Process for converting biogas to a gas rich in methane
AssigneeHaldor Topsoe A/S
InventorJohn Bogild Hansen
Life of this patent
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Abstract
Process for converting biogas to a gas rich in methane comprising the steps of: —mixing a carbon dioxide-comprising biogas with steam to form a mixture comprising carbon dioxide, methane and steam; electrolysing the mixture comprising carbon dioxide, methane and steam in a high temperature solid oxide electrolyser cell unit, to obtain a gas comprising mainly hydrogen and carbon monoxide; catalytically converting hydrogen and carbon monoxide in the gas comprising hydrogen and carbon monoxide to methane in one or more methanation steps to obtain a gas rich in methane.
Claims14
Process for converting biogas to a gas rich in methane comprising the steps of:
- mixing a carbon dioxide-comprising biogas with steam to form a mixture comprising carbon dioxide, methane and steam;
- electrolysing the mixture comprising carbon dioxide, methane and steam in a high temperature solid oxide electrolyser cell unit, to obtain a gas comprising mainly hydrogen and carbon monoxide;
- and
- catalytically converting hydrogen and carbon monoxide in the gas comprising hydrogen and carbon monoxide to methane in one or more methanation steps to obtain a gas rich in methane.
Dependencies are inferred from the claim text.