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Biogas purification and methane-enrichment

Introduction. Biogas from anaerobic digestionComposition:CH4 : 65-70%CO2 : 30-35%Water vapourTraces of H2S, oxidised sulphur compounds, H2, halogenated compounds (landfills), siloxanes,

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Biogas purification and methane-enrichment

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    1. Biogas purification and methane-enrichment Lise Appels1, Raf Dewil1, Jan Baeyens2,3 1 Department of Chemical Engineering, Katholieke Universiteit Leuven 2 Department of Chemical Engineering, University of Birmingham 3 School of Engineering, University of Warwick

    2. Introduction Biogas from anaerobic digestion Composition: CH4 : 65-70% CO2 : 30-35% Water vapour Traces of H2S, oxidised sulphur compounds, H2, halogenated compounds (landfills), siloxanes,… Not useable as such for introduction in gas grid or as CNG Need to increase energy content and remove trace gases

    3. Removal of impurities Required gas quality = function of application Purification methods Traditional: scrubbing, pressure swing adsorption, cryogenics Gas membranes

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