Kinetics of boron hydrolysis for hydrogen production

Bara Wahbeh, Samuel Tell, Tareq Abu Hamed, Roni Kasher

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


This study examines the kinetics of boron hydrolysis. The boron hydrolysis reaction is classified as a noncatalytic heterogeneous reaction. It was found the steam rapidly hydrolyzes the boron, forming an oxide ash layer that then also reacts with the steam, forms gaseous boric acid, and re-exposes the boron substrate to steam. Additionally, the thickness of the ash layer, once formed, was found to be relatively constant through the reaction. In order to facilitate kinetic analysis the reaction was divided into two stages: a fast oxidation stage and a second, slower stage. The corresponding kinetic parameter for the first stage activation energy is 25 kJ/mol. The shrinking core model was used to model the second stage of the hydrolysis reaction where it was found that diffusion of steam through the ash layer was the rate limiting step.

Original languageEnglish
Pages (from-to)6210-6214
Number of pages5
JournalInternational Journal of Hydrogen Energy
Issue number14
StatePublished - 10 May 2013


  • Boron hydrolysis
  • Hydrogen
  • Kinetics
  • Shrinking core Model
  • Thermochemical cycle

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology


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