吸附在多相催化臭氧氧化降解有机物中的作用

采用连续流扣半连续流的运行方式，通过考察在催化剂表面的吸附能力有差异的两种有机污染物——硝基苯与水合三氯乙醛的催化臭氧氧化降解效能，对多相催化臭氧氧化工艺中催化剂的吸附作用进行了讨论。试验结果表明，在多相催化臭氧氧化系统中，对有机物的催化臭氧氧化效能并非是臭氧氧化和催化剂吸附作用的简单叠加，有机物吸附到催化剂表面后会继续被催化氧化分解。催化剂对有机污染物的吸附作用并不是其发挥高效催化能力的必要条件。臭氧在催化剂表面的吸附、分解是催化臭氧氧化系统发挥其效能的关键，所生成活性物质的氧化能力决定了体系对有机物降解效率的高低。

Role of Adsorption in Heterogeneous Catalytic Ozonation Process for Degradation of Organics in Water

Choosing nitrobenzene and chloral hydrate as model compound, the role of adsorption in the heterogeneous catalytic ozonation process was discussed by continuous or semi-continuous flow test. h is found that in heterogeneous catalytic ozonation process, the organics are further decomposed by catalytic oxidation after being adsorbed on the catalyst. By comparing the degradation efficiencies of nitrobenzene and chloral hydrate, which have the different adsorption abilities on catalyst, it is presumed that the adsorption of organics on catalyst is not prerequisite, while the adsorption and decomposition of ozone on catalyst are the key steps.