Using fossil fuels to increase biomass-based fuel benefits

摘要

In the production of fuel such as ethanol from carbonaceous feed material such as biomass, a stream comprising hydrogen and carbon monoxide is added to the raw gas stream derived from the feed material, and the resulting combined stream is converted into fuel and a gaseous byproduct such as by a Fischer-Tropsch reaction. The gaseous byproduct may be utilized in the formation of the aforementioned stream comprising hydrogen and carbon monoxide.

主权项

1. A method comprising
(A) providing a gaseous product stream which is formed from fossil-fuel-based hydrocarbon feed and which comprises hydrogen and carbon monoxide at a mole ratio of H2:CO of at least 2.0:1; (B) forming a syngas stream that is derived from carbonaceous feed material and subjecting this syngas stream to partial oxidation; and (C) adding the gaseous product stream provided in step (A) to the partially oxidized syngas stream derived from carbonaceous feed material and containing hydrogen and CO, in a sufficient amount to form a mixed syngas stream having a H2:CO mole ratio higher than that of said partially oxidized syngas stream derived from carbonaceous feed material.