Method of producing hydrogen-rich gas
First Claim
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.
1 Assignment
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Accused Products
Abstract
A gas with a hydrogen content of at least 85 volume percent of partial oxidation crude gas is produced in a method including cooling of the gas after waste heat boiler of a gasifier by adding converted circulating gas in a quenching zone. The resulting gas mixture after corresponding gas treatment is subjected to a CO-conversion and then separated into a circulating gas partial stream and a product gas partial stream. The circulating gas partial stream is supplied back after a corresponding compression to the quenching zone, while the product gas partial stream after a so-called acid gas washing is subjected to a further gas treatment in correspondence with a desired use.
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Citations
13 Claims
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
- indirectly cooling the partial oxidation crude gas in a waste heat boiler arranged after the gasifier;
Specification