Solubility of CO2, N-2, and CO2+N-2 gas mixtures in isooctane

Abstract

The solubility of CO2 in isooetane at 270.8 K, 275.0 K, and 282.5 K and at pressures from (1.46 to 3.64) MPa and the solubility of N-2 in isooctane at 269.9 K, 274.5 K, and 282.3 K and at pressures from (2.70 to 9.45) MPa were measured. The solubility of CO2 in isooctane is one order of magnitude greater than that in water at the same conditions. Temperature has no significant effect on the solubility of N-2 in isooctane. The equilibrium compositions of CO2 and N-2 binary mixtures in isooctane at 273.8 K and at a CO2 mole fraction range of (0.079 to 0.675) in the gas phase were also determined. The selectivity of C02 over N2 in isooctane ranges from (7.2 to 14.6) at 273.8 K.