| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Study on Microwave Regeneration Conditions, Structure and Properties of Waste Impregnated Activated Carbon |
| WANG Kunjun1,*, HU Bo2,*, LI Shijun1, CHANG Sen1, ZHANG Zhiquan1, QIU Dangui1,*
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1 Department of Environmental Engineering and Technology, China Institute for Radiation Protection, Taiyuan 030006, China
2 Irradiation Technology Center, China Institute for Radiation Protection, Taiyuan 030006, China |
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Abstract 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 1 000 mg/g, respectively. Besides, more than 97% of the strength could be maintained after regeneration. In particular, the activity of CCl4 also increased significantly from 26.32% 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.
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Published: 10 September 2022
Online: 2022-09-10
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| Fund:China National Nuclear Corporation Science Fund For Talented Young Scholars(CNNC-2021YTEP-028) and Applied Basic Research Program of Shanxi Province (201701D221095). |
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2022, Vol. 36 
