Catalyst in-situ regeneration for polychlorinated biphenyl tail gas degradation and catalytic activity recovery mechanisms
简介：To address the problems with catalytic degradation,such as poisoning and inactivation,a simple and efficient gas purging regeneration technique was developed for iron-based catalyst in-situ regeneration.Specifically,the effects of carrier gas types,regeneration temperatures,and granular activated carbon(GAC)addition on iron-based catalyst regeneration were investigated.The Fe3O4/γ-Al2O3 regenerated at 550 ℃ with additional GAC and 15％water vapor exhibited the optimal degradation efficiency towards polychlorinated biphenyls(PCBs),with an increase from 41.2％to 93.5％,compared with non-regenerated Fe3O4/γ-Al2O3.In addition,the 60-hour stability test revealed a well-recovered catalytic activity.During the Fe3O4/γ-Al2O3 regeneration,the coke on the catalyst surface was oxidized and removed in the form of CO2,and meanwhile the oxidized Fe(Ⅲ)was reduced into Fe(Ⅱ)in the catalyst.This study provides a safe and efficient iron-based catalyst regeneration technology for PCB off-gas degradation and reveals the catalytic activity recovery mechanism during catalyst regeneration.展开
学者：ZhichaoYunYUYANGBaiFuXIABingqingWangQiyuanLiuYuYangYonghaiJIANG
关键词：ThermocatalysisGaseous PCBsCoke removalIn-situ regeneration
在线出版日期：2026-03-03 （网站首发日期）
