Regeneration of activated carbon from waste mercury catalyst

被引：0
|
作者：
Wang S.-C. [1 ]
Yang Q. [2 ]
Zhang M.-G. [2 ]
Song J.-F. [1 ]
Li H.-L. [2 ]
Guo X.-Y. [1 ]
机构：
[1] School of Metallurgy and Environment, Central South University, Changsha
[2] School of Energy Science and Engineering, Central South University, Changsha
来源：
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2021年 / 31卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Activated carbon; Chemical regeneration; Mercury; Thermal regeneration; Waste mercury catalyst;
D O I：
10.11817/j.ysxb.1004.0609.2021-37670
中图分类号：
学科分类号：
摘要：
After the recovery of mercury by heat treatment of waste mercury catalyst, a large amount of waste with activated carbon as the main component was formed. The new method combined hydrochloric acid chemical regeneration with thermal regeneration processes. The regeneration performances under different regeneration conditions were compared, the effects of hydrochloric acid concentration, impregnation time, thermal regeneration temperature and thermal regeneration time were analyzed. The characteristics of the regenerated activated carbon samples were analyzed, the adsorption indexes were tested and the mercury removal experiment was carried out in fixed bed. The results show that the mercury adsorption capacity of the regenerated activated carbon significantly is improved after the combination treatment of chemical regeneration and thermal regeneration. The optimal regeneration conditions are as follows: acid concentration of 0.6 mol/L, chemical regeneration time of 0.5 h, thermal regeneration temperature of 750℃ and thermal regeneration time of 2 h. After regeneration, the highest iodine adsorption value is 1022.12 mg/g activated carbon, methylene blue adsorption value is 182.34 mg/g activated carbon, and after continuous adsorption by fixed bed for 3 h, the mercury adsorption efficiency of regenerated activated carbon is above 80%. To realize the high value utilization of waste activated carbon from waste mercury catalyst after mercury recovery, a low cost, simple and efficient method to regenerate activated carbon from waste mercury catalyst is provided in this work. © 2021, Science Press. All right reserved.
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页码：715 / 723
页数：8
相关论文
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