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A method for adjusting hydrogen to carbon monoxide ratio of syngas contaminated by sulfur impurities involving a water gas shift (WGS) reaction. In light of the presence of the sulfur impurities, the WGS can be implemented as a sour gas shift. WGS can provide good results by using a non-sulfided catalyst. Conditions can be employed which contribute to further enhanced CO-conversion in the reaction. The hydrocarbons or derivatives thereof obtainable from the method can further be refined and used for production of fuels or lubricants for combustion engines.

Titel:	METHOD FOR ADJUSTING HYDROGEN TO CARBON MONOXIDE RATIO IN SYNTHESIS GAS
Autor/in / Beteiligte Person:	EILOS, Isto ; KOSKINEN, Jukka ; TIITTA, Marja ; TOPPINEN, Sami ; VUORI, Heli
Link:	Zum Volltext
Veröffentlichung:	2013
Medientyp:	Patent
Sonstiges:	Nachgewiesen in: USPTO Patent Applications Sprachen: English Document Number: 20130005838 Publication Date: January 3, 2013 Appl. No: 13/539862 Application Filed: July 02, 2012 Assignees: Neste Oil Oyj (Espoo, FI) Claim: 1. A method for adjusting hydrogen to carbon monoxide ratio in syngas, the method comprising: providing a syngas produced from a biomass raw material, said syngas comprising carbon monoxide, hydrogen, 10-40 vol-% of carbon dioxide, and at least one sulfur derivative as an impurity; and converting at least a part of said carbon monoxide in the presence of steam to carbon dioxide and hydrogen with a water gas shift reaction in the presence of a FeCr catalyst. Claim: 2. The method according to claim 1, wherein said syngas further comprises NH3. Claim: 3. The method according to claim 1, wherein a content of said sulfur derivative in said syngas is less than 900 ppm. Claim: 4. The method according to claim 1, wherein said water gas shift reaction is conducted at a temperature between 270° C. and 510° C. Claim: 5. The method according to claim 1, wherein said water gas shift reaction is conducted at a pressure between 1 to 10 bar. Claim: 6. The method according to claim 1, wherein said FeCr catalyst is not sulfided prior to use in the water gas shift reaction. Claim: 7. The method according to claim 1, further comprising converting the syngas to a product selected from the group consisting of alcohols, alkyl carbonates and hydrocarbons having a carbon number from C4 to C90. Claim: 8. A method for producing hydrocarbons from a biomass raw material, the method comprising: gasifying a biomass raw material in the presence of oxygen to produce a gas comprising carbon monoxide, 10-40 vol-% of carbon dioxide, hydrogen, hydrocarbons, and at least one sulfur derivative as impurity; converting at least a part of said carbon monoxide to carbon dioxide and hydrogen with a water gas shift reaction in the presence of a FeCr catalyst; converting in a Fisher-Tropsch reactor at least a part of the carbon monoxide and hydrogen into a hydrocarbon composition comprising C4-C90 hydrocarbons; and recovering at least a part of the C4-C90 hydrocarbons. Claim: 9. The method according to claim 8, further comprising reforming the syngas downstream from gasifying the biomass raw material and upstream from said water gas shift reaction. Claim: 10. The method according to claim 8, further comprising at least one wash step. Claim: 11. The method according to claim 8, wherein the recovered hydrocarbons are treated to produce a fuel or lubricant for combustion engines. Claim: 12. The method according to claim 8, comprising producing hydrocarbons suitable for fuel applications having distillation cut points in a range of about 40 to 350° C. Claim: 13. The method according to claim 8, comprising producing hydrocarbons suitable for lubricant applications, said hydrocarbons having carbon numbers in a range of 30 to 40. Claim: 14. The method according to claim 1, wherein the content of said sulfur derivative in said syngas is from 30 ppm to 500 ppm. Claim: 15. The method according to claim 1, wherein said water gas shift reaction is conducted at a temperature between 300° C. and 510° C. Claim: 16. The method according to claim 1, wherein said water gas shift reaction is conducted at a temperature between 380° C. and 430° C. Claim: 17. The method according to claim 4, wherein said water gas shift reaction is conducted at a pressure between 1 to 10 bar. Claim: 18. The method according to claim 1, wherein said water gas shift reaction is conducted at a pressure between 3 to 6 bar. Claim: 19. The method according to claim 4, wherein said water gas shift reaction is conducted at a pressure between 3 to 6 bar. Claim: 20. The method according to claim 9, further comprising at least one wash step. Claim: 21. The method according to claim 8, comprising producing hydrocarbons suitable for fuel applications having distillation cut points in a range of 180 to 300° C. Current U.S. Class: 518/703 Current International Class: 01; 07; 07; 07; 07

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METHOD FOR ADJUSTING HYDROGEN TO CARBON MONOXIDE RATIO IN SYNTHESIS GAS