MnO_(x)/PG催化剂脱除气态Hg^(0)及其再生性能  

Study of MnO_(x)/PG catalyst for Hg^(0) removal and regeneration

作　　者：王钧伟 魏坤 陆克平[2] 石李明 徐灿 秦伟 张建利[3] WANG Junwei;WEI Kun;LU Keping;SHI Liming;XU Can;QIN Wei;ZHANG Jianli(College of Chemistry and Chemical Engineering,Anhui Key Laboratory of Functional Coordination Compounds,Anqing Normal University,Anqing,246011,China;Anqing Petrochemical Company,SINOPEC,Anqing,246002,China;State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering,Ningxia University,Yinchuan,750021,China)

机构地区：[1]安庆师范大学化学化工学院,光电磁功能材料安徽省重点实验室,安庆246011 [2]中国石油化工股份有限公司安庆分公司,安庆246002 [3]省部共建煤炭高效利用与绿色化工国家重点实验室(宁夏大学),银川750021

出　　处：《环境化学》2022年第8期2516-2523,共8页Environmental Chemistry

基　　金：国家自然科学基金(21203003,51404014);安徽省自然科学基金(1708085MB49);安徽省高校学科(专业)拔尖人才学术资助项目(gxbjZD2021062);省部共建煤炭高效利用与绿色化工国家重点实验室开放课题(2020-KF-28)资助。

摘　　要：本文研究了MnO_(x)/PG催化剂脱除模拟烟气中Hg^(0)的性能及脱除Hg^(0)后MnO_(x)/PG催化剂的再生.考察了Hg^(0)浓度、空速等操作条件及再生方法对MnO_(x)/PG催化剂脱除Hg^(0)的影响.结果表明,MnO_(x)/PG催化剂具有良好的脱除Hg^(0)的能力和稳定性,在反应温度为210℃、空速为6000 h^(-1)、Hg^(0)浓度为80μg·m^(-3)的条件下400 min时的Hg^(0)脱除效率保持在95%以上,50 h时仍能保持在80%左右.热再生后的MnO_(x)/PG催化剂仍具有良好的脱除Hg^(0)能力,最佳再生温度为400℃,水洗再生对MnO_(x)/PG催化剂的再生效果不明显.热再生后的MnO_(x)/PG催化剂经空气预氧化处理有利于提高其对Hg^(0)的再次脱除能力.Gas phase Hg^(0) removal by MnO_(x)/PG catalyst was studied as well as the regeneration of the used MnO_(x)/PG catalyst after Hg^(0) removal in this paper.The effects of Hg^(0) concentration,space velocity and regeneration method on Hg^(0) removal over MnO_(x)/PG were investigated.The results showed that MnO_(x)/PG catalyst had high and stable Hg^(0) removal capability.Hg^(0) removal efficiency was above 95%at 210℃with the space velocity of 6000 h^(-1)and Hg^(0) concentration of 80μg·m^(-3)for 400 mins,and could maintained about 80%for 50 h.MnO_(x)/PG catalyst still had high Hg^(0) removal capability after thermal regeneration and the optimal regeneration temperature was 400℃,while the effect of water-washing regeneration was not obvious.The pre-oxidation treatment of MnO_(x)/PG catalyst after thermal regeneration was beneficial to improve the Hg^(0) removal capability of MnO_(x)/PG.

关 键 词：MnO_(x)/PG 汞 再生 烟气 

分 类 号：X701[环境科学与工程—环境工程]