Farzad Mohseni
Royal Institute of Technology – KTH, School of Chemical Science and Engineering, Chemical Engineering and Technology, Division of Energy Processes, Stockholm, Sweden
Martin Görling
Royal Institute of Technology – KTH, School of Chemical Science and Engineering, Chemical Engineering and Technology, Division of Energy Processes, Stockholm, Sweden
Per Alvfors
Royal Institute of Technology – KTH, School of Chemical Science and Engineering, Chemical Engineering and Technology, Division of Energy Processes, Stockholm, Sweden
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http://dx.doi.org/10.3384/ecp11057287Published in: World Renewable Energy Congress - Sweden; 8-13 May; 2011; Linköping; Sweden
Linköping Electronic Conference Proceedings 57:39, p. 287-294
Published: 2011-11-03
ISBN: 978-91-7393-070-3
ISSN: 1650-3686 (print), 1650-3740 (online)
This paper focuses on biogas and suggests methods for strongly increasing its production potential by combining gasification with hydrogen addition. By utilizing hydrogen produced from non-fossil energy sources; synthetic biogas can be obtained. The suggested methods are gasification combined with the Sabatier reaction; and hydrogasification. Both processes utilize hydrogen as a co-feedstock which can be produced via electrolysis from renewable electricity. Hydrogen addition to the gasification enhances the conversion efficiency and this synergy effect leads to higher fuel output compared to separate use of biomass and hydrogen.
The exploitation of renewable sources such as wind- and solar power is rapidly increasing since many countries have introduced incentives for these alternatives to expand. Since these are intermittent sources it would be highly beneficial to use electrolysis for balancing excess power in the grid during e.g. high loads or off-peak periods. Additionally; there would be an economical benefit as well since the price of electricity during these periods often is reduced.
The suggested methods could increase the biogas output by 130 – 150 % from the same amount of biomass as in conventional gasification. Contrary to upcoming fuels and solutions in the transport sector; biogas can be considered as conventional since a developed distribution system and storage capacity exists. It would also be a first step of introducing renewable electricity to the transport sector.
Synthetic biogas; Gasification; Transport sector; Hydrogen; Renewable fuels Introduction
