System and process for CO2 - detection by means of an H2 separator which Wärmeentschwefelungstechnologie used.

Method and system for collecting and isolating carbon dioxide and hydrogen gases from a high-temperature synthesis gas stream containing a substantial amount of CO and sulfur compounds, for use as a "clean" supplemental fuel comprising the steps of: lowering the temperature of high-temperature synthesis gas stream, removing substantially all of the present in the synthesis gas sulfur compounds, converting a first portion of CO to carbon dioxide in a first high temperature water gas shift reaction, converting a second quantum of CO into carbon dioxide by means of a second low-temperature water gas shift reaction, converting a third quantum of CO into carbon dioxide by means of a third low-temperature water gas shift reaction, and then separating substantially all hydrogen which is present in the treated syngas stream.