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

Energies

Silvia Román Suero³  Beatriz Ledesma Cano³  Andrés Álvarez-Murillo³  Awf Al-Kassir²  Talal Yusaf¹ 

[1] National Centre for Engineering in Agriculture, University of Southern Queensland, Brisbane, QLD 4350, Australia;Department of Mechanical, Energy and Materials Engineering, University of Extremadura, Avda. Elvas s/n, Badajoz 06006, Spain;Department of Applied Physics, University of Extremadura, Avda. Elvas s/n, Badajoz 06006, Spain;

关键词: glycerin;    steam gasification;    synthesis gas;    hydrogen;   

DOI  :  10.3390/en81112339

来源: mdpi

【 摘 要 】

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 (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.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.