Hydrogen production by steam-oxidative reforming of bio-ethanol assisted by Laval nozzle arc discharge

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• 作者：Changming Du ; ^{glidarc@163.com} ; Hongxia Li ; Lu Zhang ; Jing Wang ; Dongwei Huang ; Mudan Xiao ; Jiawen Cai ; Yabin Chen ; Hanlu Yan ; Ya Xiong ; Yi Xiong
• 关键词：Laval nozzle ; Bio-ethanol ; Non-thermal plasma ; Steam reforming ; Hydrogen production
• 刊名：International Journal of Hydrogen Energy
• 出版年：2012
• 期刊代码：42_03603199
• 类别：ch
• 出版时间：May, 2012
• 卷：37
• 期：10
• 页码：8318-8329
• 文件大小：1174 K

摘要

The hydrogen production from an easily transported liquid feedstock can be an efficient alternative for fuel cells application. The steam-oxidative reforming of bio-ethanol by a novel gliding arc discharge named Laval nozzle arc discharge (LNAD) was investigated in this paper at low temperature and atmospheric pressure. The conversion efficiency and product distributions, mainly of H₂ and CO, were studied as functions of O/C ratio, S/C ratio, the ethanol flow rate and input power. The voltage-ampere (V-I) characteristic is also discussed here concerning the non-thermal plasma effect on the bio-ethanol reforming. A high conversion rate and fair H₂ yield have been achieved, 90%and 40%respectively. When the ethanol flow rate (G_ethanol) was 0.15聽g聽s^鈭? and S/C聽=聽2.0, the minimum specific energy requirement of H₂ and CO were achieved at O/C聽=聽1.4 with the specific energy input of 55.44聽kJ per ethanol mole, 72.92聽kJ聽mol^鈭? and 80.20聽kJ聽mol^鈭? respectively. The optimal conditions for ethanol reforming seem to be S/C聽=聽2.0 and O/C聽=聽1.4-1.6, which are higher than those of the reaction's stoichiometry. This paper shows interesting results in comparison with the ethanol reforming assisted by other discharges. Compared with others, it features good conversion rate, low energy consumption and significantly reduced nitrogen oxide emission.