Destruction of Volatile Organic Compounds in Air by a Superimposed Barrier Discharge Plasma Reactor and Activated Carbon Filter Hybrid System
Destruction of Volatile Organic Compounds in Air by a Superimposed Barrier Discharge Plasma Reactor and Activated Carbon Filter Hybrid System
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通过叠加阻挡放电等离子体反应器和活性炭过滤器混合系统破坏空气中的挥发性有机化合物
DOI：
10.1515/jaots-2002-0202
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发表时间：
2002
影响因子：
--
通讯作者：
J. Chang
中科院分区：
文献类型：
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作者：
K. Urashima;T. Misaka;T. Ito;J. Chang
摘要采用叠层阻挡放电-活性炭过滤复合系统去除空气中的甲苯和三氯乙烯。叠加阻挡放电由无声放电和表面放电组成。在60 Hz交流施加电压条件下，对1 - 10 L/min的气体流速、0 - 7 W的施加功率以及0 - 2，000 ppm的甲苯和TCE初始浓度进行实验。通过FTIR、GC和TLV-VOC检测器测量放电副产物。结果表明：甲苯的降解效率随外加功率的增加而单调增加，等离子体反应器对甲苯的去除率约为90%，复合系统对甲苯的去除率可达98%，复合系统对TCE的去除率有一定的提高，单独放电反应器对TCE的去除率可达50%; 4）反应器和活性炭过滤器的压降随气体流量的增加而增加，5）TCE分解生成CO2、H2O和Cl 2，除CO2和H2O外，这些排放副产物均被活性炭过滤器吸收; 6）在放电副产物中没有观察到COCl 2、HCl、CO、NOx和O3;以及7）甲苯分解的能量产率高达26 g/kWh，TCE分解的能量产率高达15 g/kWh。
Abstract Superimposed barrier discharge and activated carbon filter hybrid systems were used to remove toluene and TCE from air streams. The superimposed barrier-discharge consisted of silent and surface discharges. Experiments were conducted for the gas flow rates from 1 to 10 L/min, applied power from 0 to 7 W and toluene and TCE initial concentrations from 0 to 2,000 ppm for 60 Hz ac applied voltage conditions. Discharge by-products were measured by FTIR, GC, and TLV-VOC detectors. The results show that 1) the toluene-decomposition efficiency monotonically increases with increasing applied power; 2) approximately 90% of the toluene is removed by the plasma reactors and up to 98% is removed by the hybrid system; 3) TCE removal is enhanced by the hybrid system and up to 50% is removed by a discharge reactor alone; 4) the pressure drop of the reactor and carbon filter increase with increasing gas flow rate; 5) TCE is decomposed to form CO2, H2O and Cl2 and, except for the CO2 and H2O, these discharge by-products are absorbed in the activated carbon filters; 6) no COCl2 , HCl, CO, NOx and O3 are observed in the discharge by-products; and 7) the energy yield for toluene decomposition is as high as 26 g/kWh, and as high as 15 g/kWh for TCE decomposition.