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Dependence of zeolite topology on alkane diffusion inside diverse channels
Author(s) -
Liu Zhiqiang,
Zhou Jian,
Tang Xiaomin,
Liu Fujian,
Yuan Jiamin,
Li Guangchao,
Huang Ling,
Krishna Rajamani,
Huang Kuan,
Zheng Anmin
Publication year - 2020
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.16269
Subject(s) - diffusion , zeolite , alkane , work (physics) , dimension (graph theory) , chemistry , adsorption , chemical physics , phase (matter) , thermodynamics , gaseous diffusion , molecular diffusion , chemical engineering , materials science , catalysis , organic chemistry , physics , mathematics , metric (unit) , operations management , electrode , pure mathematics , engineering , economics
Zeolites have been widely used for the processes of adsorption, separation, and catalysis, which are strongly correlated with molecular diffusion. However, the correlation between pore dimension and diffusion properties has not been systematically investigated so far. In this work, the diffusion properties of alkanes in six zeolites with similar pore sizes but different pore dimension have been examined. It is found that the diffusion coefficients of alkanes in zeolites are 2–5 orders of magnitude smaller than that in gas phase. Moreover, the diffusion of alkanes inside zeolites is sensitive to the pore dimension, and can be differentiated by 1‐D straight, 1‐D tortuous, and 3‐D intersecting channels, based on the derived quantitative correlation between the diffusion behavior and pore dimension. Our work may not only provide deep insights into the effects of pore dimension on diffusion, but also benefits for the future design and practical applications of zeolite catalysts.