| 摘要 |
<p>Process for increasing the hydrogen content of a synthesis gas containing one or more sulphur compounds, the synthesis gas including hydrogen, carbon oxides and steam, and having a ratio defined as R═(H2—CO2)/(CO+CO2)≰0.6 and a steam to carbon monoxide ratio≰1.8, including the steps of (i) heating the synthesis gas; (iii) subjecting at least a portion of the heated synthesis gas to a first stage of water-gas shift in a first shift vessel containing a first sulphur-tolerant water-gas shift catalyst that is cooled in heat exchange with boiling water, to form a pre-shifted gas stream; and (iii) forming a shifted gas stream by subjecting at least a portion of the pre-shifted gas stream to a second stage of water-gas shift in a second shift vessel containing a second sulphur-tolerant water-gas shift catalyst that is cooled in heat exchange with a gas stream including the synthesis gas.</p> |
