Abstract
The phase behavior of the systems CO 2 /Rp70 (hardened rapeseed oil), CO 2 /tripalmitin, CO 2 /hydrogenated castor oil (HCO) and propane/Rp70 was studied experimentally according to the synthetic method using a Cailletet apparatus. For the CO 2 /Rp70 system bubble-point curves and solid–liquid curves were determined for CO 2 concentrations from 5 up to 30 wt%. A comparison was made between the phase behavior of these systems and the phase behavior of the systems propane/tripalmitin. The solubility of propane in tripalmitin is markedly higher as compared to the one of CO 2 and tripalmitin. For the propane/Rp70 system liquid–vapor curves, solid–liquid curves and liquid–liquid lower solution temperature curves were measured at propane concentrations from 10 up to 70 wt%. An increase in pressure or a decrease in temperature results in a higher solubility of carbon dioxide or propane in the fat melt. The measurements made it possible to predict qualitatively the phase behavior of the CO 2 /Rp70, CO 2 /tripalmitin, CO 2 /HCO and propane/Rp70 systems. For CO 2 /Rp70, CO 2 /tripalmitin, CO 2 /HCO systems a type III system was observed according to the classification of Van Konynenburg and Scott [7,8]. For propane/Rp70 a type IV phase diagram was observed.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
