METHOD AND SYSTEM FOR PRODUCING A SYNTHESIS GAS IN AN OXYGEN TRANSPORT MEMBRANE BASED REFORMING SYSTEM USING A COMBINED FEED STREAM

摘要

A method and system for producing a synthesis gas in an oxygen transport membrane based reforming system that utilizes a combined feed stream having a steam to carbon ratio between about 1.6 and 3.0 and a temperature between about 500° C. and 750° C. The combined feed stream is comprised a pre-reformed hydrocarbon feed, superheated steam, and a reaction product stream created by the reaction of a hydrogen containing stream reacted with the permeated oxygen at the permeate side of the oxygen transport membrane elements.

主权项

1. A method for producing a synthesis gas in an oxygen transport membrane based reforming system, the method comprising the steps of:
separating an oxygen containing stream into an oxygen permeate and an oxygen depleted retentate stream using a plurality of oxygen transport membrane elements disposed in the oxygen transport membrane based reforming system; reacting a hydrogen containing stream fed to a permeate side of the oxygen transport membrane elements with the oxygen permeate to generate a reaction product stream and heat; transferring the heat via convection to the oxygen depleted retentate stream and via radiation to at least one catalyst containing reforming reactor configured to produce a synthesis gas stream; pre-treating a hydrocarbon containing feed stream by adding steam to form a pre-treated reformer feed stream; combining the pre-treated reformer feed stream with the reaction product stream to produce a combined feed stream having a steam to carbon ratio between about 1.6 and 3.0 and a temperature between about 500° C. and 750° C.; reforming the combined feed steam in the at least one catalyst containing reforming reactor in the presence of the catalyst and the heat generated by the reaction of the hydrogen containing stream and permeated oxygen to produce a synthesis gas stream, the at least one catalyst based reforming reactor disposed proximate the oxygen transport membrane elements.