Phase Equilibria of Alkanes in Natural Gas Systems. 3. Alkanes in Carbon Dioxide

Abstract

A chromatographic technique was used to measure experimental capacity factors for the n -alkanes from C 9 H 20 to C 36 H 74 in CO 2 from 308.2 to 348.2 K and from 100 to 240 bar. Infinite dilution activity coefficients, γ i ∞, were calculated for the solid n -alkanes (C 24 H 50 to C 36 H 74 ) utilizing regular solution theory to characterize the stationary phase. This allowed the estimation of solubilities from capacity factors for the solid n -alkanes in CO 2 .