Mineral oils: processes and products – Chemical conversion of hydrocarbons – Reforming
Reexamination Certificate
2005-01-25
2005-01-25
Griffin, Walter D. (Department: 1764)
Mineral oils: processes and products
Chemical conversion of hydrocarbons
Reforming
C208S134000, C208S141000, C585S014000, C518S700000, C518S704000
Reexamination Certificate
active
06846404
ABSTRACT:
Provided is a process for converting CO2-rich natural gas into liquid fuel. The process includes introducing a CO2-rich natural gas feed stream into a synthesis gas formation reactor and then forming a synthesis gas. At least a portion of the synthesis gas is then introduced into a Fischer-Tropsch reactor. A Fischer-Tropsch process is conducted generating a Fischer-Tropsch product. A naphtha is separated from the Fischer-Tropsch product and introduced into a naphtha reformer. Hydrogen by-product is generated by reforming the naphtha to obtain a C6-C10product having a hydrogen to carbon ratio less than about 2.0. At least a portion of the hydrogen by-product is recirculated and mixed with the CO2-rich natural gas feed stream. The hydrogen by-product mixes with the CO2-rich natural gas feed stream such that at least a portion of the CO2present in the natural gas feed stream is converted into additional CO by a reverse water gas shift reaction so that the synthesis gas derived from the feed stream contains a volume amount of CO2that is less than a volume amount of CO2present in the feed stream prior to mixing with the hydrogen by-product. Finally, the additional CO is converted into hydrocarbons in the Fischer-Tropsch reactor.
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Arnold Jr. James
Burns Doane Swecker & Mathis L.L.P.
Chevron U.S.A. Inc.
Griffin Walter D.
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