Gas hydrates of methane, ethane, propane, and carbon dioxide in the presence of single NaCl, KCl, and CaCl2 aqueous solutions: Experimental measurements and predictions of dissociation conditions

Abstract Experimental dissociation data for methane, ethane, propane, and carbon dioxide simple hydrates in the presence of NaCl, KCl, and CaCl 2 aqueous solutions with different concentrations of single salt are reported in this communication. The experimental data were generated using a reliable isochoric technique. Some of the experimental hydrate dissociation data measured in this study are compared with some selected experimental data from the literature and the agreements are generally found acceptable, which is a guarantee for the reliability of our experimental technique and the data generated here. All the experimental data are finally compared with the predictions of a general correlation and a thermodynamic model and good agreements between the experimental and predicted data are generally observed.

[1]  B. Tohidi,et al.  Improving the Accuracy of Gas Hydrate Dissociation Point Measurements , 1999 .

[2]  B. Tohidi,et al.  A general correlation for predicting the suppression of hydrate dissociation temperature in the presence of thermodynamic inhibitors , 2005 .

[3]  A. Mohammadi,et al.  Experimental data and predictions of dissociation conditions for ethane and propane simple hydrates in the presence of distilled water and methane, ethane, propane, and carbon dioxide simple hydrates in the presence of ethanol aqueous solutions , 2008 .

[4]  D. Avlonitis,et al.  Thermodynamics of gas hydrate equilibria , 1992 .

[5]  Takao Ebinuma,et al.  Clathrate Hydrate Formed with Methane and 2-Propanol: Confirmation of Structure II Hydrate Formation , 2004 .

[6]  D. Richon,et al.  Experimental measurements and predictions of dissociation conditions for carbon dioxide and methane hydrates in the presence of triethylene glycol aqueous solutions , 2007 .

[7]  Bahman Tohidi Kalorazi,et al.  Gas hydrate equilibria in the presence of electrolyte solutions , 1995 .

[8]  José O. Valderrama,et al.  A Generalized Patel-Teja Equation of State for Polar and Nonpolar Fluids and Their Mixtures , 1990 .

[9]  Carolyn A. Koh,et al.  Clathrate hydrates of natural gases , 1990 .

[10]  B. Tohidi,et al.  Hydrate-free zone for synthetic and real reservoir fluids in the presence of saline water , 1997 .

[11]  Nicolas Kalogerakis,et al.  Equilibrium conditions for carbon dioxide hydrate formation in aqueous electrolyte solutions , 1993 .

[12]  Ali Danesh,et al.  Prediction of VL and VLL equilibria of mixtures containing petroleum reservoir fluids and methanol with a cubic EoS , 1994 .