Patent ID: 8167960
Filing Date: 2012-05-01
Classification: C01B,C07C,C10G,C10J,C10K,C10L,Y02C,Y02E,Y02P

Abstract:
1. A method, comprising: (a) converting a hydrocarbon fuel into a synthesized gas comprising methane and other hydrocarbons, molecular hydrogen, sulfur compounds, and carbon oxides; (b) removing sulfur compounds from the synthesized gas to form a treated synthesized gas comprising at least most of the hydrocarbons, molecular hydrogen, and carbon oxides in the synthesized gas and a waste gas comprising at least most of the sulfur compounds in the synthesized gas; (c) converting molecular hydrogen and carbon oxides in the treated synthesized gas into methane to form a product gas, the product gas comprising carbon oxides and methane; (d) removing at least most of the carbon oxides from the product gas to form an output gas comprising at least most of the methane in the product gas and a second waste gas comprising at least most of the carbon oxides in the product gas; and (e) combusting at least a portion of the output gas and/or a fuel derived therefrom to provide energy for in-situ recovery of a fossil fuel source from a subsurface formation.