1. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430017, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China
Abstract：zeolites have unique nano-confined channels/cages, which are widely used in gas separation, petrochemical industry and environmental protection. The diffusion property is a key factor to determine the separation and production distribution for the zeolite catalysts. Therefore, the investigations of the diffusion properties of guest molecules inside zeolites are of great significance for improving their catalytic reactivity and separation efficiency. However, molecules confined in such zeolite nanopores shows a dramatic difference in diffusion behaviors from those in the condensed state, and there are various factors that determine the diffusion coefficient and according diffusion trajectory of molecules, which brings great challenges to the systematic study of diffusion in the confined space of zeolite. This review focuses on recent research progress related to the diffusion inside zeolite, mainly summarizes the influence mechanisms of zeolite properties (such as topology structure, framework flexibility and active sites) and work conditions (such as concentration and temperature) on the diffusion behavior. Furthermore, the prospect for the further investigations of the diffusion inside zeolites was provided.
YUAN Jiamin1,2,LIU Zhiqiang1 et al. Diffusion Mechanism in Confined Space of Zeolite[J]. Chemical Reaction Engineering and Technology, 2022, 38(2): 175-192.
