Introducing Renewable Electricity to increase Biogas Production Potential
2010 (English)In: International Conference on Applied Energy 2010, 2010Conference paper (Refereed)
Facing the challenge of CO2 reduction in the transport sector, the focus on alternative fuels has been growing rapidly. Several fuels and production methods have been proposed which illustrate various aspects of how to contribute to CO2 mitigation.This paper presents how biogas production from a given amount of biomass may be increased. To enhance biogas production, process improvements for today’s digestion process and also biogas produced from biomass gasification are suggested. Both biogas production via digestion and gasification of biomass produce CO2 as a by-product. To increase the biogas production, this green CO2 could be used to produce additional methane using the well-known Sabatier reaction. The hydrogen required for the reaction is proposed to originate from electrolysis of water, where the electricity needed is preferably produced from a renewable source, e.g. wind power. Reusing carbon in such manner reduces the need for fossil methane while supplying fuel to the transport sector.In this study, a base case scenario describing plants of typical sizes and efficiencies is presented for both digestion and gasification. It is shown that, using the Sabatier process on this base case, the methane production from gasification may be increased by about 140 %. For the digestion, the increase, including process improvements, is about 74 %. By using this method more biogas may be produced, without adding new raw material to the process. This would present a great way to meet society’s increasing demand for renewable fuels, while simultaneously reusing CO2.
Place, publisher, year, edition, pages
biogas, digestion, gasification, synthetic fuels, Sabatier reaction
IdentifiersURN: urn:nbn:se:kth:diva-29250OAI: oai:DiVA.org:kth-29250DiVA: diva2:392843
International Conference on Applied Energy 2010
QC 201101282011-01-282011-01-282016-08-16Bibliographically approved