废旧浸渍活性炭的微波再生条件及其结构和性能研究  

Study on Microwave Regeneration Conditions,Structure and Properties ofWaste Impregnated Activated Carbon

作　　者：王坤俊[1] 胡波[2] 李世军[1] 常森 张治权 丘丹圭[1] WANG Kunjun;HU Bo;LI Shijun;CHANG Sen;ZHANG Zhiquan;QIU Dangui(Department of Environmental Engineering and Technology,China Institute for Radiation Protection,Taiyuan 030006,China;Irradiation Technology Center,China Institute for Radiation Protection,Taiyuan 030006,China)

机构地区：[1]中国辐射防护研究院环境工程技术研究所,太原030006 [2]中国辐射防护研究院辐照技术中心,太原030006

出　　处：《材料导报》2022年第17期45-50,共6页Materials Reports

基　　金：中国核工业集团有限公司“青年英才项目”(CNNC-2021YTEP-028);山西省应用基础研究计划项目(201701D221095)。

摘　　要：为了实现废旧碘吸附器更换后产生的浸渍活性炭废物再利用,探索出可行的废浸渍活性炭再生处理技术,以国内某核电站通风系统经连续运行使用失效后的浸渍活性炭为研究对象,本工作开展了废旧浸渍活性炭微波再生方法研究,确定了微波再生的最佳实验条件,并对再生后活性炭的热稳定性、微观结构、吸附性能、关键物理性能等的变化进行了分析。在再生温度600℃、活化时间10 min的最佳再生条件下,能够得到性能良好的再生活性炭,在不进行再次浸渍的情况下,其除碘效率和碘吸附值分别达到97.85%和1000 mg/g。另外,再生活性炭的球盘强度仍保持在97%以上,CCl_(4)活性也明显增加,从再生前的26.32%增加至49.02%。但是,再生温度过高(大于800℃)会导致活性炭表面孔隙结构发生孔熔现象,不利于吸附性能的恢复。In order to realize the reuse of ineffective impregnated activated carbon generated by the waste iodine adsorber,a feasible regeneration technology of the impregnated activated carbon was explored.In this work,microwave regeneration method was utilized to regenerate ineffective impregnated activated carbon from ventilation system of continuous operation in a domestic nuclear power plant and the optimum experimental conditions were determined.The changes of thermal stability,microstructure,adsorption performance and key physical properties of the regenerated activated carbon were also analyzed.The regenerated activated carbon with good performance could be obtained under the optimal regeneration condition of 600℃regeneration temperature and activation for 10 min.Without further impregnation,the iodine removal efficiency and iodine adsorption value of the regenerated activated carbon were 97.85%and 1000 mg/g,respectively.Besides,more than 97%of the strength could be maintained after regeneration.In particular,the activity of CCl_(4) also increased significantly from^(2)6.32%to 49.02%.However,the higher regeneration temperature(>800℃)would lead to the pore fusion on the surface of activated carbon,which was not conducive to the recovery of adsorption performance.

关 键 词：废旧活性炭 微波再生 微观结构 物理性能 除碘效率 

分 类 号：TL941[核科学技术—辐射防护及环境保护]