| 摘要 |
<p>A high purity chemical synthesis gas is produced by reacting steam in a gasifier (32) with a carbonaceous feed material in the presence of a carbon-alkali metal catalyst and substantially equilibrium quantities of added hydrogen and carbon monoxide, fed in via nozzles (35), at reaction conditions to produce a raw product gas. The raw product gas is treated in vessels (38), (41) to remove solid particles, and in vessels (51, 54, 59 and 63) for the removal of steam and acid gases. The thus purified gas contains, primarily, carbon monoxide, hydrogen and methane. Methane is removed in a heat transfer unit (67) and a cryogenic unit (71), thereby recovering carbon monoxide and hydrogen from the treated gas as a chemical synthesis product gas. The remaining mixture of steam and methane is passed with further steam into a steam reforming furnace (76) where the methane reacts with the steam to produce carbon monoxide and hydrogen. The effluent from the reforming furnace (76) is passed into the gasifier (32).</p> |
