title: Photo-dissociation of dimethylamine by KrBr* excilamp.
abstract: A study of dimethylamine photo-dissociation in the gas phase has been conducted using UV radiation delivered from a KrBr(*) excilamp, driven by a sinusoidal electronic control gear with maximum emission at wavelength of 207 nm. The electrical input power and radiant power of the lamp were measured to determine their effects on the degradation. The influence of flow velocity and initial concentration of dimethylamine were also examined. In order to evaluate the photo-dissociation process comprehensively, several parameters were investigated, including removal efficiency, energy yield, carbon balance and CO₂ selectivity. It is shown that the removal efficiency increases with enhanced input power and decreased gas flow rate. A high removal efficiency of 68% is achieved for lamp power 102W and flow velocity 15 m(3) h(-1). The optimum dimethylamine initial concentration is around 3520 mg m(-3), for which the energy yield reaches up to 442 gk Wh(-1) when the input power is 65W. In addition, two chain compounds (1,3-bis-dimethylamino-2-propanol; 3-penten-2-one, 4-amino) and three ring organic matters (1-azetidinecarboxaldehyde, 2,2,4,4-tetramethyl; N-m-tolyl-succinamic acid; p-acetoacetanisidide), were identified by GC-MS as secondary products, in order to demonstrate the pathways of the dimethylamine degradation.
authors.affiliation: Department of Materials Science, Fudan University, 220 Handan Road, Shanghai 200433, People's Republic of China; Engineering Research Center of Advanced Lighting Technology, Ministry of Education, Fudan University, 220 Handan Road, Shanghai 200433, People's Republic of China; Institute for Electric Light Sources, Fudan University, 220 Handan Road, Shanghai 200433, People's Republic of China.
authors.forename: Qiuyi
authors.initials: Q
authors.lastname: Han
authors.forename: Zhaolian
authors.initials: Z
authors.lastname: Ye
authors.forename: Jie
authors.initials: J
authors.lastname: Zhao
authors.forename: Graeme
authors.initials: G
authors.lastname: Lister
authors.forename: Shanduan
authors.initials: S
authors.lastname: Zhang
mesh_terms: D004123:Dimethylamines / Q000032:analysis* / Q000737:chemistry; D055668:Photochemical Processes; D014466:Ultraviolet Rays; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis* / Q000737:chemistry; D018508:Water Purification / Q000379:methods*
chemical_list: D004123:Dimethylamines; D014874:Water Pollutants, Chemical; C034516:dimethylamine
keywords: Dimethylamine; Energy yield; KrBr(*) excilamp; Photo-dissociation; Removal efficiency