Capturing low-pressure hydrogen using V–Ti–Cr catalyzed magnesium hydride

Chengshang Zhou, Zhigang Zak Fang, Pei Sun, Lei Xu, Yong Liu

Research output: Contribution to journalArticle

Abstract

Catalyzed magnesium hydride is suggested as a potential absorbent material for hydrogen separation, purification, and other relevant applications. The present study reports an investigation on selective hydrogen absorption using ball-milled VTiCr-catalyzed MgH2 from a gaseous mixture. Temperature oscillation absorption method, thermogravimetric analysis and differential scanning calorimeter techniques are utilized to characterize the VTiCr-catalyzed MgH2, demonstrating a reversible capacity up to 4 wt%H when the temperature is oscillated between 150 and 350 °C. When the hydrogen partial pressure is increased from 0.04 to 0.4 bar the reaction (dehydrogenation and hydrogenation) temperatures increase, and so do the reversible hydrogen capacities. The reaction kinetics are stable during the first 10 cycles. Transmission electron microscopy analysis shows that the VTiCr catalyst is a few nanometers in size and is dispersed uniformly in MgH2 matrix. The results of this study demonstrate that nano-VTiCr catalyzed MgH2 can readily react with low-pressure hydrogen and cycle in the mixture atmosphere.

LanguageEnglish (US)
Pages139-147
Number of pages9
JournalJournal of Power Sources
Volume413
DOIs
StatePublished - Feb 15 2019

Fingerprint

Hydrides
Magnesium
hydrides
magnesium
Hydrogen
low pressure
catalysts
Catalysts
hydrogen
cycles
absorbents
Dehydrogenation
dehydrogenation
Calorimeters
purification
Reaction kinetics
Partial pressure
Temperature
Hydrogenation
hydrogenation

Keywords

  • Catalyst
  • Hydrogen cycling
  • Hydrogen selective absorption
  • Magnesium hydride
  • TGA/DSC

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

Cite this

Capturing low-pressure hydrogen using V–Ti–Cr catalyzed magnesium hydride. / Zhou, Chengshang; Fang, Zhigang Zak; Sun, Pei; Xu, Lei; Liu, Yong.

In: Journal of Power Sources, Vol. 413, 15.02.2019, p. 139-147.

Research output: Contribution to journalArticle

Zhou, Chengshang ; Fang, Zhigang Zak ; Sun, Pei ; Xu, Lei ; Liu, Yong. / Capturing low-pressure hydrogen using V–Ti–Cr catalyzed magnesium hydride. In: Journal of Power Sources. 2019 ; Vol. 413. pp. 139-147.
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