激光催化氧化甲烷合成化合物的研究进展

Progress in synthesis of compounds by laser catalytic oxidation of methane

天然气储量丰富,日益成为重要的清洁能源之一,而从其主要成分甲烷合成高附加值化合物更是研究前沿。由于甲烷结构稳定,C H键能很高,因而活化甲烷需要的条件非常苛刻。本文首先介绍了普通光催化氧化甲烷合成化合物的反应原理、研究进展、催化反应器和存在不足,然后综述了激光催化氧化甲烷合成化合物的反应原理、研究进展和催化反应器。指出激光光源具有提高光催化剂量子效率和缩短催化反应时间等诸多优势,接下来在深入研究激光催化反应机理的基础上,通过设计科学合理的激光反应体系,并遴选高效的光催化剂,有望显著提升包括甲烷氧化在内的激光催化反应性能,从而具有重要的学术意义和实践价值。今后的重点研究方向是通过激光催化氧化的方法使甲烷在温和的条件下活化,并合成高附加值化合物。

Natural gas is rich in reserves and is increasingly becoming one of the important clean energy,and the synthesis of high value-added compounds from its main component methane is the frontier of research.Because the structure of methane is stable and the energy of C H bond is very high,the conditions for activating methane are very harsh.In this paper,the reaction principle,research progress,catalytic reactors and shortcomings of common photocatalytic oxidation of methane to compounds are introduced,and then the reaction principle,research progress and catalytic reactors of laser catalytic oxidation of methane to compounds are reviewed.Pointed out that laser light source has many advantages,such as improving the quantum efficiency of photocatalyst and shortening the reaction time of photocatalysis.Then on the basis of in-depth study of the mechanism of laser catalytic reaction,it is expected to significantly improve the performance of laser catalytic reaction,including methane oxidation through designing the scientific and reasonable laser reaction system and selecting the efficient photocatalysts,which has important academic significance and practical value.In the future,the key research direction is to activate methane under mild conditions and to synthesize high value-added compounds by laser catalytic oxidation.