Thermal Density Fluctuations and Polymorphic Phase Transitions of Ethane (C2D6) in the Gas/Liquid and Supercritical States
Vitaliy Pipich,
Joachim Kohlbrecher,
Dietmar Schwahn
Abstract:The phase behavior
of the liquid C2D6 below
and above the critical point was investigated using small-angle neutron
scattering (SANS) in temperature and pressure ranges from 10 to 45
°C and 20 to 126 bar, respectively. The scattering of thermal
fluctuations of the molecular density was determined and thus the
gas–liquid and Widom lines. At the same time, we observed additional
scattering of droplets of more densely packed C2D6 molecules above the gas–liquid line and in the supercritical
fluid regime from just … Show more
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