Patent ID: 9458014
Filing Date: 2016-10-04
CPC Classification: C01B,C10J,C10K,F02C,F05D,Y02E,Y02P

Claim Text:
1. A method of capturing and isolating carbon dioxide and hydrogen gases from a high temperature synthesis gas stream containing CO and sulfur compounds, comprising: reducing the temperature of said high temperature synthesis gas stream; removing sulfur compounds present in said synthesis gas stream; converting CO present in said synthesis gas stream to carbon dioxide using a first high temperature water-gas shift reaction; converting CO in said synthesis gas stream to carbon dioxide using a second low temperature water-gas shift reaction; converting CO present in said synthesis gas stream to carbon dioxide using a third low temperature water-gas shift reaction; separating out hydrogen present in said synthesis gas stream following completion of said first, second and third water-gas shift reactions; condensing water present in said synthesis gas stream following said first, second and third water-gas shift reactions; recycling said condensed water following said first, second and third water-gas shift reactions; and recycling said condensed water to the synthesis gas stream upstream of said first and second water-gas shift reactions.