New Thermodynamic Model of Equilibrium States of Gas Hydrates Considering Lattice Distortion

被引：47
作者：
Martin, A. [1 ]
Peters, C. J. [1 ,2 ]
机构：
[1] Delft Univ Technol, Dept Proc & Energy, Fac Mech Maritime & Mat Engn, NL-2628 CA Delft, Netherlands
[2] Petr Inst, Chem Engn Program, Abu Dhabi, U Arab Emirates
来源：
JOURNAL OF PHYSICAL CHEMISTRY C | 2009年 / 113卷 / 01期
关键词：
EQUATION-OF-STATE; DISSOCIATION PRESSURES; SOLUBILITY MEASUREMENT; HYDROGEN CLUSTERS; THERMAL-EXPANSION; AQUEOUS-SOLUTIONS; PHASE-EQUILIBRIA; ETHYLENE-OXIDE; CAGE OCCUPANCY; WATER;
D O I：
10.1021/jp8074546
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：
A new model for the calculation of single and mixed clathrate hydrate phase boundaries which explicitly takes into account lattice distortion caused by the guests is presented. Lattice distortion is modeled by introducing a distortion chemical potential, which is treated as a correlation parameter. A relationship between the correlated distortion chemical and the ratio between the molecular diameter of the guest and the mean diameter of the smallest occupied hydrate cavity has been found, which supports the physical interpretation of this term. The model has similar accuracy to previous clathrate hydrate thermodynamic models while reducing the number of correlated parameters to one or two depending on the system.
引用
收藏
页码：422 / 430
页数：9
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