含铯亚铁氰化钛钾无机离子交换剂的分解┐催化氧化法处理  

TREATMENT OF POTASSIUM TITANIUM HEXACYANOFERRATE(Ⅱ) INORGANIC ION EXCHANGER USING THERMAL DECOMPOSITION CATALYTIC OXIDATION PROCESS

作　　者：李利宇[1] 宋崇立[1] 鲍卫民[1] 孙永霞[1] 

机构地区：[1]清华大学核能技术设计研究院

出　　处：《辐射防护》1998年第2期104-111,共8页Radiation Protection

摘　　要：含铯量较高的亚铁氰化物的固化问题未能很好解决的主要原因是在高温操作中亚铁氰根会发生分解，放出剧毒的氰气，具有较大的危险性。本研究表明，金属氧化物ＣＧ－１对氰气的氧化分解有较强的催化作用，可以很好地将含氰废气中的氰除去，使之转变为无害的ＣＯ２和Ｎ２。在此基础上，提出了一个分解催化氧化法处理工艺，用以处理高放含铯废液分离流程中产生的含铯亚铁氰化钛钾无机离子交换剂。该工艺首先将含铯交换剂加热分解，然后用催化氧化法来除去释放出的氰（氰去除率在９９．９９％以上）。在除氰的同时也将含铯交换剂转变成各种固体金属氧化物，这有利于后继的含铯交换剂的固化。Ferrocyanide solide had been applied the removal of radioactive cesium from nuclear waste solution.As they would decompose and evolve highly toxic cyanogen gas at high temperature,it is very dangerous to solidify them by high temperature process.In this study it was found that catalyst CG 1 can be used to destroy (CN) 2 to CO 2 and N 2 and a thermal decomposition catalytic oxidation process was proposed for treating the potassium titanium hexacyanoferrate(Ⅱ) inorganic ion exchanger used in HLLW separation process.By the process proposed,the cyanogen evolved in thermal decomposition of the ion exchanger can be thoroughly destroyed (more than 99.99%),and the ferrocyanides are converted to solid oxides compatible with following solidification process. (

关 键 词：氰化物 催化氧化 离子交换剂 高放废液处理 铯 

分 类 号：TL941.01[核科学技术—辐射防护及环境保护]