Abstract
Biogas can be upgraded by means of SOEC technology. Steam added to biogas and the CO2 content can be co-electrolyzed generating a CO rich synthesis gas. Alternatively hydrogen from steam electrolysis can be added to the biogas. In both cases thesynthesis gas is methanated. Waste heat from the methanator is used as feed for the SOEC. The paper will compare the energy and exergy efficiency as well as the economics of the two routes in future energy scenarios with a large power fraction from wind.
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