To investigate the effect of alkane molecular structure
on the
volume expansion of CO2 + alkane systems, the solubility
of CO2 in hexane, octane, decane, and cyclohexane and the
volume of CO2 + alkanes at different temperature and pressure
was measured with a PVT apparatus. The results imply
that the dispersion state of CO2 molecules in the alkane
phase under near critical or supercritical condition of CO2 plays a dominate role in increasing the volume of CO2 + alkane systems. The solubility of CO2 in the alkanes,
the volume expansion of the CO2 + alkane systems, and the
London force operating within alkane molecules are strongly influenced
by molecular structure of the alkanes and pressure.
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