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Sustainable additives for the production of hydrogen via sodium borohydride hydrolysis

Abstract: Finding stable solutions for hydrogen storage is one of the main challenges to boosting its deployment as an energy vector and contributing to the decarbonization of the energy sector. In this context, sodium borohydride (NaBH4) has been largely studied as a hydrogen storage material due to its significant advantages, such as low pressure, stability, and high hydrogen storage density. The development of catalysts and additive materials for the on-demand hydrolysis of NaBH4 for hydrogen release is a key research area. This work studies the effects of non-toxic and environmentally friendly additives for the hydrolysis process in terms of yield, lag time, hydrogen generation rate, and gravimetric density. Specifically, four additives, including sodium carboxymethylcellulose (CMC), polyacrylamide (PAM), sodium dodecyl sulfate (SDS), and B-cyclodextrin (BCD), were studied for their application in the storage and release of hydrogen. The best results were provided by the use of sodium carboxymethyl cellulose and polyacrylamide. In the first case, a hydrolysis yield of 85%, a lag time of 70 s, a hydrogen production rate of 1374 mL·min-1·gcat-1, and a storage capacity of 1.8 wt% were obtained. Using polyacrylamide as additive, a hydrolysis yield of almost 100% was achieved, although it required a significantly higher time period for complete conversion.

Otras publicaciones de la misma revista o congreso con autores/as de la Universidad de Cantabria

 Autoría: Gómez-Coma L., Silva D.L., Ortiz A., Rangel C.M., Ortiz-Martínez V.M., Pinto A.M.F.R., Ortiz I.,

 Fuente: Applied Sciences, 2023, 13(12), 6995

Editorial: MDPI

 Fecha de publicación: 09/06/2023

Nº de páginas: 11

Tipo de publicación: Artículo de Revista

 DOI: 10.3390/app13126995

ISSN: 2076-3417

Proyecto español: PID2021-123120OB-I00

Proyecto europeo: info:eu-repo/grantAgreement/EC/ATLANTIC AREA/ EAPA_204%2F2016/Atlantic network for renewable generation and supply of hydrogen to promote high energy efficiency/HYLANTIC