Oxidation in Supercritical Water: Reaction Pathways and Kinetics (REU Supplement)

有几种技术用于安全治疗 危险废物。 其中一些包括吸附， 焚烧和生物降解。 含水废物流， 中等有机浓度（1-30%）可能太稀， 经济的焚烧和过于集中的处理 吸附或生物降解。 对于这样的流氧化， 超临界水（SCW）是一种潜在的替代品 技术. 水溶液中存在的危险有机化学品 因此，废物流可以转化为二氧化碳， 水 这项工作的目的是了解动力学的 利用超临界水氧化危险有机废物， 这些过程的设计和开发。 苯酚，萘，氯苯和乙酸将被 在SCW中氧化。 氧化反应将在 流动反应器和产品将分析高 高效液相色谱、气相色谱和气相色谱 色谱质谱法 检查的变化 产物的产率和反应物的转化率， 反应器停留时间将有助于解决 反应途径和反应动力学的测定。 该项目将提供机会， 工程技术的进步， 了解超临界化学反应过程 流体.

Several technologies are in use for the safe treatment of hazardous wastes. Some of these include adsorption, incineration, and biodegradation. Aqueous waste streams with moderate organic concentrations (1-30%) may be too dilute for economical incineration and too concentrated for treatment by adsorption or biodegradation. For such streams oxidation in supercritical water (SCW) is a potential alternative technology. Hazardous organic chemicals present in aqueous waste streams can thus be converted to carbon dioxide and water. This work is aimed at understanding the kinetics of the oxidation of hazardous organic wastes in SCW to be used in the design and development of such processes. Phenol, naphthalene, chlorobenzene and acetic acid will be oxidized in SCW. The oxidation reactions will be conducted in a flow reactor and the products will be analyzed by high performance liquid chromatography, gas chromatography, and gas chromatography mass spectrometry. Examining the variation of the products' yields and the reactant conversion with the reactor residence time will facilitate resolution of the reaction pathways and determination of the reaction kinetics. The project will provide opportunities for practical engineering advances as well as fundamental advances in understanding chemical reaction processes in supercritical fluids.