Hydrogen generation by hydrolysis of MgH2 and enhanced kinetics performance of ammonium chloride introducing

标题

Hydrogen generation by hydrolysis of MgH2 and enhanced kinetics performance of ammonium chloride introducing

作者

作者:Huang, MH (Huang, Minghong)^[1,2 ]; Ouyang, LZ (Ouyang, Liuzhang)^[1,2,3 ]; Wang, H (Wang, Hui)^[1,2 ]; Liu, JW (Liu, Jiangwen)^[1,2 ]; Zhu, M (Zhu, Min)^[1,2 ]

期刊信息

摘要

Apparent activation energies of MgH2 hydrolysis in deionized water were deduced for the first time being 58.06 kJ/mol. This paper also reports the mechanisms of MgH2 hydrolysis and the effects of NH4Cl on the kinetics of magnesium hydride hydrolysis. Experimental results show that hydrogen generation via MgH2 hydrolysis exhibited the highest rates in 4.50 wt% NH4Cl solution. This is because addition of NH4Cl could effectively decrease the compactness of magnesium hydroxide. It is also found that addition of NH4Cl could effectively enhance the hydrolysis kinetics and lead to a reduction of the apparent activation energy of MgH2 hydrolysis. The apparent activation energies of MgH2 hydrolysis decreased from 58.06 kJ/mol in deionized water to 50.86 and 30.37 kJ/mol in 0.5 and 4.5 wt% NH4Cl solutions, respectively. MgH2-4.5 wt% NH4Cl system showed the fastest hydrolysis rate, producing 1310 mL e hydrogen in 5 min, 1604 mL g(-1) hydrogen in 10 min, and 1660 mL e hydrogen in 30 min at 60 degrees C. The results reveal that NH4Cl may be a promising reagent for promoting the hydrolysis of MgH2 for hydrogen generation systems, which demonstrated a new method to improve the hydrolysis of MgH2. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

关键词

作者关键词:Hydrogen generation; Ammonium chloride; Magnesium hydride; Hydrolysis

作者信息

作者信息

通讯作者地址:Ouyang, LZ (通讯作者)

S China Univ Technol, Sch Mat Sci & Engn, Key Lab Adv Energy Storage Mat Guangdong Prov, Guangzhou 510641, Guangdong, Peoples R China.   增强组织信息的名称     South China University of Technology

地址:

	[ 1 ] S China Univ Technol, Sch Mat Sci & Engn, Key Lab Adv Energy Storage Mat Guangdong Prov, Guangzhou 510641, Guangdong, Peoples R China   增强组织信息的名称     South China University of Technology
	[ 2 ] S China Univ Technol, China Australia Joint Lab Energy & Environm Mat, Guangzhou 510641, Guangdong, Peoples R China   增强组织信息的名称     South China University of Technology
	[ 3 ] S China Univ Technol, Key Lab Fuel Cell Technol Guangdong Prov, Guangzhou 510641, Guangdong, Peoples R China   增强组织信息的名称     South China University of Technology

电子邮件地址:meouyang@scut.edu.cn

出版商

PERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND

类别分类