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Vol.11 No.1previous AASP19(150-151-152-153-154-155)-AA156 NT93
Academic Articles
Regular Paper Vol.11 No.1 (2019) p.40 - p.45
 

Research on hydrogen safety technology utilizing the automotive catalyst

 

Hitomi Ono1, Keisuke Takenaka1, Tomoaki Kita1, Masashi Taniguchi2, Daiju Matsumura3, Yasuo Nishihata3, Ryutaro Hino4, Ernst-Arndt Reinecke5, Kazuyuki Takase6, Hirohisa Tanaka1,*
 
1 Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo 669-1337, Japan
2 Daihatsu Motor Co., Ltd., 3000 Yamanoue, Ryuo, Gamo, Shiga 590-2593, Japan
3 Japan Atomic Energy Agency, SPring-8, 1-1-1 Koto, Sayo, Hyogo 679-5148, Japan
4 Japan Atomic Energy Agency, 4002, Narita, Oarai, Higashi-Ibaraki, Ibaraki 311-1393, Japan
5 Forschungszentrum Jülich (Jülich, Germany) IEK-6, Jülich, 52425, Germany
6 Nagaoka University of Technology, 1603-1, Kamitomiokamachi, Nagaoka, Niigata 940-2188, Japan
 
Abstract
Safety management technology of hydrogen gas is extremely important not only for nuclear power generation but also for future society. This is international research and development on hydrogen safety technology in which industry, government and academia collaborate. A brand-new passive autocatalytic recombiner (PAR) system utilizing the monolithic “intelligent catalyst” has been studied for the long-term storage of high-concentration radioactive materials related to the decommissioning of nuclear reactors. In a small lab scale test, it was found that this monolithic catalyst can start a hydrogen oxidation reaction from a low temperature of minus 20 ℃. The monolith-type automotive catalyst showed high hydrogen conversion activity from a room temperature in a large-scale reactor of REKO-4 in Jülich (FZJ). It became clear that natural convection by reaction is greatly improved by roughening the cell density of the monolith catalyst especially under static environmental conditions such as in a storage container. Furthermore, this natural convection is strengthened by adopting a chimney, and the hydrogen oxidation reaction per unit time has improved about three times. Taking advantage of this superior catalytic property, we aim to complete the safety technology for storage containers at an early stage and advance the development of highly active catalyst from further low temperature.
 
Keywords
hydrogen safety, nuclear power plant, catalyst, recombiner, monolith
 
Full Paper: PDF EJAM Vol. 11 No. 1 pp.40-45 "Research on hydrogen safety technology utilizing the automotive catalyst"
Article Information
Article history:
Received 30 November 2018
Accepted 15 May 2019