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Evaluation of a pilot-scale sewage biogas powered 2.8 kWe Solid Oxide Fuel Cell: assessment of heat-to-power ratio and influence of oxygen content
de Arespacochaga, Nicolas; Valderrama Angel, César Alberto; Peregrina, Carlos; Mesa, Cristian; Bouchy, Lynne; Cortina Pallás, José Luís
Universitat Politècnica de Catalunya. Departament d'Enginyeria Química; Universitat Politècnica de Catalunya. SETRI - Grup de Tècniques de Separació i Tractament de Residus Industrials
Biogas from anaerobic digestion of organic matter is a promising renewable energy source and fuel cells appear as a breakthrough technology to improve the performance of the biogas-to-energy valorisation chain. The vast majority of studies addressing biogas energy recovery through Solid Oxide Fuel Cells published in recent years correspond to simulations and lab-scale performance with synthetic biogas. This paper assesses the pilot performance of a 2.8 kWe SOFC unit powered with cleaned sewage biogas for around 700 h in a Wastewater Treatment Plant. The biogas thorough treatment consisting of a biological desulphurisation with a biotrickling filter followed by a deep cleaning step based on adsorption is successful for removing sulphur compounds, siloxanes and hydrocarbons. The influence of the heat-to-power ratio on fuel cell performance is investigated operating the system at O/C ratio of 2, reforming temperature of 550 °C, stack temperature of 800 °C and at a constant voltage of 43 V. At optimized conditions for electrical production satisfying heat demand in the WWTP, system electrical and thermal efficiencies account for 34% and 28%. Cogeneration efficiency remains constant at around 59–62% for all the heat-to-power ratios tested. Furthermore, the impact of the oxygen content in the biogas is also studied
Àrees temàtiques de la UPC::Energies::Recursos energètics renovables::Biogàs
Biogas
Solid oxide fuel cells
Cogeneration of electric power and heat
Renewable energy sources
Biogas
Solid Oxide Fuel Cell
Gas reforming
Biogas treatment
Heat-to-power ratio
Energy valorisation
Biogàs
Cogeneració de calor i d'electricitat
Piles de combustible d'òxid sòlid
Energies renovables -- Innovacions tecnològiques
http://creativecommons.org/licenses/by-nc-nd/3.0/es/
info:eu-repo/semantics/submittedVersion
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