| 摘要 |
<p>A process is disclosed for production of a methane rich product gas comprising the steps of (a) providing a feed comprising carbon oxide such as carbon monoxide and/or carbon dioxide, hydrogen and at least 1% C2+ hydrocarbons. (b) adding a flow comprising steam to said feed forming a reacting feed mixture, (c) reacting said reacting feed mixture in the presence of a catalyst forming a product gas rich in methane (d) withdrawing the methane rich product gas wherein the ratio of water molecules to carbon atoms in higher hydrocarbons, S/HHC, is below 25, the maximum catalyst temperature T is at least 460°C, preferably at least 480°C, and even more preferably 500°C, and the maximum catalyst temperature is less than the critical carbon formation temperature for the S/HHC value for said catalyst. In a preferred embodiment the recycle is driven by an ejector with steam feed as motive gas.</p> |
