Analysis and experiment on dynamic prediction in magnesium hydride hydrolysis as hydrogen generator

Chung Hsing Chao, Tien Chien Jen, Yen Hsi Ho

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Citations (Scopus)

Abstract

In this paper, analysis and experimental verification for dynamic modeling of an acid-catalyzed magnesium hydride hydrolysis was used to predict the hydrogen generation yield, rate, and gravimetric hydrogen storage capacity. The result shows that the ratio citric acid to magnesium hydride, the geometric forms of MgH2, and the water handling are crucial to this reaction, while the higher temperatures tend to have faster rates of reactions. Furthermore, the zero-order prediction gives a good result only at a relatively low citric acid to magnesium hydride ratio or low hydrolysis reaction rate. The reaction order is approximately one while the citric acid/magnesium hydride molar ratio remains high or the rate of reaction is high. Finally, considering the geometrical effect on the acid-catalyzed MgH2 hydrolysis, the validated Langmuir equation was used to successfully predict the dynamic hydrogen generation fairly well for most hydrolysis reaction rate.

Original languageEnglish
Title of host publicationEnergy
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Print)9780791856284
DOIs
Publication statusPublished - 2013
Externally publishedYes
EventASME 2013 International Mechanical Engineering Congress and Exposition, IMECE 2013 - San Diego, CA, United States
Duration: 15 Nov 201321 Nov 2013

Publication series

NameASME International Mechanical Engineering Congress and Exposition, Proceedings (IMECE)
Volume6 A

Conference

ConferenceASME 2013 International Mechanical Engineering Congress and Exposition, IMECE 2013
Country/TerritoryUnited States
CitySan Diego, CA
Period15/11/1321/11/13

Keywords

  • Hydrogen generation
  • Hydrolysis reaction
  • Kinetics
  • Langmuir equation
  • Magnesium hydride
  • Reaction order

ASJC Scopus subject areas

  • Mechanical Engineering

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