Modelling of water adsorption by activated carbons: effects of microporous structure and oxygen content

A M  Slasli; M  Jorge; F  Stoeckli; N A  Seaton

doi:10.1016/j.carbon.2004.03.034

Modelling of water adsorption by activated carbons: effects of microporous structure and oxygen content

A M Slasli, M Jorge, F Stoeckli, N A Seaton

Chemical And Process Engineering

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50 Citations (Scopus)

Abstract

The present paper examines the adsorption of water by microporous carbons containing various amounts of surface oxygen and a smaller proportion of basic centres. The modelling of water adsorption for 293 and 310 K, using variable pore size distributions (PSD), confirms that the overall type IV isotherm is the sum of a type I isotherm associated with the specific interactions, and a type V isotherm reflecting the non-specific interactions. The principle of temperature invariance is followed by these isotherms, which indicates that modelling leads to the Dubinin-Astakhov equation. The present approach allows the prediction of water adsorption near room temperature, on the basis of the PSD and the density of oxygen present on the surface area of the micropores. It is assumed, to a first and good approximation, that the pores are slit-shaped and the oxygen distribution is random.

Original language	English
Pages (from-to)	1947-1952
Number of pages	6
Journal	Carbon
Volume	42
Issue number	10
DOIs	https://doi.org/10.1016/j.carbon.2004.03.034
Publication status	Published - 2004

Keywords

activated carbon
adsorption
modelling
microporosity

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10.1016/j.carbon.2004.03.034

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title = "Modelling of water adsorption by activated carbons: effects of microporous structure and oxygen content",

abstract = "The present paper examines the adsorption of water by microporous carbons containing various amounts of surface oxygen and a smaller proportion of basic centres. The modelling of water adsorption for 293 and 310 K, using variable pore size distributions (PSD), confirms that the overall type IV isotherm is the sum of a type I isotherm associated with the specific interactions, and a type V isotherm reflecting the non-specific interactions. The principle of temperature invariance is followed by these isotherms, which indicates that modelling leads to the Dubinin-Astakhov equation. The present approach allows the prediction of water adsorption near room temperature, on the basis of the PSD and the density of oxygen present on the surface area of the micropores. It is assumed, to a first and good approximation, that the pores are slit-shaped and the oxygen distribution is random.",

keywords = "activated carbon, adsorption, modelling, microporosity",

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pages = "1947--1952",

journal = "Carbon",

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TY - JOUR

T1 - Modelling of water adsorption by activated carbons

T2 - effects of microporous structure and oxygen content

AU - Slasli, A M

AU - Jorge, M

AU - Stoeckli, F

AU - Seaton, N A

PY - 2004

Y1 - 2004

N2 - The present paper examines the adsorption of water by microporous carbons containing various amounts of surface oxygen and a smaller proportion of basic centres. The modelling of water adsorption for 293 and 310 K, using variable pore size distributions (PSD), confirms that the overall type IV isotherm is the sum of a type I isotherm associated with the specific interactions, and a type V isotherm reflecting the non-specific interactions. The principle of temperature invariance is followed by these isotherms, which indicates that modelling leads to the Dubinin-Astakhov equation. The present approach allows the prediction of water adsorption near room temperature, on the basis of the PSD and the density of oxygen present on the surface area of the micropores. It is assumed, to a first and good approximation, that the pores are slit-shaped and the oxygen distribution is random.

AB - The present paper examines the adsorption of water by microporous carbons containing various amounts of surface oxygen and a smaller proportion of basic centres. The modelling of water adsorption for 293 and 310 K, using variable pore size distributions (PSD), confirms that the overall type IV isotherm is the sum of a type I isotherm associated with the specific interactions, and a type V isotherm reflecting the non-specific interactions. The principle of temperature invariance is followed by these isotherms, which indicates that modelling leads to the Dubinin-Astakhov equation. The present approach allows the prediction of water adsorption near room temperature, on the basis of the PSD and the density of oxygen present on the surface area of the micropores. It is assumed, to a first and good approximation, that the pores are slit-shaped and the oxygen distribution is random.

KW - activated carbon

KW - adsorption

KW - modelling

KW - microporosity

U2 - 10.1016/j.carbon.2004.03.034

DO - 10.1016/j.carbon.2004.03.034

M3 - Article

SN - 0008-6223

VL - 42

SP - 1947

EP - 1952

JO - Carbon

JF - Carbon

IS - 10

ER -

Modelling of water adsorption by activated carbons: effects of microporous structure and oxygen content

Abstract

Keywords

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