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( Saud Shirjana ),( Bhattarai Roshan Mangal ),목영선 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.1
Non-thermal plasma (NTP) is a clean, efficient and eco-friendly pollution control technique. NTP coupled with catalysis is a promising technology for dwindling of dilute volatile organic compounds(VOCs) which is widely used due to its operation under low temperature and atmospheric pressure. Ethylene is one of VOCs produced by agricultural commodities that cause the ripening of fruits and vegetables which when controlled can lead to extend the postharvest shelf life of them. The adsorption of dilute ethylene was performed in mesh-type corona discharge-coupled catalytic reactor(CDCCR) with monolithic catalyst serving as both adsorbent and catalyst. The cyclic adsorption/ plasma-catalytic oxidation has been widely used for treatment of air contaminated by dilute ethylene. Air containing dilute ethylene (30ppm) was enriched on monolithic catalyst surface during adsorption process followed by application of plasma to recover the adsorption capability of the surface.
( Saud Shirjana ),( Bhattarai Roshan Mangal ),( Nguyen Van Toan ),목영선 한국공업화학회 2020 한국공업화학회 연구논문 초록집 Vol.2020 No.-
Removal of Volatile Organic Compounds (VOCs) has been successfully done with plasma-catalytic reactors such as packed-bed dielectric barrier discharge reactor. Due to the high-pressure drop and low treating volume of gas in these reactors, the practical application involves large operation and maintenance costs. A commercial honeycomb monolith reactor can treat large volumes of gas along with homogeneous discharge through the honeycomb cells. The commercial honeycomb is at least 50mm of height and it has been one of the hurdles to generating homogeneous plasma for commercialization purposes. For ethylene treatment, relative humidity has a huge effect on the generation of plasma as well as the adsorption of ethylene over catalysts. Our work focuses on the generation of atmospheric pressure plasma in the commercial monolith in a relatively high humid environment and to utilize it for the effective removal of ethylene.
( Saud Shirjana ),( Bhattarai Roshan Mangal ),목영선 한국공업화학회 2019 한국공업화학회 연구논문 초록집 Vol.2019 No.0
Volatile Organic Compounds (VOCs) can be harmful for the environment and human health. Among the many VOCs, ethylene is one of them that is produced by agricultural commodities that cause the ripening of fruits and vegetables. Controlling the ethylene activity can lead to extend the postharvest shelf life of fruits and vegetables. The adsorption of dilute ethylene was performed in corona discharge-coupled catalytic reactor(CDCCR) with palladium-coated zeolite pellets serving as both adsorbent and catalyst. The removal of ethylene in this system was carried out by cyclic operation consisting repetitive steps: 1) adsorption followed by 2) plasma-catalytic oxidation. Ethylene was removed from air stream with concentration of 20ppm and enriched on zeolite surface during adsorption process for 60 min followed by application of plasma to recover the adsorption capability of the surface.