L. Yu. Sabirova, L. Yu. Yarullin, I. Sh. Khabriev, V. F. Khairutdinov, T. R. Bilalov
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引用次数: 0
Abstract
The solubility of betulin in pure and modified supercritical carbon dioxide (SC-CO2) at 313.15–333.15 K and 8.0–30.0 MPa is experimentally studied by the dynamic method. It is found that betulin swells in pure SC-CO2 without being dissolved. The solubility of betulin increases upon the addition of 5% ethanol as a cosolvent. The pressures corresponding to the first and second crossover points are determined to be 7.7–8.3 and 27.1–27.6 MPa, respectively. The experimental data are described using a model based on the Peng–Robinson equation of state.
期刊介绍：
Russian Journal of Physical Chemistry B: Focus on Physics is a journal that publishes studies in the following areas: elementary physical and chemical processes; structure of chemical compounds, reactivity, effect of external field and environment on chemical transformations; molecular dynamics and molecular organization; dynamics and kinetics of photoand radiation-induced processes; mechanism of chemical reactions in gas and condensed phases and at interfaces; chain and thermal processes of ignition, combustion and detonation in gases, two-phase and condensed systems; shock waves; new physical methods of examining chemical reactions; and biological processes in chemical physics.
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