标题
作者
作者:Zhong, H (Zhong, H.)[1,2 ]; Wang, H (Wang, H.)[1,2,5 ]; Liu, JW (Liu, J. W.)[1,2,5 ]; Sun, DL (Sun, D. L.)[3 ]; Fang, F (Fang, F.)[3 ]; Zhang, QA (Zhang, Q. A.)[4 ]; Ouyang, LZ (Ouyang, L. Z.)[1,2,5 ]; Zhu, M (Zhu, M.)[1,2,5 ]
期刊信息
卷:
页:
DOI:
出版年:
文献类型:Article
摘要
MgH2 hydrolysis is an efficient and convenient method for hydrogen generation. By introducing rare earth hydrides, the hydrolysis properties of hydrogenated Mg3La hydrides (HeMg3La) and hydrogenated La2Mg17 hydrides (HeLa2Mg17) are enhanced compared with MgH2 hydrolysis, but the energy efficiency of the three hydrolysis cycles is unknown and a relatively cheap MgH2-based hydride synthesis method still needs to be developed. We design and calculate for the first time the energy efficiency of such three hydrolysis cycles based on thermodynamics. Maximum energy efficiencies of 45.3%, 40.1% and 41.1% are obtained, which indicates that hydrogen generation from the three methods is feasible and energy favorable. A convenient method for La2Mg17 hydrogenation is achieved by ball milling La2Mg17 and Ni under 7 MPa hydrogen pressure at 25 degrees C. The ball-milled products, MgH2 + LaH3 + Ni hydrides composite, show excellent hydrolysis performance, and produce 1208 ml/g hydrogen in 40 min at 25 degrees C, with a reduced activation energy of 52.9 kJ/mol. These benefits result from the particle size refinement from ball milling and catalysis of LaH3 and Ni. (C) 2016 Elsevier B.V. All rights reserved.
关键词
作者关键词:Energy efficiency; Hydrolysis; Ball milling; Magnesium-lanthanum hydrides
作者信息
通讯作者地址:Wang, H; Ouyang, LZ (通讯作者)
 | S China Univ Technol, Sch Mat Sci & Engn, Guangzhou 510641, Guangdong, Peoples R China. |
| S China Univ Technol, Key Lab Adv Energy Storage Mat Guangdong Prov, Guangzhou 510641, Guangdong, Peoples R China. |
地址:
出版商
类别分类
研究方向:Chemistry; Materials Science; Metallurgy & Metallurgical Engineering
Web of Science 类别:Chemistry, Physical; Materials Science, Multidisciplinary; Metallurgy & Metallurgical Engineering