低温等离子体耦合液相Fe-C催化降解氯苯  

DEGRADATION OF CHLOROBENZENE BY NONTHERMAL PLASMA COUPLED LIQUID PHASE Fe-C CATALYSIS

作　　者：杨全[1] 刘莎 姜超超 刘蓉蓉 张鹏[1] 秦彩虹[1] YANG Quan;LIU Sha;JIANG Chaochao;LIU Rongrong;ZHANG Peng;QIN Caihong(School of Environmental and Municipal Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;China Qiyuan Engineering Design Institute Co.,Ltd.,Xi’an 710000,China)

机构地区：[1]西安建筑科技大学环境与市政工程学院,西安710055 [2]中国启源工程设计研究院有限公司,西安710000

出　　处：《环境工程》2024年第1期85-94,共10页Environmental Engineering

基　　金：中国陕西省自然科学基础研究计划(2021JQ-508)。

摘　　要：单一低温等离子体技术(NTP)和单一湿式非均相催化技术降解VOCs时分别面临O3排放和需要氧化剂连续供应的问题。为解决单一技术瓶颈,将NTP与湿式非均相催化技术相结合降解氯苯(CB),将NTP副产物O3作为湿式系统的氧化剂来源,从而达到深度矿化CB的目的。活性炭(AC)作为非均相催化剂的载体,表面负载不同金属组分后投加到湿式反应器中。结果表明,与单一NTP相比,NTP耦合液相非均相系统能够显著改善CB的降解。当Fe作为活性组分,Fe-C催化剂投加量为1 g/L,溶液初始pH为7,供电电压为14 kV时,耦合系统得到了最佳CB降解性能,CB去除率和矿化率分别达到了81.4%和48%。Fe-C投加使得液相CB吸收传质系数从0.0280 s^(-1)增加到0.1207 s^(-1),使得催化过程的传质增强因子达到了9.81。最后,根据各系统中间有机体推测出了CB降解途径。Single non-thermal plasma technology(NTP)and single wet heterogeneous catalytic technology for the degradation of VOCs suffer from the problems of O3 emission and the need for continuous oxidant supply,respectively.To overcome the single technology bottleneck,this study combines NTP with wet heterogeneous catalytic technology for the degradation of chlorobenzene(CB),using NTP by-product O3 as the oxidant source for the wet system to achieve deep mineralization of CB.Activated carbon(AC)was used as the support for the heterogeneous catalyst,and a surface loaded with different metal fractions was injected into the wet reactor.Experimental results showed that the NTP-coupled liquid-phase heterogeneous system significantly improved the degradation of chlorobenzene(CB),compared to a single NTP.The best CB degradation performance was obtained for the coupled system when Fe was used as the active component,the Fe-C catalyst was injected at a dosage of 1 g/L,the initial pH of the solution was 7,and the supply voltage was 14 kV,and the CB removal efficiency and mineralization rate reached 81.4%and 48%,respectively.Fe-C injection increased the CB absorption mass transfer coefficient in the liquid phase from 0.0280 s^(-1) to 0.1207 s^(-1),resulting in a mass transfer enhancement factor of 9.81 for the catalytic process.Finally,the CB degradation pathway was deduced from the intermediates of each system.

关 键 词：低温等离子体 液相非均相催化 氯苯 臭氧 

分 类 号：X701[环境科学与工程—环境工程]