| 摘要 |
A process is described for producing a methane-containing gas mixture comprising the steps of: (i) passing a first feed gas mixture comprising hydrogen and carbon dioxide through a bed of methanation catalyst to react a portion of the hydrogen with at least a portion of the carbon dioxide and form a methane-containing gas mixture containing residual hydrogen, (ii) adding an oxygen-containing gas to the methane-containing gas mixture containing residual hydrogen to form a second feed gas mixture, and (iii) passing the second feed gas mixture through a bed of an oxidation catalyst to reactthe residual hydrogen and oxygen to form a hydrogen depleted methane-containing gas mixture. The first feed gas mixture may be a synthesis gas comprising hydrogen, carbon dioxide and carbon monoxide, and may be desulphurised before the methanation step. |
