Gas hydrates in low water content gases: Experimental measurements and modelling using the CPA equation of state

被引：36

作者：

Chapoy, Antonin ^{[1
]}

Haghighi, Hooman ^{[1
]}

Burgass, Rod ^{[1
]}

Tohidi, Bahman ^{[1
]}

机构：

[1] Heriot Watt Univ, Ctr Gas Hydrate Res, Inst Petr Engn, Edinburgh EH14 4AS, Midlothian, Scotland

来源：

FLUID PHASE EQUILIBRIA | 2010年 / 296卷 / 01期

关键词：

Gas hydrate; Water; Methane; Water content; CPA equation of state; Experimental data; Thermodynamic modelling; ELECTROLYTE-SOLUTIONS; METHANE; EQUILIBRIUM; PROPANE;

D O I：

10.1016/j.fluid.2009.11.026

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

In this communication, new experimental data are reported for the water content of methane and two synthetic gas mixtures in equilibrium with hydrates at pressures range from 5 to 40 MPa and temperature down to 251.65 K. The measurements have been made on equilibrated samples taken from a high-pressure variable volume hydrate cell using a new analyser based upon tuneable diode laser absorption spectroscopy (TDLAS) technology. A statistical thermodynamic approach, with the Cubic-Plus-Association equation of state, is employed to model the phase equilibria. The hydrate-forming conditions are modelled by the solid solution theory of van der Waals and Platteeuw. The thermodynamic model was used to predict the water content of methane and synthetic gases in equilibrium with gas hydrates. (c) 2009 Elsevier B.V. All rights reserved.

引用

页码：9 / 14

页数：6