MnFe/海泡石后置协同低温等离子体降解甲苯的研究  

Degradation of Toluene by Non-Thermal Plasma Combined with Post MnFe/Sepiolite Catalysts

作　　者：刘建奇[1,2] 刘鑫[1] 陈佳尧 钟方川[3,4] LIU Jianqi;LIU Xin;CHEN Jiayao;ZHONG Fangchuan(College of Environmental Science and Engineering,Donghua University,Shanghai 201620,China;Institute of Heating,Ventilation and Air Conditioning(IHVAC),Donghua University,Shanghai 201620,China;College of Science,Donghua University,Shanghai 201620,China;Member of Magnetic Confinement Fusion Research Centre(Donghua University),Ministry of Education,Shanghai 201620,China)

机构地区：[1]东华大学环境科学与工程学院,上海201620 [2]东华大学暖通空调研究所,上海201620 [3]东华大学理学院,上海201620 [4]教育部磁约束核聚变研究中心(东华大学),上海201620

出　　处：《安全与环境工程》2022年第3期161-167,共7页Safety and Environmental Engineering

基　　金：国家重点研发计划项目(2018YFC0705300);中央高校基本科研业务费专项资金资助项目(2232017D-25)。

摘　　要：低温等离子体(NTP)净化法是去除挥发性有机物(VOCs)的常用方法之一。利用NTP协同催化剂处理VOCs时可降低能耗,减少副产物,提升CO_(2)选择性和VOCs的去除效率。以盐酸改性海泡石(SEP)纤维为载体,利用浸渍法制备了不同Mn、Fe负载量的MnFe/SEP催化剂,采用BET、SEM、TEM、XRD、XPS等方法对催化剂进行了微观结构表征和组分分析,并利用介质阻挡放电等离子体结合后置的MnFe/SEP催化剂,开展了等离子体协同催化剂催化降解甲苯的试验研究。结果表明:海泡石纤维是性能优良的催化剂载体,可以很好地分散MnO_(2)和Fe_(2)O_(3)等活性组分,并保持较高的比表面积;锰铁氧化物可以提升甲苯去除率、碳平衡、CO_(2)选择性,减少O_(3)残留浓度;当负载的Mn含量为6 wt%时,锰铁氧化物高度分散在海泡石纤维表面,催化活性高,性价比较高。Non-Thermal Plasma(NTP)purification is one of the common methods to remove volatile organic compounds(VOCs).Treating VOCs with NTP synergistic catalyst can reduce energy consumption and by-products,and improve CO_(2)selectivity and VOCs removal efficiency.This paper prepares xMnFe/sepiolite(SEP)catalysts with different Mn loading by impregnation method with hydrochloric acid modified SEP fiber as the carrier,and characterizes the microstructure and composition of the catalyst by BET,SEM,TEM,XRD and XPS.Then the paper conducts synergistic degradation experimental study of toluene by dielectric barrier discharge plasma combined with post xMnFe/SEP catalysts.The results show that the SEP fiber presents excellent performance as the catalyst carrier,which MnO_(2),Fe_(2)O_(3)and other active components are well dispersed on the surface of SEP with high specific area.The ozone concentration is significantly reduced and the toluene removal rate,carbon balance and CO_(2)selectivity are obviously improved by xMnFe/SEP catalyst.When the content of supported Mn is 6wt%,ferromanganese oxide is highly disper-sed on the surface of SEP fiber,which leads to high catalytic activity and high cost performance.

关 键 词：低温等离子体(NTP) 介质阻挡放电 催化剂 甲苯 海泡石纤维 

分 类 号：X701.7[环境科学与工程—环境工程]