Adsorption-Induced Deformation of Mesoporous Solids

被引：135

作者：

Gor, Gennady Yu. ^{[1
]}

Neimark, Alexander V. ^{[1
]}

机构：

[1] Rutgers State Univ, Dept Chem & Biochem Engn, Piscataway, NJ 08854 USA

来源：

LANGMUIR | 2010年 / 26卷 / 16期

关键词：

DENSITY-FUNCTIONAL THEORY; CAPILLARY CONDENSATION; PORE STRUCTURE; THEORY MODEL; SORPTION; EXPANSION; CHARCOAL; THERMODYNAMICS; NITROGEN; STRAINS;

D O I：

10.1021/la1019247

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The Derjaguin-Broekholf-de Boer theory of capillary condensation is employed to describe deformation of mesoporous solids in the course of adsorption-desorption hysteretic cycles. We suggest a thermodynamic model, which relates the mechanical stress induced by the adsorbed phase to the adsorption isotherm. Analytical expressions are derived for the dependence of the solvation pressure on the vapor pressure. The proposed method provides a description of nonmonotonic hysteretic deformation during capillary condensation without invoking any adjustable parameters. The method is showcased drawing on the examples of literature experimental data on adsorption deformation of porous glass and SBA-15 silica.

引用

页码：13021 / 13027

页数：7

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