Characterization of Porous Silica Materials withWater at Ambient Conditions. Calculating the Pore Size Distribution from the Excess Surface Work Disjoining Pressure Model

被引：9

作者：

Georgi, Nikolaj ^{[1
,2
]}

Kolesnikov, Andrei ^{[2
]}

Uhlig, Hans ^{[2
]}

Moellmer, Jens ^{[2
]}

Rueckriem, Michael ^{[3
]}

Schreiber, Andreas ^{[3
]}

Adolphs, Juergen ^{[3
]}

Enke, Dirk ^{[4
]}

Glaeser, Roger ^{[2
,4
]}

机构：

[1] GMBU Gesell Forderung Med Bio & Umwelttechnol eV, Erich Neuss Weg 5, D-06120 Halle, Saale, Germany

[2] Inst Nichtklass Chem eV, Permoserstr 15, D-04318 Leipzig, Germany

[3] POROTEC GmbH, Niederhofheimer Str 55A, D-65719 Hofheim, Germany

[4] Univ Leipzig, Fak Chem & Mineral, Inst Tech Chem, Linnestr 3, D-04103 Leipzig, Germany

来源：

CHEMIE INGENIEUR TECHNIK | 2017年 / 89卷 / 12期

关键词：

Density functional theory; Excess surface work; MCM-41; Pore size distribution; Water adsorption; PSEUDOMORPHIC TRANSFORMATION; RECOMMENDATIONS; ISOTHERMS; SYSTEMS; MCM-41;

D O I：

10.1002/cite.201700042

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Characterization of mesoporous materials today is routinely performed recording the adsorption isotherm of nitrogen at 77K. The pore size distribution (PSD) can subsequently be determined using either thermodynamics or statistical mechanics based approaches. While nitrogen has evolved as the reference adsorptive, other gases are often used to extract more information from the isotherm. This contribution is focused on the calculation of a PSD from the water vapor isotherm. It is demonstrated that water adsorption provides accurate results comparable to the standard nitrogen adsorption.

引用

页码：1679 / 1685

页数：7

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