Process Safety and Environmental Protection ( IF 7.8 ) Pub Date : 2021-07-06 , DOI: 10.1016/j.psep.2021.07.009 Ji Hun Bang 1 , Christian Ariane Santos 1 , Young Min Jo 1
Volatile organic compounds (VOCs) generated in urban workplaces have been considered as significant air pollutants both indoors and outdoors. In order to reduce those harmful VOCs from urban emission sources, a non-thermal plasma reactor equipped with dielectric barrier discharge (DBD) using alternating current (AC) was investigated with a focus on process design including recirculation. Decomposition efficiency of low concentration VOCs was evaluated in terms of energy yield and conversion selectivity. At 20 ppm, the highest decomposition efficiency (97.3 %) was achieved in the treatment of n-hexane, followed by toluene at 96.6 %, MEK at 91.5 % and acetaldehyde at 90.4 %. A recirculation rate (QR) of 50 % improved the system efficiency, particularly for acetaldehyde (49.47 %–63.86 %) and toluene (79.05 %–95.89 %). It also increased the complete energy yield and the selectivity for carbon monoxide (CO) and carbon dioxide (CO2). By-product ozone concentration decreased significantly with increasing recirculation rate at the same input energy level.
中文翻译:
使用串联介质阻挡放电反应器节能处理室内挥发性有机化合物
城市工作场所产生的挥发性有机化合物 (VOC) 被认为是室内和室外的重要空气污染物。为了减少来自城市排放源的有害 VOC,研究了配备使用交流电 (AC) 的介质阻挡放电 (DBD) 的非热等离子体反应器,重点是包括再循环在内的工艺设计。从能量产率和转化选择性方面评估低浓度 VOC 的分解效率。在 20 ppm 时,在正己烷处理中实现了最高分解效率 (97.3 %),其次是甲苯 96.6 %、MEK 91.5 % 和乙醛 90.4 %。再循环率 (Q R) 50 % 提高了系统效率,特别是对于乙醛 (49.47 %–63.86 %) 和甲苯 (79.05 %–95.89 %)。它还增加了完整的能量产率和一氧化碳 (CO) 和二氧化碳 (CO 2 )的选择性。在相同输入能量水平下,副产品臭氧浓度随着再循环率的增加而显着降低。