Patent ID: 8408005

Claim:
A process for H 2 recovery from a H 2 -containing gas stream from a gasifier, the process comprising: feeding the H 2 -containing gas stream to a first hydrogen transport membrane (HTM); feeding a first portion of nitrogen produced in an air separation unit (ASU) to the first HTM as a HTM permeate sweep stream; recovering a first H 2 -N 2 fuel mixture from the first HTM and supplied to a gas turbine generator; feeding a retentate stream from the first HTM to a second hydrogen transport membrane (HTM); feeding a second portion of nitrogen produced in the ASU to the second HTM for use as a HTM permeate sweep stream; and recovering a second H 2 -N 2 fuel mixture from the second HTM and supply as a fuel to a duct burner of a heat recovery steam generator.