Development of thermal treatment of radioactive waste by uranium oxide catalyst and absorbent for byproducts

氧化铀催化剂及副产物吸收剂热处理放射性废物的研究进展

• 批准号: 20686063
• 负责人: SAWADA Kayo
• 金额: $ 15.89万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (A)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20686063/
• 关键词: 酸化ウラン; 触媒; 吸着剤; 放射性廃棄物; 熱処理法

Catalytic decomposition employing uranium oxide, U_3O_8, powder was carried out for chlorobenzene as one of the toxic gases generated from the thermal treatment of low level radioactive waste. The activation energy of the catalytic decomposition decreased to approximately half of that of the thermal decomposition. Coexistence of nitrogen dioxide with chlorobenzene increased the decomposition rate of chlorobenzene. Addition of calcium hydroxide as an absorbent also increased the conversion. The conversion obtained with the simulated catalyst regenerated with oxalic acid was almost same to that obtained with the mixed powder of uranium oxide and calcium hydroxide at 225℃.

利用铀氧化物U3O8粉末对低放射性废物热处理产生的有毒气体之一氯苯进行催化分解。催化分解的活化能约为热分解活化能的一半。二氧化氮与氯苯共存时，提高了氯苯的分解速率。添加氢氧化钙作为吸收剂也提高了转化率。用草酸再生的模拟催化剂在2 2 5℃时的转化率与用氧化铀和氢氧化钙混合粉末得到的转化率基本相同。

项目成果

Decomposition of NO_2 and VOCs using uranium oxide

利用氧化铀分解NO_2和VOCs

• 发表时间: 2009
• 作者: T. Ikai;K. Sawada;Y. Enokida
• 通讯作者: Y. Enokida

二酸化窒素の酸化ウランを用いた分解

使用氧化铀分解二氧化氮

• 发表时间: 2008
• 作者: 猪飼智治;澤田佳代;榎田洋一
• 通讯作者: 榎田洋一