NOVEL INTEGRATION FOR CO AND H2 RECOVERY IN GAS TO LIQUID PROCESSES

摘要

Methods for integrating a syngas production unit with a gas to liquid (GTL) system, and a power generation unit to efficiently use hydrogen and carbon monoxide contained in the syngas produced from methane-containing hydrocarbon feedstock (e.g. natural gas). Membrane separation and other separation technologies are used to separate components of an off-gas stream from the GTL system and associated down stream hydroprocessing unit, and recycle the stream components advantageously to the process, or use them in utility generation units. A hydrogen-recovery membrane unit and a CO-recovery unit are utilized also to produce a syngas feed stock to the GTL system with an H₂/CO ratio favorable for the production on synthetic liquid hydrocarbons. In one embodiment, pure hydrogen is also produced in a PSA unit, whose feed stream enriched in H₂ by a membrane to provide hydrogen needed for liquid product hydroprocessing systems.