초록 ▼

A system and process for the production of synthesis gas with a specific H2CO ratio, for example, 0.7 to 1.2 and a low residual methane content, for example, less than 5 percent (5%). Excess hydrogen from the syngas feed stream is removed by a membrane as a permeate and the retentate gas cryogenical

A system and process for the production of synthesis gas with a specific H2CO ratio, for example, 0.7 to 1.2 and a low residual methane content, for example, less than 5 percent (5%). Excess hydrogen from the syngas feed stream is removed by a membrane as a permeate and the retentate gas cryogenically separated.

대표청구항 ▼

[ what is claimed is:] [1.]1. A process for adjusting the molar ratio of H.sub.2 /CO and reducing the methane level in a syngas feed stream which contains hydrogen, carbon monoxide and methane, and which process comprises:a) removing excess hydrogen from the syngas feed stream by a semipermeable mem

[ what is claimed is:] [1.]1. A process for adjusting the molar ratio of H.sub.2 /CO and reducing the methane level in a syngas feed stream which contains hydrogen, carbon monoxide and methane, and which process comprises:a) removing excess hydrogen from the syngas feed stream by a semipermeable membrane, to provide an excess hydrogen permeate stream and a retentate syngas stream of selected H.sub.2 /CO molar ratio and methane;b) cryogenically separating the methane from the retentate syngas stream; andc) recovering a syngas product stream of selected and lower H.sub.2 /CO molar ratio and lower the methane content than the syngas feed stream.