Authors: Örücü, Enis; Karakaya, Mustafa; Avc, Ahmet K; Önsan, Z lsen

Source: Journal of Chemical Technology & Biotechnology, Volume 80, Number 10, October 2005 , pp. 1103-1110(8)

Publisher: John Wiley & Sons, Ltd.

Abstract:

Ethanol conversion to hydrogen has been investigated by a series of thermodynamic analyses and computer simulations within the context of a cost-effective fuel processor/fuel cell system where heat exchange is of great importance. Two different methods, multi-reaction equilibria and Gibbs free energy minimisation, are used for the thermodynamic analyses. The computer simulations consider the catalytic conversion of ethanol to hydrogen on a bimetallic Pt–Ni catalyst by indirect partial oxidation (IPOX) which consists of total oxidation (TOX), steam reforming (SR) and water–gas shift (WGS) reactions. The results indicate that there is an optimal water:fuel ratio for maximum hydrogen production at each operating condition for hydrogen yields calculated as a percentage of the theoretical value. Mass-based hydrogen yields are also presented considering fuel economy especially for vehicular applications. Finally, the benefits of using a secondary WGS reactor and the comparison of the results of the two thermodynamic methods are highlighted. Copyright © 2005 Society of Chemical Industry

Keywords: ethanol; indirect partial oxidation; fuel cells; computer simulations; hydrogen production

Document Type: Research article

DOI: http://dx.doi.org/10.1002/jctb.1288

Affiliations: 1: Department of Chemical Engineering, Bogaziçi University, Bebek 34342, Istanbul, Turkeyaziçi University, Bebek 34342, Istanbul, Turkey">

Publication date: 2005-10-01

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