ISSN:
0001-1541
Keywords:
Chemistry
;
Chemical Engineering
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Solubilities of solid carbon dioxide in liquid ethane, propane, and n-butane were measured from the hydrocarbon triple point or mixture eutectic point to the triple point of carbon dioxide, and an experimental uncertainty was determined for each data point. A eutectic point was discovered in the carbon dioxide-n-butane system at approximately 134°K., with a eutectic composition of approximately 0.25 mole % carbon dioxide. A nonlinear least squares analysis was used to fit the binary solubility data and carbon dioxide-methane data from the literature to the Wilson equation for the liquid-phase carbon dioxide activity coefficient. Better agreement with experimental data was obtained by adding two empirical constants to the Wilson equation. This study shows that the Wilson equation is an excellent model for solid carbon dioxide solubility in liquid methane, ethane, propane, and n-butane, over the entire composition range, and that the Wilson equation provides a better model than do corrections based on regular solution theory.The ternary system carbon dioxide-methane-ethane was also studied, and liquid and vapor compositions were measured for each of ten ternary mixtures in solid-liquid-vapor equilibrium. Ternary phase diagrams were constructed, and an empirical correlation was derived for solid carbon dioxide solubility in methane-ethane mixtures above 166°K. An important finding was that solid carbon dioxide is more soluble in some mixtures of methane and ethane than in either of the pure components.
Additional Material:
9 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/aic.690170223
Permalink
