Decomposition of NaBH4 with self-regeneration of carbon-supported CoCl2 catalyst

ÇAKANYILDIRIM Ç., GÜRÜ M.

INTERNATIONAL JOURNAL OF GREEN ENERGY, vol.14, no.12, pp.1005-1010, 2017 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 14 Issue: 12
  • Publication Date: 2017
  • Doi Number: 10.1080/15435075.2017.1354297
  • Journal Name: INTERNATIONAL JOURNAL OF GREEN ENERGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1005-1010
  • Keywords: Catalyst, CoCl2, hydrogen energy, hydrolysis, NaBH4, regeneration, SODIUM-BOROHYDRIDE SOLUTION, HYDROGEN GENERATION, HYDROLYSIS REACTION, OPERATION, KINETICS
  • Gazi University Affiliated: Yes

Abstract

In this study, economically favorable CoCl2 catalysts at four different amounts were supported on activated carbon (AC) for NaBH4 dehydrogenation. Supported catalyst could achieve hydrogen release for 2,060 cycles, which is equivalent to 103days of uninterrupted operation. Slow and continuous hydrogen release was observed in all experiments. Even 1g of NaBH4 can carry 1.2L of hydrogen, and in hydrolysis process, it liberates 2.5L of hydrogen that indicates the decomposition of water. EDX analysis and reverse burette measurements show that CoCl2 could be homogeneously distributed on and permanently joined to the support surface. Kinetic investigation of the dehydrogenation reaction fits zero order kinetics, and activation energy was calculated to be 48kJ/mol.