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Open AccessArticle

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