C - Chemistry – Metallurgy – 10 – J
Patent
C - Chemistry, Metallurgy
10
J
48/26
C10J 3/46 (2006.01) C01B 3/34 (2006.01) C21B 13/00 (2006.01)
Patent
CA 1106178
PROUDUCTION OF CARBON MONOXIDE BY THE GASIFICATION OF CARBONACEOUS MATERIALS 75E75 Abstract An increased amount of carbon monoxide is produced in a process for the gasification of carbonaceous materials by employing a reverse water gas shift reaction in the process. Raw gas produced by the gasification of carbo- naceous materials contains predominantly carbon monoxide and hydrogen along with hydrogen sulfide, carbon dioxide, water and methane. Carbon dioxide is separated from the raw gas as is the hydrogen sulfide. Thereafter, the carbon monoxide is separated from the raw gas to yield one portion of the carbon monoxide product gas. After the removal of carbon monoxide the raw gas con- sists of a hydrogen-rich gas. The hydrogen-rich gas which may be purified is mixed with the previously separated carbon dioxide along with any imported carbon dioxide and along with a recycle gas from a catalytic reaction loop. This mixed gas is conveyed to a heat exchanger in the catalytic reaction loop and passed through a heat exchanger located immediately after the gasifier through which the raw product gas passes. In the heat exchanger the hot raw ` product gas indirectly contacts the mixed gas and transfers some of its sen- sible heat to the mixed gas to effect the catalytically promoted, endothermic reaction of carbon dioxide and hydrogen to produce a carbon monoxide-containing gas. The indirect contacting for heat exchange is conducted in a manner that limits the accumulation of elemental carbon from any of the carbon-containing components of the mixed gas. The carbon monoxide is separated from the other components of the carbon monoxide-containing gas to yield a second portion of carbon monoxide gas which is then combined with the first portion of carbon monoxide product gas to give the increased amount of carbon monoxide product gas.
317842
Borden Ladner Gervais Llp
Koppers Company Inc.
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