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.
Chemosphere. 2013 Oct;93(7):1372-8. doi: 10.1016/j.chemosphere.2013.07.091. Epub 2013 Sep 10.
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.
采用 KrBr(*）闪光灯提供的紫外线辐射，通过具有最大 207nm 波长发射的正弦电子控制装置，对气相二甲胺光解进行了研究。测量了灯的电功率和辐射功率，以确定它们对降解的影响。还考察了流速和二甲胺初始浓度的影响。为了全面评估光解过程，研究了几个参数，包括去除效率、能量产率、碳平衡和 CO₂选择性。结果表明，去除效率随输入功率的提高和气流速率的降低而增加。当灯功率为 102W，流速为 15 m(3) h(-1)时，去除效率高达 68%。二甲胺初始浓度最佳约为 3520mg m(-3)，当输入功率为 65W 时，能量产率高达 442gk Wh(-1)。此外，通过 GC-MS 鉴定了两种链状化合物（1,3-双二甲氨基-2-丙醇；3-戊烯-2-酮，4-氨基）和三种环状有机物（1-氮杂环丁烷甲醛，2,2,4,4-四甲基；N-甲基-邻甲苯琥珀酰胺酸；对乙酰乙酰替苯胺）作为次级产物，以证明二甲胺降解的途径。
