Materials Transactions Online

Materials Transactions, Vol.59 No.05 (2018) pp.855-857
© 2018 The Japan Institute of Metals and Materials

Hydrogen Desorption Isobar Properties of Ti1.1CrMn at High Temperatures and Pressures

Nobuhito Tsurui1, 2, Kiyotaka Goshome3, Satoshi Hino1, Naruki Endo3, Tetsuhiko Maeda3, Hiroki Miyaoka2 and Takayuki Ichikawa2, 4, 5

1Kobe Material Testing Laboratory, Co., Ltd., Kako-gun, Hyogo 675-0155, Japan
2Graduate School of Integrated Arts and Sciences, Hiroshima University, Higashi-Hiroshima 739-8521, Japan
3Renewable Energy Research Center, National Institute of Advanced Industrial Science and Technology, Koriyama 963-0298, Japan
4Natural Science Center for Basic Research and Development, Hiroshima University, Higashi-Hiroshima 739-8530, Japan
5Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan

In this study, we developed a thermochemical technique to compress hydrogen gas up to more than 80 MPa. The results showed that Ti1.1CrMn alloys can generate a hydrogen pressure of 82 MPa upon being heated to ∼200°C. In order to evaluate the hydrogen absorption and desorption properties of the Ti1.1CrMn alloy at elevated temperatures, its pressure-composition (PC) isotherms were measured at 100, 140, and 180°C. To examine the durability of the alloy, hydrogen compression cycle tests were performed at pressures ranging from 14 to 80 MPa by heating the alloy from 35 to 200°C. In order to determine the temperature required for achieving the dissociation pressure of 82 MPa, we generated an isobar plot based on the PC isothermal measurements.

[doi:10.2320/matertrans.M2018012]

(Received 2018/01/10; Accepted 2018/02/19; Published 2018/04/25)

Keywords: hydrogen storage alloy, thermochemical compressor, titanium-chromium-manganese alloy, pressure composition isotherm, isobar measurement

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