Exergetic study of catalytic steam reforming of bio-ethanol over Pd-Rh/CeO2 with hydrogen purification in a membrane reactor

Abstract : An exergy analysis of the ethanol steam reforming process using a Pd-Rh catalyst supported on ceria in a Pd-Ag membrane reactor has been performed based on experimental data. Both chemical and physical exergy for chemical species together with thermodynamic loss calculations have been considered to evaluate the exergy efficiency of the process. The system has been studied under different operational conditions in terms of temperature (873-923 K), pressure (4-12 bar), and feed flow rate using a water ethanol mixture of 50-50% volume (S/C = 1.6). A significant exergy efficiency dependency on the fuel flow rate and pressure has been encountered when considering the heat loss from the reactor. The best results regarding the exergetic and thermal efficiency have been obtained at high flow rates and 8-12 bar, which has been attributed to the higher hydrogen permeation through the membrane. The chemical reactions involved in the reforming process and the heat losses are the main sources of exergy destruction. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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International Journal of Hydrogen Energy, Elsevier, 2015, 40 (8), pp.3574-3581. 〈10.1016/j.ijhydene.2014.09.016〉
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Soumis le : jeudi 24 septembre 2015 - 15:00:48
Dernière modification le : mardi 16 janvier 2018 - 14:39:42

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Ali Hedayati, Olivier Le Corre, Bruno Lacarrière, Jordi Llorca. Exergetic study of catalytic steam reforming of bio-ethanol over Pd-Rh/CeO2 with hydrogen purification in a membrane reactor. International Journal of Hydrogen Energy, Elsevier, 2015, 40 (8), pp.3574-3581. 〈10.1016/j.ijhydene.2014.09.016〉. 〈hal-01204742〉

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