Solubility of crystalline tricosane in supercritical СО2 and in СО2 + cosolvents
I.Sh. Khabriev1, L.Yu. Sabirova1, I.Z. Salikhov1, L.Yu. Yarullin1, V.F. Khairutdinov1, T.R. Bilalov1,2, I.M. Abdulagatov1,3
1Kazan National Research Technological University, Kazan, Russia
2Tupolev National Research Technical University, Kazan, Russia
3Institute for Problems of Geothermy and Renewable Energy - branch of the Joint Institute for High Temperatures of RAS, Makhachkala, Russia
Keywords: supercritical carbon dioxide, tricosane, solubility, phase equilibrium, cosolvent, equation of state
Abstract
The paper presents results of experimental study on the solubility (VLE-properties) for crystalline tricosane in supercritical carbon dioxide (in pure and modified form) in the temperature range 308.15 - 315.15 K and the pressure range 8.00 - 20.32 MPa using the dynamic method. Modification of carbon dioxide fluid was performed by adding several organic solvents, such as dimethylsulfoxide, ethanol, acetone, and chloroform. It was found that using the fluid co-solvents at the concentration of 5 wt. % improves the tricosane solubility by factor of two. The measurement results can be described by the Penga-Robinson equation of state.
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