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Method of producing hydrogen-rich gas

  • US 5,066,476 A
  • Filed: 07/06/1990
  • Issued: 11/19/1991
  • Est. Priority Date: 08/02/1989
  • Status: Expired due to Fees
First Claim
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1. A method of producing a hydrogen-rich gas with a hydrogen content of at least 85 volume percent by gasifying of finely grained to pulverulent fuels at temperatures above a slag melting point, comprising the steps of gasifying a finely grained to pulverulent fuel in a gasifier to produce a partial oxidation crude gas;

  • indirectly cooling the partial oxidation crude gas in a waste heat boiler arranged after the gasifier;

    cooling again the partial oxidation crude gas after the waste heat boiler by adding converted circulating gas to the gas mixture;

    subjecting the produced gas mixture to a dry de-dusting;

    saturating the dedusted gas mixture with the use of a condensate produced during cooling of a product gas partial stream and washing at dew point of the gas mixture;

    subjecting the purified gas mixture after heating to a CO-conversion in the presence of a sulfur resistant catalyst in a conversion reactor;

    cooling a CO-poor gas leaving the conversion reactor to approximately its water vapor dew point and then subdividing in a circulating gas partial stream and a product gas partial stream;

    supplying the circulating gas partial stream after a compression as the converted circulating gas to the partial oxidation crude gas after the waste heat boiler for cooling the partial oxidation crude gas; and

    subjecting the product gas partial stream to a cooling for water vapor condensation, a de-sulfurization, a CO2 removal, and a further gas treatment for a further utilization.

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