Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9635818 | The Journal of Supercritical Fluids | 2005 | 7 Pages |
Abstract
Measurements on solid-fluid equilibrium were performed for capsaicin in sub- and supercritical carbon dioxide (CO2) at several temperatures (298, 308, 313 and 318Â K) and over a pressure range from 6 to 40Â MPa, to verify the operation of a new static-analytic set-up. This set-up consisted of a high-pressure static equilibrium cell coupled to a high-performance liquid chromatograph (HPLC). The new equilibrium data have been critically compared with available literature data; some differences were observed, especially at the two highest assayed temperatures. Experimental solubility values were correlated by using three different models, a density-based model, a cubic equation of state with quadratic mixing rules, and a group contribution equation of state. The density correlation results showed good agreement with the experimental data, in contrast to the results of both equations of state.
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Chemical Engineering (General)
Authors
Juan C. de la Fuente, José O. Valderrama, Susana B. Bottini, José M. del Valle,