Numerical study on a two-stage Metal Hydride Hydrogen Compression system

Evangelos I. Gkanas, D. M. Grant, A. D. Stuart, C. N. Eastwick, D. Book, S. Nayebossadri, L. Pickering, G. S. Walker

Research output: Contribution to journalConference articlepeer-review

22 Citations (Scopus)
30 Downloads (Pure)


A multistage Metal Hydride Hydrogen Compression (MHHC) system uses a combination of hydride materials in order to increase the total compression ratio, whilst maximizing the hydrogenation rate from the supply pressure at each stage. By solving the coupled heat, mass and momentum conservation equations simultaneously the performance of a MHHC system can be predicted. In the current work a numerical model is proposed to describe the operation of a complete compression cycle. Four different MHHC systems are examined in terms of maximum compression ratio, cycle time and energy consumption and it was found that the maximum compression ratio achieved was 22:1 when operating LaNi5 (AB5-type) and a Zr–V–Mn–Nb (AB2-type intermetallic) as the first and second stage alloys respectively in the temperature range of 20 °C (hydrogenation) to 130 °C (dehydrogenation).
Original languageEnglish
Pages (from-to)S18-S22
JournalJournal of Alloys and Compounds
Issue number1
Early online date8 Apr 2015
Publication statusPublished - 5 Oct 2015
Event14th International Symposium on Metal-Hydrogen Systems: Fundamentals and Applications - Manchester, United Kingdom
Duration: 20 Jul 201425 Jul 2014

Bibliographical note

NOTICE: this is the author’s version of a work that was accepted for publication in Journal of Alloys and Compounds. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Alloys and Compounds, [VOL 645, ISSUE 1, (2015)] DOI: 10.1016/j.jallcom.2015.03.123

© 2015, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International


  • Metal Hydride Hydrogen Compression
  • Metal hydride
  • Simulation
  • Coupled heat and mass transfer
  • Hydrogenation/dehydrogenation


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