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Energies 2015, 8(11), 12765-12775; doi:10.3390/en81112339

Glycerin, a Biodiesel By-Product with Potentiality to Produce Hydrogen by Steam Gasification

1
Department of Applied Physics, University of Extremadura, Avda. Elvas s/n, Badajoz 06006, Spain
2
Department of Mechanical, Energy and Materials Engineering, University of Extremadura, Avda. Elvas s/n, Badajoz 06006, Spain
3
National Centre for Engineering in Agriculture, University of Southern Queensland, Brisbane, QLD 4350, Australia
*
Author to whom correspondence should be addressed.
Academic Editor: Chang Sik Lee
Received: 3 September 2015 / Revised: 30 October 2015 / Accepted: 4 November 2015 / Published: 11 November 2015
(This article belongs to the Special Issue Energy for Agriculture)
View Full-Text   |   Download PDF [983 KB, uploaded 11 November 2015]   |  

Abstract

This work investigates the possibility of providing a use to one of the major byproducts generated during biodiesel processing: glycerin. In particular, the steam gasification of water/glycerin mixtures is studied, analysing the influence of temperature (range 600–900 °C), inlet flow rate (0.5–3 mL·min1) and water/glycerin ratio (6–12 wt/wt, %) on the gas composition (H2, CO, CH4 and CO2), higher heating value, and generated power. In general, a more diluted water/glycerin mixture is more interesting in order to provide a higher fraction of hydrogen in the gas produced, although it also involves a decrease in the power obtained. Higher temperatures cause a greater contribution of water gas and water gas shift reactions in all cases, thus increasing the H2 proportion of the gas. Finally, a greater inlet flow rate increases gas production, but decreases the hydrogen proportion. View Full-Text
Keywords: glycerin; steam gasification; synthesis gas; hydrogen glycerin; steam gasification; synthesis gas; hydrogen
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Suero, S.R.; Ledesma, B.; Álvarez-Murillo, A.; Al-Kassir, A.; Yusaf, T. Glycerin, a Biodiesel By-Product with Potentiality to Produce Hydrogen by Steam Gasification. Energies 2015, 8, 12765-12775.

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