| 摘要 |
A process for altering the composition of a feed gas containing H2S equivalents is disclosed, wherein said feed gas comprises CO2 and H2S equivalents, typically H2S and optionally COS and CS2, preferably in a molar ratio of H2S equivalents to CO2 of below 1, preferably below 0.1, and optionally water, wherein the molar ratio of H2O to H2S equivalents is in the range of 0 - (5 + X), wherein X is a factor that takes into account the consumption of H2O during conversion of an equivalent of H2S to H2S. The process comprises (a) contacting the feed gas with a solid adsorbent at a temperature of 250 - 500 °C, to obtain a loaded adsorbent, (b) purging the loaded adsorbent with a purge gas comprising steam, thus producing a product stream which typically contains substantially equal levels of CO2 and H2S. The process further comprises a step (c) of regenerating the purged adsorbent by removal of water. The adsorbent comprises alumina and one or more alkali metals, such as potassium oxides, hydroxide or the like. |
