Investigation of temperature dependence of the interaction second virial coefficient using gas-liquid chromatography

Abstract

A high-pressure gas-liquid chromatograph (g.l.c.) has been produced to measure the interaction second virial coefficient (B₁₂) of nitrogen with benzene, cyclohexane and n-hexane on di-isodecyl phthalate stationary phase. The unit was used up to 6 atm pressure and from 30 to 70°C. The present investigation was carried out to study the temperature dependence of B₁₂ values for the above systems and to examine the dependence of B₁₂ on structural changes of the C₆ hydrocarbons. he agreement between our B₁₂ values for the nitrogen + benzene system and those previously reported is within the quoted uncertainties, while published values at 35°C for nitrogen + cyclohexane and for nitrogen + n-hexane agree well with our values at 30°C and 40°C. The experimental B₁₂ values have experimental uncertainties of ± 12 cm¹² mol^-1.