title: Decomposition of dimethylamine gas with dielectric barrier discharge.
abstract: The decomposition of dimethylamine (DMA) with gas under high flow rate was investigated with dielectric barrier discharge (DBD) technology. Different parameters including removal efficiency, energy yield, carbon balance and CO2 selectivity, secondary products, as well as pathways and mechanisms of DMA degradation were studied. The experimental results showed that removal efficiency of DMA depended on applied voltage and gas flow rate, but had no obvious correlation with initial concentration. Excellent energy performance was obtained using present DBD technology for DMA abatement. When experiment conditions were controlled at: gas flow rate of 14.9 m(3)/h, initial concentration of 2104 mg/m(3), applied voltage of 4.8 kV, removal efficiency of DMA and energy yield can reach 85.2% and 953.9 g/kWh, respectively. However, carbon balance (around 40%) was not ideal due to shorter residence time (about 0.1s), implying that some additional conditions should be considered to improve the total oxidation of DMA. Moreover, secondary products in outlet gas stream were detected via gas chromatogram-mass spectrum and the amounts of NO3(-) and NO2(-) were analyzed by ion chromatogram. The obtained data demonstrated that NOx might be suppressed due to reductive NH radical form DMA dissociation. The likely reaction pathways and mechanisms for the removal of DMA were suggested based on products analysis. Experimental results demonstrated the application potential of DBD as a clean technology for organic nitrogen-containing gas elimination from gas streams.
authors.affiliation: College of Chemistry and Environmental Engineering, Jiangsu University of Technology, Changzhou, 213001, PR China. bess_ye@jstu.edu.cn
authors.forename: Zhaolian
authors.initials: Z
authors.lastname: Ye
authors.forename: Jie
authors.initials: J
authors.lastname: Zhao
authors.forename: Hong ying
authors.initials: Hy
authors.lastname: Huang
authors.forename: Fei
authors.initials: F
authors.lastname: Ma
authors.forename: Renxi
authors.initials: R
authors.lastname: Zhang
mesh_terms: D000393:Air Pollutants / Q000737:chemistry; D002244:Carbon / Q000737:chemistry; D002845:Chromatography; D004123:Dimethylamines / Q000032:analysis* / Q000737:chemistry*; D004867:Equipment Design; D008401:Gas Chromatography-Mass Spectrometry; D005740:Gases / Q000032:analysis*; D017665:Hydroxyl Radical; D007220:Industrial Waste; D009584:Nitrogen / Q000737:chemistry; D009812:Odorants; D010100:Oxygen / Q000737:chemistry
chemical_list: D000393:Air Pollutants; D004123:Dimethylamines; D005740:Gases; D007220:Industrial Waste; D017665:Hydroxyl Radical; D002244:Carbon; C034516:dimethylamine; D009584:Nitrogen; D010100:Oxygen
keywords: DBD; Dimethylamine; Energy yield; Secondary products