gas stream is formed comprising gaseous elemental sulfur, water, and unreacted light hydrocarbon; passing said reacted gas stream into a first cooling zone and cooling said reacted gas stream to a temperature above the condensation point of elemental sulfur but below about 350�� C., to yield a partially cooled reacted gas stream; passing said partially cooled reacted gas stream into a second cooling zone and cooling said partially cooled gas to a temperature to a temperature below the condensation point of elemental sulfur but above the freezing point of elemental sulfur, to yield liquid sulfur and a process gas stream containing unreacted light hydrocarbon, water vapor and residual sulfur vapor; passing said process gas stream into a sulfur vapor cleanup unit, to convert sulfur vapor and any non-H2S sulfur compounds to H2S; passing said gas stream from said cleanup unit into a water condenser to provide a light hydrocarbon stream and liquid water; passing said partially purified light hydrocarbon stream into an amine absorption/regeneration unit to yield a purified light hydrocarbon stream and a regenerated H2S stream; and combining said regenerated H2S stream with said light hydrocarbon stream. 6. The process of claim 5 wherein said light hydrocarbon feed gas stream comprises at least about 25 vol. % H2S. 7. The process of claim 5 wherein said light hydrocarbon feed gas stream contains less than about 25 vol. % H2S, the process further comprising: splitting said light hydrocarbon feed gas stream into primary and secondary feed gas streams; passing said primary feed gas stream into said amine absorption unit to yield said purified light hydrocarbon stream and said regenerated H2S stream; enriching said secondary feed gas stream with said regenerated H2S such that the resulting enriched feed gas stream comprises at least 25 vol. % H2S; combining said enriched secondary feed gas stream and said O2 containing stream to form said reactant gas mixture comprising said light hydrocarbon, H2S and O02. 8. The process of claim 7 wherein said step of combining said regenerated H2S stream with said light hydrocarbon stream comprises combining said regenerated H2S stream with said secondary feed gas stream to provide said enriched feed gas stream. 9. The process of claim 1 comprising maintaining an approximately 3:1 molar ratio of H2S to O2 in said reactant gas mixture. 10. The process of claim 1 comprising preheating said reactant gas mixture to a temperature in the range of about 150�� C. to about 350�� C. prior to contacting said catalyst. 11. The process of claim 1 wherein said O2-containing gas is chosen from the group consisting of purified O2, and O2 enriched air. 12. The process of claim 1 comprising keeping the temperature of said catalyst at about 700�� C.-1,450�� C. 13. The process of claim 1 comprising initially heating said catalyst to at least about 700�� C. while passing said reactant gas mixture over said catalyst until said H2S partial oxidation reaction is initiated. 14. The process of claim 1 comprising maintaining reaction promoting conditions such that said H2S catalytic partial oxidation reaction continues autothermally. 15. The process of claim 1 wherein said catalyst comprising Pt, Rh, Ir, Sn, and Mg is supported on a refractory support. 16. The process of claim 15 wherein said catalyst comprises a mixture of 0.25-5 wt. % Pt, 0.25-5 wt. % Rh, 0.25-5 wt. % Ir, 0.25-5 wt. % Sn and 1-5 wt. % Mg (by weight of the supported catalyst) supported on a refractory support. 17. The process of claim 15 wherein said catalyst further comprises Ru, Pd, Mn, Sm or Ce. 18. The process of claim 1 comprising avoiding exposure of said catalyst to a sulfur-containing compound at a temperature below about 500�� C. 19. The process of claim 1 wherein said contact time is no more than about 200 milliseconds. 20. The process of claim 1 carried out in a system comprising: an assembly comprising, in sequential flow arrangement, a short contact time reactor, a boiler and a sulfur condenser, said reactor comprising a feed gas inlet, an oxygen gas inlet, and said catalyst that is selective for catalyzing the partial oxidation of hydrogen sulfide to form elemental sulfur and water, and said condenser having a first process gas outlet and a liquid sulfur outlet; a primary hydrocarbon feed gas line in fluid communication with said reactor feed gas inlet; a water/sulfur vapor removal unit in fluid communication with said first process gas outlet, and having a second process gas outlet and a liquid water outlet; an amine absorption unit having an inlet in fluid communication with said second process gas outlet and with said primary hydrocarbon feed gas line, and having a regenerated hydrogen sulfide gas outlet and a purified hydrocarbon gas outlet; and a secondary hydrocarbon feed gas line in fluid communication with said primary hydrocarbon feed gas line and with said reactor feed gas inlet, and adapted for receiving hydrogen sulfide gas from said regenerated hydrogen sulfide gas outlet. 21. The process of claim 1 carried out in a system comprising: an assembly comprising, in sequential flow arrangement, a short contact time reactor, a boiler and a sulfur condenser, said reactor comprising a feed gas inlet, an oxygen gas inlet, and said catalyst that is selective for catalyzing the partial oxidation of hydrogen sulfide to form elemental sulfur and water, and said condenser having a first process gas outlet and a liquid sulfur outlet; a primary hydrocarbon feed gas line in fluid communication with said reactor feed gas inlet; a water/sulfur vapor removal unit in fluid communication with said first process gas outlet, and having a second process gas outlet and a liquid water outlet; an amine absorption unit having an inlet in fluid communication with said second process gas outlet and having a regenerated hydrogen sulfide gas outlet and a purified hydrocarbon gas outlet; a return hydrogen sulfide line in fluid communication with said regenerated hydrogen sulfide gas outlet and said primary hydrocarbon feed gas line; and a return hydrocarbon product line in fluid communication with said return hydrogen sulfide line and said purified hydrocarbon gas outlet. 22. The process of claim 1 wherein said process generates a CO2 yield of about 10% or less. 23. The process of claim 1 wherein said process generates a CO yield of about 1.4% or less. 24. A process of sweetening a light hydrocarbon feed gas stream containing at least one C1-C5 hydrocarbon component and an H2S component, the process comprising: at a temperature above about 500�� C., at a molar ratio of H2S to O2 in the range of about 2:1 to about 5:1, and in the presence of a H2S-selective catalyst comprising Pt, Rh, Ir, Sn and Mg, partially oxidizing the H2S component in said light hydrocarbon feed gas stream to form elemental sulfur and water, while convening the light hydrocarbon in said feed gas stream to CO or CO2 with a CO yield of about 1.4% or less and a CO2 yield of about 10% or less; recovering unconverted light hydrocarbon; and recovering liquid sulfur. 25. The process of claim 24 wherein said catalyst comprising Pt, Rh, Ir, Sn and Mg is supported on a refractory support. 26. The process of claim 25 wherein said refractory support is selected from the group consisting of alumina, zirconia, and magnesium oxide. 27. The process of claim 25 wherein said catalyst comprises 0.25-5 wt. % Pt, 0.25-5 wt. % Rh, 0.25-5 wt. % Ir, 0.25-5 wt. % Sn and 1-5 wt. % Mg (by weight of the supported catalyst) supported on a refractory support. 28. A process of sweetening a light hydrocarbon feed gas stream containing at least one C1-C5 hydrocarbon component and an H2S component, said light hydrocarbon feed gas stream containing from 25 vol. % to 50 vol. % H2S, the process comprising: at a temperature above about 500�� C., at a molar ratio of H2S to O2 in the range of about 2:1 to about 5:1, and in the presence of a H2S-selective catalyst comprising Pt, Rh, Ir, Sn, and Mg on a refractory support, partially oxidizing the H2S component in said light hydrocarbon feed gas stream to form elemental sulfur and water, while converting said light hydrocarbon component to CO or CO2 with a hydrocarbon conversion of 32 mole % or less, a CO yield of about 4.6% or less, and a CO2 yield of about 28% or less; recovering unreacted light hydrocarbon; and recovering liquid sulfur. 29. The process of claim 28 wherein said catalyst comprises 0.25-5 wt. % Pt, 0.25-5 wt. % Rh, 0.25-5 wt. % Ir, 0.25-5 wt. % Sn and 1-5 wt. % Mg (by weight of the supported catalyst) supported on a refractory support. 30. A process of sweetening a light hydrocarbon feed gas stream containing methane and an H2S component, the process comprising: at a temperature above about 500�� C., at a molar ratio of H2S to O2 in the range of about 2:1 to about 5:1, and in the presence of a H2S-selective catalyst comprising Pt, Rh, Ir, Sn, and Mg on a refractory support, partially oxidizing the H2S component in said light hydrocarbon feed gas stream to form elemental sulfur and water, said process achieving a methane conversion to CO or CO2 of 0.13% or less during said H2S partial oxidation.
연구과제 타임라인
LOADING...
LOADING...
LOADING...
LOADING...
LOADING...
이 특허에 인용된 특허 (75)
Beavon David K. (Pasadena CA), Apparatus for the production of sulfur from mixtures of hydrogen sulfide and fixed nitrogen compounds.
Terorde Robert Johan Andreas Maria,NLX ; Geus John Wilhelm,NLX, Catalyst for the selective oxidation of sulfur compounds to elemental sulfur, process for preparing such catalyst and p.
Alkhazov Tofik G. O. (Baku SUX) Meissner ; III Roland E. (La Canada CA), Catalysts and process for selective oxidation of hydrogen sulfide to elemental sulfur.
Jennifer Schaefer Feeley ; John Henry Dunsmuir ; Sebastian Carmen Reyes ; Paul Joseph Berlowitz ; John Frances Brody ; Bruce Anthony Derites ; Wenyih Frank Lai ; Mark Leland Tiller ; Hyung Su, Catalytic oxidation process.
Anna Lee Y. Tonkovich ; Yong Wang ; Sean P. Fitzgerald ; Jennifer L. Marco ; Gary L. Roberts ; David P. Vanderwiel ; Robert S. Wegeng, Chemical reactor and method for gas phase reactant catalytic reactions.
Tonkovich, Anna Lee Y.; Wang, Yong; Wegeng, Robert S.; Gao, Yufei, Method and apparatus for obtaining enhanced production rate of thermal chemical reactions.
Tonkovich, Anna Lee Y.; Wang, Yong; Wegeng, Robert S.; Gao, Yufei, Method and apparatus for obtaining enhanced production rate of thermal chemical reactions.
Philippe Andre,FRX ; Savin-Poncet Sabine,FRX ; Nougayrede Jean,FRX ; Ledoux Marc,FRX ; Pham Huu Cuong,FRX ; Crouzet Claude,FRX, Method and catalyst for catalytically oxidizing a low concentration of H.sub.2 S in a gas to give sulphur.
Ledoux Marc,FRX ; Jean Nougayrede,FRX ; Sabine Savin-Poncet,FRX ; Cuong Pham Huu,FRX ; Nicolas Keller,FRX ; Claude Crouzet,FRX, Method and catalyst for direct sulphur oxidation of H2S contained in a gas.
Heisel Michael (Pullach DEX) Marold Freimut (Ahornwohlbach DEX) Gwinner Martin (Hohenschaftlarn DEX), Method for the recovery of elemental sulfur from a gas mixture containing H2S.
Ashbrook Clifford L. (Route 2 ; Box 439 Spicewood TX 78669) Scarborough Douglas B. (Route 17 ; Box 124-A3 San Antonio TX 78238), Natural gas desulphurizing apparatus and method.
Triplett Kelly B. (Stamford CT) Burk Johst H. (Mohegan Lake NY) Sherif Fawzy G. (Stony Point NY) Vreugdenhil Willem (Katonah NY), Non-oxide metal ceramic catalysts comprising metal oxide support and intermediate ceramic passivating layer.
Suggitt Robert M. (Wappinger Falls NY) Wilson Raymond F. (Fishkill NY) Fong Wing-Chiu F. (Yorktown Heights NY), Process for continuously controlling the heat content of a partial oxidation unit feed-gas stream.
Sugier Andre (Rueil per atlas Malmaison FRX) Courty Philippe (Houilles FRX) Deschamps Andre (Noisy le Roi FRX) Gruhier Henri (Chatillon sous Bagneux FRX), Process for oxidizing sulfur and sulfur compounds.
Marc Ledoux FR; Jean Nougayrede FR; Cuong Pham-Huu FR; Nicolas Keller FR; Sabine Savin-Poncet FR; Claude Crouzet FR, Process for oxidizing the H2S contained at low concentration in a gas directly to sulphur by catalytic means and in the vapour pause.
Child Edward T. (Tarrytown NY) Lafferty ; Jr. William L. (Hopewell Junction NY) Suggitt Robert M. (Wappingers Falls NY) Jahnke Frederick C. (Rye NY), Process for producing dry, sulfur-free, CH4-enriched synthesis or fuel gas.
Hellmer Lars (Cologne DEX) Keunecke Gerhard (Geyen DEX) Lell Rainer (Kerpen DEX) Al-Muddarris Ghazi R. (Cologne DEX) Pachaly Reinhard (Kerpen DEX) Stauffer Adolf (Pulheim DEX) Vangala V. Rao (Cologne, Process for producing hydrogen and sulphur from hydrogen sulphide.
Li Kuo-Tseng (Taichung TWX) Huang Min-Ya (Taichung TWX) Cheng Wen-Da (Taichung TWX), Process for recovering elemental sulfur by selective oxidation of hydrogen sulfide.
Lagas Jan A. (Monnickendam NLX) Borsboom Johannes (Rijswijk NLX) Berben Pieter H. (Zeist NLX) Geus John W. (Bilthoven NLX), Process for recovering sulfur from sulfur-containing gases.
Kvasnikoff Georges (Monein FRX) Nougayrede Jean (Pau FRX) Philippe Andre (Orthez FRX), Process for the production of sulphur from at least one sour gas containing hydrogen sulphide and a fuel effluent and th.
Kiliany Thomas R. (West Chester PA) McWilliams John P. (Woodbury NJ) Pappal David A. (Haddonfield NJ), Reduction of sulfur content in a gaseous stream.
Li Kuo-Tseng (Taichung TWX) Huang Min-Ya (Taichung TWX) Cheng Wen-Da (Taichung TWX), Selective oxidation of hydrogen sulfide in the presence of bismuth-based catalysts.
Keller, Alfred E.; Allison, Joe D.; Ramani, Sriram; Pruitt, Terry D., Short contact time catalytic partial oxidation process for recovering sulfur from an H2S containing gas stream.
Keller, Alfred E.; Ramani, Sriram; Allison, Joe D.; Pruitt, Terry D., Short contact time catalytic sulfur recovery system for removing H2S from a waste gas stream.
McGovern John J. (Tulsa OK) Pendergraft Paul T. (Tulsa OK) Lee Min-Hsiun (Tulsa OK), Sulfur recovery process using metal oxide absorbent with regenerator recycle to Claus catalytic reactor.
Taylor ; Jr. James H. ; Glass ; Jr. James P. ; Say Geoffrey R. ; O'Connor Richard P., Very low sulfur gas feeds for sulfur sensitive syngas and hydrocarbon synthesis processes.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.