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Biohydrogen production from Imperata cylindrica bio-oil using non-stoichiometric and thermodynamic model

Oladokun, O. and Ahmad, A. and Abdullah, T. A. T. and Nyakuma, B. B. and Kamaroddin, M. F. A. and Nor, S. H. M. (2017) Biohydrogen production from Imperata cylindrica bio-oil using non-stoichiometric and thermodynamic model. International Journal of Hydrogen Energy, 42 (14). pp. 9011-9023. ISSN 0360-3199

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Abstract

This paper presents a non-stoichiometric and thermodynamic model for steam reforming of Imperata cylindrica bio-oil for biohydrogen production. Thermodynamic analyses of major bio-oil components such as formic acid, propanoic acid, oleic acid, hexadecanoic acid and octanol produced from fast pyrolysis of I. cylindrica was examined. Sensitivity analyses of the operating conditions; temperature (100–1000��C), pressure (1–10�atm) and steam to fuel ratio (1–10) were determined. The results showed an increase in biohydrogen yield with increasing temperature although the effect of pressure was negligible. Furthermore, increase in steam to fuel ratio favoured biohydrogen production. Maximum yield of 60���10% at 500–810��C temperature range and steam to fuel ratio 5–9 was obtained for formic acid, propanoic acid and octanol. The heavier components hexadecanoic and oleic acid maximum hydrogen yield are 40% (740��C and S/F�=�9) and 43% (810��C and S/F�=�8) respectively. However, the effect of pressure on biohydrogen yield at the selected reforming temperatures was negligible. Overall, the results of the study demonstrate that the non-stoichiometry and thermodynamic model can successfully predict biohydrogen yield as well as the composition of gas mixtures from the gasification and steam reforming of bio-oil from biomass resources. This will serve as a useful guide for further experimental works and process development.

Item Type:Article
Uncontrolled Keywords:Bio-oil, Biohydrogen, Pyrolysis, Steam reforming, Thermodynamic
Subjects:T Technology > TP Chemical technology
Divisions:Chemical Engineering
ID Code:77140
Deposited By: Fazli Masari
Deposited On:30 Apr 2018 22:44
Last Modified:30 Apr 2018 22:44

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