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

Silvia Román Suero, Beatriz Ledesma, Andrés Álvarez-Murillo, Awf Al-Kassir and Talal Yusaf
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Silvia Román Suero: Department of Applied Physics, University of Extremadura, Avda. Elvas s/n, Badajoz 06006, Spain
Beatriz Ledesma: Department of Applied Physics, University of Extremadura, Avda. Elvas s/n, Badajoz 06006, Spain
Andrés Álvarez-Murillo: Department of Applied Physics, University of Extremadura, Avda. Elvas s/n, Badajoz 06006, Spain
Awf Al-Kassir: Department of Mechanical, Energy and Materials Engineering, University of Extremadura, Avda. Elvas s/n, Badajoz 06006, Spain
Talal Yusaf: National Centre for Engineering in Agriculture, University of Southern Queensland, Brisbane, QLD 4350, Australia

Energies, 2015, vol. 8, issue 11, 1-11

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·min ? 1 ) and water/glycerin ratio (6–12 wt/wt, %) on the gas composition (H 2 , CO, CH 4 and CO 2 ), 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 H 2 proportion of the gas. Finally, a greater inlet flow rate increases gas production, but decreases the hydrogen proportion.

Keywords: glycerin; steam gasification; synthesis gas; hydrogen (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2015
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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