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.
作者
王钧伟
魏坤
陆克平
石李明
徐灿
秦伟
张建利
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)
出处
《环境化学》
CAS
CSCD
北大核心
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。
