Behavior of water and methane bound to hydrophilic and hydrophobic nanosilicas and their mixture

被引：9

作者：

Gun'ko, Vladimir M. ^{[1
]}

Turov, Vladimir V. ^{[1
]}

Krupska, Tetyana V. ^{[1
]}

Pakhlov, Eugeniy M. ^{[1
]}

机构：

[1] Chuiko Inst Surface Chem, Gen Naumov St 17, UA-03164 Kiev, Ukraine

来源：

CHEMICAL PHYSICS LETTERS | 2017年 / 690卷

关键词：

Hydrophilic nanosilica; Hydrophobic nanosilica; Structural organization; Bound water; Methane adsorption; HYDRATE FORMATION; NANO-SILICA; ADSORPTION; PARAMETERS; DIFFUSION; DYNAMICS;

D O I：

10.1016/j.cplett.2017.10.039

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Methane adsorption onto hydrated (0.1 g/g) initial and compacted nanosilica A-50 and compacted A-50/hydrophobic AM1 (based on nanosilica A-300) and water behavior vs. temperature were analyzed using H-1 NMR and theoretical methods. Methane adsorption increases with temperature because of changes in structure of mobile water. Stronger compaction of A-50 than that of A-50/AM1 (due to negative effect of AM1 preventing formation of tight contacts between A-50 nanoparticles) leads to decrease in adsorption of methane onto dense A-50 alone. These effects cause the difference in temperature behavior of bound water. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：25 / 30

页数：6

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