VOCs催化氧化机理与动力学研究进展

Research progress in mechanism and kinetics of VOCs catalytic oxidation

挥发性有机物(VOCs)作为一种有巨大威胁的大气污染物质,如何消除其已成为近年来的研究热点。催化氧化技术由于可高效降解VOCs而倍受关注,但该技术的应用受限于催化剂低温活性不高、催化氧化反应机理研究不足及反应过程模型分析原理差异较大等问题。综述了不同种类催化剂催化氧化VOCs反应机理及动力学研究进展,从热力学分析角度探讨了催化氧化反应条件的优化,对多种催化氧化VOCs过程的吸附动力学模型进行了归纳和比较。最后,对VOCs催化氧化技术的发展趋势进行了展望,为催化氧化VOCs催化剂的设计及反应条件的控制提供了理论参考。

Volatile organic compounds(VOCs), as an air pollutant with great threat, how to eliminate it has become a research hotspot in the field of atmosphere in recent years. Catalytic oxidation technology is considered to be an efficient choice for the treatment of VOCs because it can degrade VOCs efficiently. However, its application is limited by the poor low temperature activity of catalyst,insufficient research on catalytic oxidation reaction mechanism, large differences in reaction process model analysis principles and so on. The research progress of reaction mechanism and kinetics of VOCs catalytic oxidation process with different kinds of catalysts was reviewed, the optimization of reaction conditions of catalytic oxidation was discussed from the perspective of thermodynamic analysis, and the adsorption kinetic models of various VOCs catalytic oxidation processes were summarized and compared. Finally,the development trend of VOCs catalytic oxidation technology in the future was prospected. This review provides a theoretical reference for the design of VOCs catalytic oxidation catalysts and the control of reaction conditions.