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Development of precious metal catalyst for tokamak exhaust processing
https://repo.qst.go.jp/records/80915
https://repo.qst.go.jp/records/80915acd25c8c-82e1-48a9-b5c6-26ce5816bd2a
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2020-11-06 | |||||
| タイトル | ||||||
| タイトル | Development of precious metal catalyst for tokamak exhaust processing | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_c94f | |||||
| 資源タイプ | conference object | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Edao, Yuuki
× Edao, Yuuki× Iwai, Yasunori× Edao, Yuuki× Iwai, Yasunori |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | It is necessary to establish the closed deuterium-tritium fuel cycle in the JA DEMO facility for the purpose of fuel recycling. Tokamak exhaust processing system (TEP) is the key system where hydrogen isotopes and other impurity gases are separated, then impurity gases are decomposed into hydrogen isotopes and chemical compositions without hydrogen isotopes in their chemical forms. The main impurity gas to be processed in TEP is a tritiated hydrocarbon. There are some techniques to process tritiated hydrocarbons. Among existing techniques, chemical processing with precious metal catalyst is a practical technique and precious metal catalyst for TEP needs more consideration to improvement. Among tritiated hydrocarbons, tritiated methane is hard to decompose and temperature of catalyst for decomposition of tritiated methane is 500oC or above with a commercial precious metal catalyst. QST is developing precious metal catalyst for TEP to decompose tritiated methane effectively at a lower temperature. We found that the activity of catalyst for decomposition of methane depends on some parameters such as a kind of precious metal, particle size of precious metal on catalyst surface, pore size of catalyst carrier and so on. Our experimental result revealed that methane can be decomposed effectively by selecting the particle size of precious metal and pore size of catalyst carrier suitable for methane decomposition. In addition, the application of hydrophobization technique to a catalyst for TEP improved the efficiency of methane decomposition much more at a lower temperature. | |||||
| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 3rd Asia Pacific Symposium on Tritium Science (APSOT-3) | |||||
| 発表年月日 | ||||||
| 日付 | 2020-11-03 | |||||
| 日付タイプ | Issued | |||||
