Abstract: It was shown by ATR FTIR, XRD and 11B MAS NMR methods that increasing contents of sodium polyborate and sodium carbonate impurities were formed in solid sodium borohydride upon its storage and contact with the air. To increase the NaBH4 purity after storage, it was re-crystallized in diglyme using the well-known Brown's procedure. The purification efficiency was further improved by ammonia treatment during NaBH4 dissolution. It was found that the advantages of using the gaseous ammonia consisted in an increased NaBH4 solubility in diglyme and a more efficient reduction in the content of impurities to form a material consisting of uniform highly dispersed particles of the hydride having a regular cubic shape. It was found for the process of catalytic hydrolysis of NaBH4 that the rate of hydrogen generation and its yield increased with the decreasing content of impurities. These results demonstrate the importance of investigations aimed at improving the existing methods of NaBH4 purification and creating new ones.

Cite: Ozerova A.M. , Komova O.V. , Mukha S.A. , Simagina V.I. , Odegova G.V. , Arzumanov S.S. , Bulavchenko O.A. , Netskina O.V.
An Improved Purification of NaBH4 from Storage-Induced Impurities by Ammonia Assisted Crystallization in Diglyme
International Journal of Hydrogen Energy. 2020. V.45. N55. P.30756-30766. DOI: 10.1016/j.ijhydene.2020.08.071 WOS Scopus РИНЦ AN OpenAlex

Dates:

Submitted:	Jun 15, 2020
Accepted:	Aug 8, 2020
Published online:	Aug 30, 2020
Published print:	Nov 6, 2020

Identifiers:

Web of science:	WOS:000582322100067
Scopus:	2-s2.0-85090061635
Elibrary:	45329812
Chemical Abstracts:	2020:1683597
OpenAlex:	W3081642824

Citing:

DB	Citing
Scopus	14
Web of science	16
Elibrary	12
OpenAlex	15

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