Photocatalytic Reactor Systems for Advanced Oxidation/ Reduction Processes

用于高级氧化/还原过程的光催化反应器系统

• 批准号: 9619885
• 负责人: Michael Hoffmann
• 金额: $ 46.09万
• 依托单位: California Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-04-15 至 2000-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9619885&HistoricalAwards=false
• 关键词: Photocatalytic; Reactor; Systems; Advanced; Oxidation

9619885 Hoffmann This is an award to provide support for research on use of titanium dioxide as a catalyst in a photocatalytic process for treatment of aqueous and gaseous waste streams to reduce their pollutional impact on the receiving environment. The goal of this project is to determine whether the rate of the photochemical reaction can be significantly increased in aqueous heterogeneous media to levels comparable to those obtained in application of the photocatalytic process to gas-phase waste streams. The research is designed to address the fundamental basis for this apparent discrepancy by studying the reaction mechanism using a pulsed source of ultraviolet radiation. Two hypotheses are planned to be examined. One is that the difference in reactivities between the process application to liquids and gases relates to differences in the mode of substrate adsorption on the surface of the aatalyst. The other is that water may inhibit oxygen reduction and/or substrate competition for available adsorption sites on the target compound. Results of this project are expected to contribute to a better understanding than now exists of photochemical reactions as they may be applied to decontamination of soil and water. This in turn is likely to result in improvement of the engineering design of processes that can be used reduce the pollutional effect of liquid and gaseous waste discharges on the quality of surface and groundwater and to decontaminate soil.***

9619885 Hoffmann该奖项旨在支持在光催化过程中使用二氧化钛作为催化剂来处理水和气体废物流以减少其对接收环境的污染影响的研究。 该项目的目标是确定是否可以显着增加的光化学反应的速率在水性非均相介质中的水平相媲美的应用中获得的光催化过程中的气相废物流。 该研究旨在通过使用紫外辐射脉冲源研究反应机制来解决这种明显差异的根本基础。 计划对两个假设进行审查。 一个是，该方法应用于液体和气体之间的反应性的差异与催化剂表面上的底物吸附模式的差异有关。 另一个是水可以抑制氧还原和/或底物对目标化合物上可用吸附位点的竞争。 该项目的结果预计将有助于更好地了解比现在存在的光化学反应，因为它们可能被应用于土壤和水的净化。 这反过来又可能导致改进工艺的工程设计，从而减少液体和气体废物排放对地表水和地下水质量的污染影响，并净化土壤。