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

Energies

Andrés Álvarez-Murillo¹  Silvia Román Suero¹  Beatriz Ledesma¹  Awf Al-Kassir²  Talal Yusaf³ 

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

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

DOI  :  10.3390/en81112339

来源: DOAJ

【 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】

Unknown