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Recycling of carbon dioxide to produce ethanol

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Recycling of carbon dioxide to produce ethanol ( recycling-carbon-dioxide-produce-ethanol )

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Available online at www.sciencedirect.com Energy Procedia 37 (2013) 6679 – 6686 GHGT-11 Recycling of carbon dioxide to produce ethanol Youness El Fouih, Chakib Bouallou* MINES ParisTech, Centre Energétique et Procédés (CEP) 60, Bd Saint-Michel 75006 Paris,France Abstract In the coming years, a range of technological solutions aimed at reducing CO2 emissions should be developed. The objective of this paper is to study the technical feasibility of CO2 recycling into ethanol using solid oxide electrolysis cells (SOEC) technology, simulate the whole process using Aspen assessment and a carbon footprint. The results of the economic analysis demonstrated that the ethanol production plant can deliver ethanol at a cost of $1.1/kg, assuming an internal rate of return on investment of 8%. Main challenges for this process are improvement of ethanol synthesis reaction catalysts and the SOEC performance. © 2013 The Authors. Published by Elsevier Ltd. © 2013 The Authors. Published by Elsevier Ltd. Selection and//orrppeeer-rr-erveiveiwewunudnedrerersepsopnosnibsilbitiylitoyf oGfHGGHTGT Keywords : CO2 recycling; ethanol production; process simulation; SOEC; H2O and CO2 Colelectrolysis; Syngas; 1. Introduction With the objective of limiting average temperature increase in the long term, it becomes necessary to reduce by 2050 the global emissions of carbon dioxide (CO2), which is the main greenhouse gas (GHG). These emissions should be reduced by 50 to 85 % compared to the measured level in 2000. It is therefore essential to develop in the upcoming years, a range of technological solutions for the limitation and reduction of CO2 emissions. One of these solutions is to capture and recycle the CO2 emitted. The main challenge of this industry is to find new applications, to improve and develop existing ones, while ensuring a neutral impact on the environment. The CO2 could be used as raw material in industrial processes, through access to non-fossil energy, it is transformed chemically or biologically to produce biofuels, chemicals or pharmaceuticals. There are several possible pathways of CO2 recycling, and these pathways can be classified into three groups. The first group concerns the using of CO2 without transformation, meaning that dioxide carbon is * Corresponding author. Tel.: +331 69 19 17 00; fax: +331 69 19 45 01. E-mail address: chakib.bouallou@mines-paristech.fr. 1876-6102 © 2013 The Authors. Published by Elsevier Ltd. Selection and/or peer-review under responsibility of GHGT doi:10.1016/j.egypro.2013.06.600

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