title: Removal of ethylene from air stream by adsorption and plasma-catalytic oxidation using silver-based bimetallic catalysts supported on zeolite.
abstract: Dynamic adsorption of ethylene on 13X zeolite-supported Ag and Ag-M(x)O(y) (M: Co, Cu, Mn, and Fe), and plasma-catalytic oxidation of the adsorbed ethylene were investigated. The experimental results showed that the incorporation of Ag into zeolite afforded a marked enhancement in the adsorptivity for ethylene. The addition of transition metal oxides was found to have a positive influence on the ethylene adsorption, except Fe(x)O(y). The presence of the additional metal oxides, however, appeared to somewhat interrupt the diffusion of ozone into the zeolite micro-pores, leading to a decrease in the plasma-catalytic oxidation efficiency of the ethylene adsorbed there. Among the second additional metal oxides, Fe(x)O(y) was able to reduce the emission of ozone during the plasma-catalytic oxidation stage while keeping a high effectiveness for the oxidative removal of the adsorbed ethylene. The periodical treatment consisting of adsorption followed by plasma-catalytic oxidation may be a promising energy-efficient ethylene abatement method.
authors.affiliation: Department of Chemical and Biological Engineering, Jeju National University, Jeju 690-756, South Korea.
authors.forename: Quang Hung
authors.initials: QH
authors.lastname: Trinh
authors.affiliation: Department of Chemical and Biological Engineering, Jeju National University, Jeju 690-756, South Korea.
authors.forename: Sang Baek
authors.initials: SB
authors.lastname: Lee
authors.affiliation: Department of Chemical and Biological Engineering, Jeju National University, Jeju 690-756, South Korea. Electronic address: smokie@jejunu.ac.kr.
authors.forename: Young Sun
authors.initials: YS
authors.lastname: Mok
mesh_terms: D000327:Adsorption; D000393:Air Pollutants / Q000737:chemistry*; D000397:Air Pollution / Q000517:prevention & control; D002384:Catalysis; D005030:Ethylenes / Q000737:chemistry*; D019216:Metals, Heavy / Q000737:chemistry*; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry*; D010126:Ozone / Q000737:chemistry; D018030:Silver Compounds / Q000737:chemistry*; D017641:Zeolites / Q000737:chemistry*
chemical_list: D000393:Air Pollutants; D005030:Ethylenes; D019216:Metals, Heavy; D010087:Oxides; D018030:Silver Compounds; D017641:Zeolites; D010126:Ozone; C036216:ethylene
keywords: Catalyst; Ethylene; Metal oxides; Plasma; Silver; Zeolite