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- W2620192009 abstract "Fundamental and applied research onsupercritical fluid (SCF) technology is of importance insuccessfully developing applications in many industrial arenas. Thesuccess of this technology is reflected in the several applicationsdeveloped to date in the food, pharmaceutical, textile, wastetreatment, precision and garment dry cleaning, and petroleumindustries. To identify several more potential applications,experimental and computational studies provide well-founded toolsthat allow a deeper understanding of the nature of fluids in thesupercritical state. Among all the wide variety of interestingstudies that can emerge from this technology, we focused on threemain concerns to obtain a better insight into SCF’s: (1) thecomputational study of high-pressure chemical and multiphaseequilibrium and the importance of mathematical validation of thenumber of phases and composition after reaction, (2) theexperimental and modeling of solubilities of solutes in SCF’s, and(3) the design and optimization of supercritical extractionprocesses (SFE). First we present V-CHASEOS, a validatedcomputational tool that correctly estimates the number of phasesand compositions of reacting and non-reacting systems inequilibrium. Our methodology takes good advantage of the wealth oftechniques that combined with the interval methodology validatescorrect results, identifies incorrect results, and provides acorrective feedback until a correct answer is found. Five samplecases are presented to highlight the benefits of this methodology.For the second part, the solubility of three compounds ofpharmaceutical and biochemical importance (caffeine, uracil anderythromycin) in supercritical CO2 were studied. Solid-fluidequilibrium curves are modeled according to the Peng-RobinsonEquation of State (PR EOS) and compared to the experimentalresults. Different parameter estimation techniques are alsostudied. Finally, a computational method for the optimization ofSFE processes is studied. We implement a process synthesistechnique called Generalized Modular Framework (GMF) thatsystematically allows, without prepostulation of unit operations,the determination of optimum process schemes based onmultifunctional mass/heat transfer-based process modules. As asample case, optimization of the recovery of solutes from asubstrate containing anthracene, phenanthrene and benzoic acidusing supercritical CO2 is presented." @default.
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- W2620192009 date "2004-04-07" @default.
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- W2620192009 title "Supercritical Fluid Technology: Computational and Experimental Equilibrium Studies and Design of Supercritical Extraction Processes" @default.
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