Process for the production of synthesis gas with conversion...

Details Process for the production of synthesis gas with conversion... Process for the production of synthesis gas with conversion...

2007-08-07

2010-12-07

Parsa, Jafar (Department: 1621)

Chemistry: fischer-tropsch processes; or purification or recover

Treatment of feed or recycle stream

C518S700000, C518S702000, C518S703000, C518S704000

Reexamination Certificate

active

07846979

ABSTRACT:
Process for the production of liquid hydrocarbons from a feedstock that comprises at least one elementary feedstock from the group of biomass, coal, lignite, petroleum residues, methane, and natural gas, comprising: at least one stage a) for gasification of the feedstock by partial oxidation and/or steam reforming to produce a synthesis gas SG; a stage b) for separating CO2 from SG and a portion of the effluent of the subsequent stage c); the mixing of a portion of the CO2 that is separated with a gas of an H2/CO ratio of more than 3; a stage c) for partial conversion with hydrogen, thermal or thermocatalytic, of the CO2 that is present in said first mixture according to the reaction: CO2+H2→CO+H2O in a specific reaction zone that is separated from said gasification zone or zones; a stage d) for Fisher-Tropsch synthesis on a synthesis gas that comprises at least a portion of SG and at least a portion of the CO that is produced by the conversion of CO2 into hydrogen.

REFERENCES:
patent: 5714657 (1998-02-01), DeVries
patent: 2004/0245086 (2004-12-01), Steynberg et al.
patent: 2005/0209347 (2005-09-01), Bowe
patent: 2 168 718 (1986-06-01), None
patent: WO 03/070629 (2003-08-01), None
Partial French Search Report issued in FR 0607270 dated Mar. 29, 2007.
H. H. Gunardson et al., “Produce Co-Rich Synthesis Gas”, Petroleum Refiner, Gulf Publishing Co., vol. 78, No. 4, (1999) pp. 87-93.
Song, et al., “Technologies for direct production of flexible H2/CO synthesis gas”, Energy Conversion and Management 47 (2006) - pp. 560-569, available on-line Jul. 14, 2005.

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