Process using natural gas partial oxidation to condition syngas from gasification of other fuels

摘要

A method of processing synthesis gas improves the quality of the synthesis gas by using a water gas shift reaction to increase the molar ratio of hydrogen to carbon monoxide (H2:CO) in an efficient manner. A first steam of hot natural gas-based synthesis gas having a first higher molar ratio of H2:CO is combined with a second stream of quenched synthesis gas having a second lower molar ratio of H2:CO to provide a blend of synthesis gas having a third molar ratio of H2:CO that is between the first and second molar ratios. A non-catalytic water gas shift reaction increases the molar ratio of H2:CO to a fourth molar ratio that is higher than the third molar ratio, and can be about equal to or greater than the first molar ratio without supplying external heat.

主权项

1. A method of processing synthesis gas, comprising the steps of:
providing a first stream of natural gas-based synthesis gas provided at a temperature of at least about 1750° F. having a first molar ratio of H2:CO; providing a second stream of synthesis gas provided at a temperature less than about 1000° F. having a second molar ratio of H2:CO that is lower than the first molar ratio of H2:CO; combining the first and second streams of synthesis gas in a thermal shift unit, and blending the first and second streams of synthesis gas to form a blend of synthesis gas having a third molar ratio of H2:CO that is in between the first and second molar ratios of H2:CO; applying a water gas shift reaction to the blend of synthesis gas to increase the molar ratio of H2:CO in the blend of synthesis gas to a fourth molar ratio of H2:CO that is higher than the third molar ratio of H2:CO.