A comparative study on energetic and exergetic assessment of hydrogen production from bioethanol via steam reforming, partial oxidation and auto-thermal reforming processes

Abstract : Three known types of ethanol reforming processes, ethanol steam reforming (ESR), partial oxidation (PDX) and auto-thermal reforming (ATR), are investigated. Favorable operating conditions are identified for each reaction system to maximize the production of hydrogen from bioethanol. Each process consists of three sections: the main reactor (ESR, PDX or AIR), the CO clean-up section comprised of the water gas shift reactor and preferential CO oxidation reactor and finally, the purification section. The performances of these processes are evaluated through mass, energy and exergy analyses. The material balances show that the total amount of ethanol required to generate 1 mol of hydrogen is 0.23 mol for the ATR, 0.24 mol for the PDX and 0.25 mol for the ESR. The ATR reforming process is shown to have the highest energetic efficiency, i.e., the lowest amount of energy is consumed to produce the same amount of hydrogen from ethanol. Moreover, the AIR process has the best exergetic performance, as it presents the highest ratio of exergy recovered in the hydrogen stream to the total exergy supplied to the system. For all three of the systems, the exergy destruction occurs mainly in the reformer due to the high irreversibility of the reaction.
Type de document :
Article dans une revue
Fuel Processing Technology, Elsevier, 2013, 112, pp.19-27. 〈10.1016/j.fuproc.2013.02.013〉
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https://hal.univ-lorraine.fr/hal-01282092
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Soumis le : jeudi 3 mars 2016 - 11:53:16
Dernière modification le : jeudi 11 janvier 2018 - 06:25:27

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Zouhour Khila, Noureddine Hajjaji, Marie-Noëlle Pons, Viviane Renaudin, Ammar Houas. A comparative study on energetic and exergetic assessment of hydrogen production from bioethanol via steam reforming, partial oxidation and auto-thermal reforming processes. Fuel Processing Technology, Elsevier, 2013, 112, pp.19-27. 〈10.1016/j.fuproc.2013.02.013〉. 〈hal-01282092〉

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