Hydrogen recovery from hydrocarbon synthesis processes

Details Hydrogen recovery from hydrocarbon synthesis processes Hydrogen recovery from hydrocarbon synthesis processes

2008-07-29

2008-07-29

Parsa, Jafar (Department: 1621)

Chemistry: fischer-tropsch processes; or purification or recover

Liquid phase fischer-tropsch reaction

C518S709000, C518S722000, C518S726000

Reexamination Certificate

active

10844378

ABSTRACT:
The invention relates to a process for producing a hydrogen-rich stream from a hydrogen-depleted stream. More particularly, the invention relates to a hydrocarbon synthesis process, by way of example, a Fischer Tropsch process, from which both hydrocarbons and high purity hydrogen are obtained. The process comprises contacting the hydrogen-depleted stream with a first reverse-selective membrane and a second reverse-selective membrane to provide a CO2-enriched permeate and a hydrogen-containing retentate. The high purity hydrogen is produced from the hydrogen-containing retentate. The high purity hydrogen thus obtained may be used in a process selected from the group consisting of upgrading hydrocarbons produced from the hydrocarbon synthesis process, hydrotreating a natural gas stream, recycling to the hydrocarbon synthesis reaction unit, high purity hydrogen production, catalyst rejuvenation, and combinations thereof.

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