Application of dielectric barrier discharge(DBD) plasma packed with glass and ceramic pellets for SO_2 removal at ambient temperature: optimization and modeling using response surface methodology  

作　　者：Niloofar DAMYAR Ali KHAVANIN Ahmad JONIDI FAFARI Hasan ASILIAN Ramazan MIRZAEI 

机构地区：[1]Department of Occupational Health Engineering,Faculty of Medical Sciences,Tarbiat Modares University,14115-111 Tehran,Iran [2]Department of Environmental Health Engineering,School of Public Health,Iran University of Medical Sciences,14665-354 Tehran,Iran [3]Department of Occupational Health Engineering.School of Public Health,Mashhad University of Medical Sciences,13131-99137 Mashhad,Iran

出　　处：《Plasma Science and Technology》2020年第10期100-110,共11页等离子体科学和技术（英文版）

基　　金：financially supported by the Tarbiat Modares University of Tehran。

摘　　要：Air pollution is a major health problem in developing countries and has adverse effects on human health and the environment. Non-thermal plasma is an effective air pollution treatment technology. In this research, the performance of a dielectric barrier discharge(DBD) plasma reactor packed with glass and ceramic pellets was evaluated in the removal of SO_2 as a major air pollutant from air in ambient temperature. The response surface methodology was used to evaluate the effect of three key parameters(concentration of gas, gas flow rate, and voltage) as well as their simultaneous effects and interactions on the SO2 removal process. Reduced cubic models were derived to predict the SO_2 removal efficiency(RE) and energy yield(EY). Analysis of variance results showed that the packed-bed reactors(PBRs) studied were more energy efficient and had a high SO2 RE which was at least four times more than that of the non-packed reactor. Moreover, the results showed that the performance of ceramic pellets was better than that of glass pellets in PBRs. This may be due to the porous surface of ceramic pellets which allows the formation of microdischarges in the fine cavities of a porous surface when placed in a plasma discharge zone. The maximum SO_2 RE and EY were obtained at 94% and 0.81 g kWh^(-1),respectively under the optimal conditions of a concentration of gas of 750 ppm, a gas flow rate of 2lmin^(-1), and a voltage of 18 kV, which were achieved by the DBD plasma packed with ceramic pellets. Finally, the results of the model's predictions and the experiments showed good agreement.

关 键 词：sulfur dioxide packed-bed plasma glass pellets ceramic pellets response surface methodology(RSM) 

分 类 号：X51[环境科学与工程—环境工程]