1. Effects of Pressure on High Temperature Steam and Carbon Dioxide Co-electrolysis
- Author
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Fabrice Mauvy, Guilhem Roux, Lucile Bernadet, Dario Montinaro, Jérôme Laurencin, Magali Reytier, Laboratoire d'Innovation pour les Technologies des Energies Nouvelles et les nanomatériaux (LITEN), Institut National de L'Energie Solaire (INES), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), SOLIDpower S.p.A., Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut Polytechnique de Bordeaux-Université de Bordeaux (UB), the European Union's Seventh Framework Programme (FP7/2007-2013) Fuel Cells and Hydrogen Joint Undertaking (FCH-JU-2013-1) under grant agreement n° 621173 (SOPHIA project). It has also received funding from European Horizon 2020 − Research and Innovation Framework Programme (H2020-JTI-FCH-2015-1) under grant agreement n° 699892 (ECO project). The work has also been partially supported by the 'Région Aquitaine'., and Université de Bordeaux (UB)-Institut Polytechnique de Bordeaux-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
020209 energy ,General Chemical Engineering ,Analytical chemistry ,02 engineering and technology ,Electrochemistry ,7. Clean energy ,Chemical reaction ,Modelling ,Methane ,law.invention ,Experiment ,chemistry.chemical_compound ,law ,Mass transfer ,Pressure ,0202 electrical engineering, electronic engineering, information engineering ,Polarization (electrochemistry) ,Yttria-stabilized zirconia ,Electrolysis ,Chemistry ,Co-electrolysis ,[CHIM.MATE]Chemical Sciences/Material chemistry ,021001 nanoscience & nanotechnology ,13. Climate action ,SOEC ,0210 nano-technology ,Syngas - Abstract
International audience; Experiments have been performed in pressurized co-electrolysis mode at 800 °C on a typical Ni-YSZ//YSZ//CGO-LSCF cell. The polarization curves and the composition of the produced syngas have been measured at 1 bar and 10 bar. It has been found that the cell performances are improved under pressure at 1.3 V. The gas analyses have revealed that the methane formation is only activated under polarization and pressure. These experimental results have been used to validate a model which encompasses a chemical and electrochemical description of the co-electrolyser combined with a mass transport module. It has been found that the model is able to predict accurately the polarization curves as well as the syngas compositions at the cell outlet. Once validated, the model has been used to analyze the operating mechanisms in pressurized co-electrolysis. The impact of pressure on the mass transfer, the electrochemical and chemical reactions has been discussed. The close interaction between the electrochemical and chemical reactions for the internal production of CH4 has been specifically highlighted. Finally, operating maps have been computed at 10 bar from 700 °C to 800 °C. These simulations have shown that formation of CH4 in the co-electrolyser remains limited at 700 °C.
- Published
- 2017
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