Low-cost method for sodium borohydride regeneration and the energy efficiency of its hydrolysis and regeneration process

标题

Low-cost method for sodium borohydride regeneration and the energy efficiency of its hydrolysis and regeneration process

作者

作者:Ouyang, LZ (Ouyang, L. Z.)^[1,2,3 ]; Zhong, H (Zhong, H.)^[1,2 ]; Li, ZM (Li, Z. M.)^[1,2 ]; Cao, ZJ (Cao, Z. J.)^[1,2 ]; Wang, H (Wang, H.)^[1,2 ]; Liu, JW (Liu, J. W.)^[1,2 ]; Zhu, XK (Zhu, X. K.)^[1,2 ]; Zhu, M (Zhu, M.)^[1,2 ]

期刊信息

摘要

Hydrolysis of sodium borohydride (NaBH4) is one of the most attractive methods for energy generation of mobile systems used as hydrogen source because of the high gravimetric density and controllable hydrogen generation of NaBH4. However, regeneration of NaBH4 is a key issue that remains to be solved, and the energy efficiency of NaBH4 is unknown. In the present study, the energy efficiency of NaBH4 hydrolysis and the entire process of sodium metaborate (NaBO2) regeneration via reaction with magnesium hydride (MgH2) is determined through thermodynamics calculations. The maximum energy efficiency is 49.91%, indicating that NaBH4 generation by reaction between MgH2 and NaBO2 during ball milling is feasible. An inexpensive high-energy ball milling method is employed to regenerate NaBH4 by reaction of NaBO2 with magnesium lanthanum hydrides (H-Mg3La). Products after ball milling are characterized through Fourier transform infrared spectroscopy and X-ray diffraction measurements. In the reaction of NaBO2 with H-Mg3La, MgH2 reacts with NaBO2 and then lanthanum hydride (LaH3) reacts with NaBO2 to produce NaBH4. (C) 2014 Elsevier B.V. All rights reserved.

关键词

作者关键词:Sodium borohydride; Energy efficiency; Magnesium-lanthanum hydrides; Ball milling

作者信息

作者信息

通讯作者地址:Zhu, M (通讯作者)

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

电子邮件地址:memzhu@scut.edu.cn

出版商

ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS

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