| 摘要 |
The invention relates to a method for providing a methane-rich product gas. In a first operating mode, a reactant gas which has hydrogen and carbon dioxide is catalytically methanated into a gas mixture which satisfies a specified quality criterion relating to the gas mixture composition and which is provided as the product gas. In a second operating mode, the catalytic methanation is reduced, in particular stopped, by reducing, in particular cutting off, the reactant gas feed. A transition between the two operating modes is carried out dependent on an availability of the hydrogen. A gas mixture which is produced upon the transition and which does not satisfy the quality criterion is at least partly recycled as part of the providing method. The invention also relates to an arrangement which is suitable for carrying out the method. |
