Chem. J. Chinese Universities ›› 2025, Vol. 46 ›› Issue (2): 20240411.doi: 10.7503/cjcu20240411

• Physical Chemistry • Previous Articles     Next Articles

K+ Regulation of MER Zeolite and Its Effect on O2 and N2 Adsorption Kinetics

BAI Xiaowei, TANG Xuan, WANG Yating, ZHANG Feifei, LI Jinping, YANG Jiangfeng()   

  1. College of Chemistry and Chemical Engineering,Taiyuan University of Technology,Taiyuan 030024,China
  • Received:2024-08-30 Online:2025-02-10 Published:2024-10-21
  • Contact: YANG Jiangfeng E-mail:yangjiangfeng@tyut.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(22378287);the Shanxi Youth Science Foundation Project, China(202303021222012)

Abstract:

By varying the amount of mineralizer added during feedstock preparation, the microporous structure of the material was precisely controlled, leading to a differentiation in the adsorption kinetics of O₂ and N₂ within the zeolite pore channels. The experimetal results indicate that as the K/Si molar ratio increases, the pore structure of the material contracts, and porosity gradually decreases. Notably, the O2/N2 kinetic selectivity of K-MER-0.41 [n(K)/n(Si)=0.41] reaches its highest value(3.24) at 298 K. Molecular dynamics simulations further suggest that the diffusion rate of O2 on K-MER-0.41 is also greater than that of N2.

Key words: Zeolite, Adsorption kinetics, O2/N2, Kinetic selectivity, Diffusion rate

CLC Number: 

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