کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
230655 | 1427404 | 2013 | 7 صفحه PDF | دانلود رایگان |
The equilibrium quaternary solubilities of dihydroxybenzene (resorcinol + pyrocatechol + hydroquinone + SCCO2) isomers were experimentally determined at 308, 318 and 328 K over a pressure range of 9.8–15.7 MPa by using a saturation method. The effects of temperature, pressure and the components on each other have been thoroughly investigated. The selectivity of SCCO2 for ternary (resorcinol + pyrocatechol + SCCO2) and quaternary systems was discussed. A new model equation for quaternary solubilities of solids has been developed by accounting for non-idealities by combining the solution model with Wilson activity coefficient model. The model equation has five adjustable parameters and correlates the quaternary solubilities of current data along with two other quaternary data reported in the literature.
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► Quaternary solubilities of dihydroxybenzene isomers in SCCO2 were determined.
► Solubility enhancement and selectivity for quaternary system was discussed.
► A new model equation was derived for quaternary solubilities of solids in SCCO2.
► The equation successfully correlated the quaternary solubilities of three systems.
Journal: The Journal of Supercritical Fluids - Volume 73, January 2013, Pages 63–69