Infinite dilution activity coefficients of C2–C8hydrocarbons in alkylcyclohexanes

✍ Scribed by David W. Morton; Colin L. Young

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 168 KB
• Volume: 30
• Category: Article
• ISSN: 0021-9614
• DOI: 10.1006/jcht.1997.0284

✦ Synopsis

Ž ϱ . Ž . Infinite dilution activity coefficients ␥ for mixtures of alkanes C ᎐C in alkylcyclohexanes 13 3 8 Ž . Ž . C ᎐ C , and alkenes in alkylcyclohexanes C ᎐C , are reported. These were determined 10 18 10 18

using gas᎐liquid chromatography where the alkylcyclohexanes form the stationary phase. A lattice theory for liquids, which has been previously applied to hydrocarbon mixtures, was used to calculate interchange energies from the experimental results. This theory was also Ž . Ž . applied to existing cyclohexane q alkane and alkane q nonadecylcyclohexane data with these interchange energies compared with values determined from the ␥ ϱ results reported in 13 Ž . this work. There was good agreement 1 to 5 per cent between predicted and experimental ϱ Ž . ␥results for alkane q alkylcyclohexane mixtures. However, this was found not to be the 13 Ž . case for the alkene q alkylcyclohexane mixtures where the alkene segment CH CH 2 was assumed to behave similarly to the CH CH segment. The differences between 2 2 experimental and theoretical ␥ ϱ values for these types of mixtures were of the order of 30 13 Ž . per cent when using interchange energies derived from alkane q alkylcyclohexane mixtures.