Abstract
Hydrogen absorption and desorption isotherms have been measured for several metal hydride alloys identified as possible candidates in the high-pressure (i.e. 80 MPa) stage of a two-stage hydrogen compressor. The isotherms were obtained using two independent Sieverts volumetric test systems built specifically for measuring hydrogen absorption and desorption parameters from 0.10 to 100 MPa. The results obtained enabled us to identify the alloy Ti0.8Zr0.2Fe1.6V0.4 as the most viable of the candidates investigated for use in the high-pressure stage of a prototype two-stage 80+ MPa compressor, as it produced the highest desorption pressures at moderate temperatures. Issues and challenges in determining reliable isotherms at pressures 50 MPa are also described.
Original language | English |
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Article number | 034004 |
Journal | JPhys Energy |
Volume | 3 |
Issue number | 3 |
DOIs | |
State | Published - Jul 2021 |
Funding
This research was supported by the United States Department of Energy (DOE) Office of Energy Efficiency and Renewable Energy, Fuel Cell Technology Office. ORNL is operated by UT-Battelle LLC for DOE under contract number DE-AC05-00OR22725. The authors wish to acknowledge the valuable contributions and support from Professor Craig Jensen of Hawaii Hydrogen Carriers. The authors appreciate the analyses, discussions, and other contributions by Terry Johnson and Anne Mallow from Sandia National Laboratories to these studies as part of the DOE high-pressure compressor project. The authors also wish to thank Matt Besser (ISU Ames Laboratory) for discussions and preparation of the alloys and Dr Michael Cheshire (formerly of ORNL) for his work on the XRD analyses.
Funders | Funder number |
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U.S. Department of Energy | |
Office of Energy Efficiency and Renewable Energy | |
Hydrogen and Fuel Cell Technologies Office | |
UT-Battelle | DE-AC05-00OR22725 |
Keywords
- high-pressure metal hydrides
- hydrogen storage alloys
- pressure composition isotherms
- thermal hydrogen compression