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dc.contributor.authorSamyudia, Yudi
dc.contributor.authorPanau, Freddie
dc.contributor.authorLiong, Y. I.
dc.contributor.editorAmerican Institute of Chemical Engineers
dc.identifier.citationSamyudia, Y. and Panau, F. and Liong, Y. I. 2008. Hydrodynamics modeling and analysis of rapid expansion systems of supercritical solutions (RESS), in American Institute of Chemical Engineers (ed), 2008 AIChE Annual Meeting, Nov 16 2008. Philadelphia, PA, USA: Omnipress

In this paper, we study the hydrodynamics aspects of the RESS (e.g. rapid expansion of supercritical solutions) process to produce fine particles for heat-sensitive organic compounds. The Computational Fluid Dynamic (CFD) modeling and analysis of the supercritical solutions passing through a capillary nozzle were studied. The CFD simulation is focused on the pre-expansion chamber of the RESS process consisting of three successive steps that are at the stagnation chamber (i.e. the reservoir), nozzle inlet and along the nozzle itself to the outlet. The solute considered is benzoic acid and the supercritical solvents are CO2 and CHF3 respectively. The aim of this study is to examinethe effect and sensitivity of the design parameters (i.e. temperature, pressure and density) on the formation of particulates in the chamber. The study reveals that at lower preexpansion temperature with constant pre-expansion pressure the solute nucleation seems to start inside the nozzle. Moreover, it is also found that pre-expansion pressure has insignificant effect on the nucleation process, i.e. the nucleation rate slightly increases when the pressure is set higher. Furthermore, the study also reveals that high preexpansion pressures and low pre-expansion temperature favors small particles. The results demonstrate that the variation of thee parameters in the ranges studied may lead to the increased super-saturation and simultaneously increase in nucleation rate.

dc.subjectParticle formation
dc.subjectCFD Modeling
dc.titleHydrodynamics modeling and analysis of rapid expansion systems of supercritical solutions (RESS)
dc.typeConference Paper
dcterms.source.title2008 AIChE Annual Meeting
dcterms.source.series2008 AIChE Annual Meeting
dcterms.source.conference2008 AIChE Annual Meeting
dcterms.source.conference-start-dateNov 16 2008
dcterms.source.conferencelocationPhiladelphia, PA, USA
dcterms.source.placeNew York, USA
curtin.departmentCurtin Sarawak - Faculty Office
curtin.accessStatusOpen access
curtin.facultyFaculty Office
curtin.facultyCurtin Sarawak

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