Application of logarithmic αx-axis on adsorption isotherms to improve micropore analysis

Xiaodan Guo; Yu Han; Yongcun Zou; Dongsheng Li; Jihong Yu; Shilun Qiu; Feng Shou Xiao

doi:10.1016/S1387-1811(00)00341-3

Application of logarithmic αx-axis on adsorption isotherms to improve micropore analysis

Xiaodan Guo, Yu Han, Yongcun Zou, Dongsheng Li, Jihong Yu, Shilun Qiu, Feng Shou Xiao

Jilin University

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

The adsorption isotherms for N₂ over zeolite samples with various structure types or various crystal sizes have been investigated systematically. It is interesting to note that the powder samples of zeolites with cavity structures show oscillation phenomena in their adsorption isotherms on logarithmic x-axis, but the samples without cavities do not show this phenomenon. With increase in the size of the zeolite crystals, the oscillation phenomenon becomes more remarkable. If crystals are large enough and have complex channel structures, even if they do not have cavities, they also exhibit a slight oscillation phenomenon. These results are very helpful to pre-determine which model should be applied for a new sample with an unknown structure, and to get more reliable data on its pore size distribution when Horvath-Kawazoe equation is used to calculate its pore size distribution.

Original language	English
Pages (from-to)	325-336
Number of pages	12
Journal	Microporous and Mesoporous Materials
Volume	42
Issue number	2-3
DOIs	https://doi.org/10.1016/S1387-1811(00)00341-3
Publication status	Published - Feb 2001
Externally published	Yes

Keywords

Adsorption isotherms on logarithmic x-axis
Micropores
Pore size distribution
Zeolites

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10.1016/S1387-1811(00)00341-3

Cite this

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title = "Application of logarithmic αx-axis on adsorption isotherms to improve micropore analysis",

abstract = "The adsorption isotherms for N2 over zeolite samples with various structure types or various crystal sizes have been investigated systematically. It is interesting to note that the powder samples of zeolites with cavity structures show oscillation phenomena in their adsorption isotherms on logarithmic x-axis, but the samples without cavities do not show this phenomenon. With increase in the size of the zeolite crystals, the oscillation phenomenon becomes more remarkable. If crystals are large enough and have complex channel structures, even if they do not have cavities, they also exhibit a slight oscillation phenomenon. These results are very helpful to pre-determine which model should be applied for a new sample with an unknown structure, and to get more reliable data on its pore size distribution when Horvath-Kawazoe equation is used to calculate its pore size distribution.",

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author = "Xiaodan Guo and Yu Han and Yongcun Zou and Dongsheng Li and Jihong Yu and Shilun Qiu and Xiao, {Feng Shou}",

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T1 - Application of logarithmic αx-axis on adsorption isotherms to improve micropore analysis

AU - Guo, Xiaodan

AU - Han, Yu

AU - Zou, Yongcun

AU - Li, Dongsheng

AU - Yu, Jihong

AU - Qiu, Shilun

AU - Xiao, Feng Shou

PY - 2001/2

Y1 - 2001/2

N2 - The adsorption isotherms for N2 over zeolite samples with various structure types or various crystal sizes have been investigated systematically. It is interesting to note that the powder samples of zeolites with cavity structures show oscillation phenomena in their adsorption isotherms on logarithmic x-axis, but the samples without cavities do not show this phenomenon. With increase in the size of the zeolite crystals, the oscillation phenomenon becomes more remarkable. If crystals are large enough and have complex channel structures, even if they do not have cavities, they also exhibit a slight oscillation phenomenon. These results are very helpful to pre-determine which model should be applied for a new sample with an unknown structure, and to get more reliable data on its pore size distribution when Horvath-Kawazoe equation is used to calculate its pore size distribution.

AB - The adsorption isotherms for N2 over zeolite samples with various structure types or various crystal sizes have been investigated systematically. It is interesting to note that the powder samples of zeolites with cavity structures show oscillation phenomena in their adsorption isotherms on logarithmic x-axis, but the samples without cavities do not show this phenomenon. With increase in the size of the zeolite crystals, the oscillation phenomenon becomes more remarkable. If crystals are large enough and have complex channel structures, even if they do not have cavities, they also exhibit a slight oscillation phenomenon. These results are very helpful to pre-determine which model should be applied for a new sample with an unknown structure, and to get more reliable data on its pore size distribution when Horvath-Kawazoe equation is used to calculate its pore size distribution.

KW - Adsorption isotherms on logarithmic x-axis

KW - Micropores

KW - Pore size distribution

KW - Zeolites

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ER -

Application of logarithmic αx-axis on adsorption isotherms to improve micropore analysis

Abstract

Keywords

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