活性炭负载碳酸锰协同紫外光降解甲苯的研究  

Study on Synergistic Degradation of Toluene Catalyzed by Manganese Carbonate on Activated Carbon under Ultraviolet Light

作　　者：袁昊[1] 杨康 周铜 彭贺 YUAN Hao;YANG Kang;ZHOU Tong;PENG He(School of Resources and Environmental Engineering,Shanghai Polytechnic University,Shanghai 201209,China)

机构地区：[1]上海第二工业大学资源与环境工程学院,上海201209

出　　处：《上海第二工业大学学报》2022年第2期105-111,共7页Journal of Shanghai Polytechnic University

摘　　要：近年来,在低浓度挥发性有机物(volatile organic compounds,VOCs)废气治理工艺中,紫外光(UV)在处理低浓度VOCs中展现出节能、反应条件温和与无危废污染等优点,是一种十分符合“双碳”减排目标的工艺。然而,UV降解VOCs时所带来的臭氧(O_(2))问题引起人们的高度重视。通过CFD软件对废气光反应器进行废气的流场与紫外灯光场模拟,优化光反应器的设计并最大化UV的利用效率。通过研究UV降解联合催化氧化降解VOCs,探索了MnCO_(3)/AC/UV、MnCO_(3)/UV、TiO_(2)/UV和UV 4种不同工艺降解VOCs的效果。研究结果表明,当Mn CO_(3)与AC掺杂质量比为0.75:1,甲苯初始浓度为0.04μg/kg,废体流量为3.2 L/min时,4种工艺中MnCO_(3)/AC/UV对甲苯降解效果最好,效率可达96%。在UV与MnCO_(3)/AC催化剂协同作用下,不仅可以大幅提升甲苯降解效率,还能有效利用UV副产物O_(2),实现VOCs的高效降解。In recent years,in the treatment process of low concentration volatile organic compounds(VOCs)waste gas,ultraviolet light(UV)shows the advantages of energy saving,mild reaction conditions and no hazardous waste pollution in the treatment of low concentration VOCs.It is a process very in line with the double carbon emission reduction target.However,the ozone(O_(2))problem caused by the degradation of VOCs by UV has attracted great attention.The exhaust gas flow field and UV field of the experimental model were simulated by CFD software to optimize the design of photo-reaction and maximize the utilization efficiency of UV light.By studying the degradation of VOCs by UV degradation combined with catalytic oxidation,the effects of four different processes of MnCO_(3)/AC/UV,MnCO_(3)/UV,TiO_(2)/UV and UV on the degradation of VOCs were explored.The results show that when the mass ratio of MnCO_(3)to AC is 0.75:1,the initial concentration of toluene is 0.04μg/kg and the waste flow rate is 3.2 L/min,the degradation effect of MnCO_(3)/AC/UV to toluene is the best among the four processes,and the efficiency can reach 96%.Under the synergistic action of UV light and MnCO_(3)/AC catalyst,not only the degradation efficiency of toluene can be greatly improved,but also the UV by-product O_(2)can be effectively used to realize the efficient degradation of VOCs.

关 键 词：紫外光降解 碳酸锰 活性炭 挥发性有机物 甲苯 

分 类 号：TQ426[化学工程]