MULTI-STAGE SULFUR REMOVAL SYSTEM AND PROCESS FOR AN AUXILIARY FUEL SYSTEM

摘要

A system (600) for producing an auxiliary fuel stream (616) containing low concentration ofsulfur compounds from a primary fuel stream (610) includes a first separation stage (604) to separate a portion of a primary fuel stream (610) into a first vapor permeate stream (611) and a first retentate stream (617), a first separation stage partial condenser (603) connected to the first vapor permeate stream condensing a portion of the first vapor permeate stream into a first liquid stage stream (618) and a first vapor stage stream (612), and a second separation stage partial condenser condensing a portion of the first vapor stage stream into a second liquid stage. The first vapor permeate stream is preferably sent through a vapor phase reactive desulfurization catalyst reactor (607) to condition any sulfur compounds present into species that can be easily separated from the fuel'stream. The process includes isolating a first vapor permeate stream (611) and a first retentate stream (617) from a primary fuel stream by passing a portion (610) of the primary fuel stream through a first membrane separation stage (604), condensing a portion of the first vapor permeate stream in a first separation stage partial condenser (603) into a first liquid stage stream (618) and a first vapor stage stream (612), and passing the first vapor stage stream through a desulfurization reactor (607). The stream may then be processed through a sorbent bed (608) to effectively remove the sulfur compounds.