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Single and Two-Phase Flows on Chemical and Biomedical Engineering (2012) 174 - 195.pdfCapitol de llibre917,86 kBAdobe PDF Accés restringit

Citació: Guardo, A. [et al.]. Using CFD to estimate external mass transfer coefficients and intra-particle diffusional effects on the supercritical hydrogenation of sunflower oil. A: "Single and two-phase flows on chemical and biomedical engineering". Bussum: Bentham Science Publishers, 2012, p. 174-195.
Títol: Using CFD to estimate external mass transfer coefficients and intra-particle diffusional effects on the supercritical hydrogenation of sunflower oil
Autor: Guardo Zabaleta, Alfredo de Jesús Veure Producció científica UPC; Ramírez Rangel, Eliana Veure Producció científica UPC; Larrayoz Iriarte, María Angeles Veure Producció científica UPC; Recasens Baxarías, Francisco Javier Veure Producció científica UPC
Editorial: Bentham Science Publishers
Data: 2-set-2012
Tipus de document: Part of book or chapter of book
Resum: Hydrogenation of vegetable oils is an important process in the food industry because of its widespread application to produce margarines, shortenings, and other food components. Supercritical technology has proven to be a reliable alternative to conventional hydrogenation process because not only the trans isomer levels can be reduced, but also offers a clean, economic and environmental friendly process. Computational Fluid Dynamics (CFD) modeling applied to the supercritical hydrogenation reaction can be useful in visualizing and understanding the mass transfer phenomena involved. CFD is applied to the study of the catalytic hydrogenation of sunflower oil in the presence of a supercritical solvent. A mix of sunflower oil, hydrogen and supercritical propane (used as a solvent) is the flowing fluid. Their transport properties at high pressure are incorporated within a CFD commercial code in order to estimate them online within the simulation process. A 2D CFD model of a single Pd-based catalyst pellet is presented. Intra-particle and surface concentration profiles and surface mass fluxes for all species present in the mixture (oil triglycerides and hydrogen) are obtained and compared against experimental results. Different temperatures, flow velocities and particle sizes are studied and external and internal mass transfer phenomena are analyzed. External mass transfer coefficients for hydrogen and oil triglycerides are obtained and a correlation for estimating them is presented.
ISBN: 978-1-60805-504-3
URI: http://hdl.handle.net/2117/16811
DOI: 10.2174/97816080529501120101
Versió de l'editor: http://www.benthamscience.com/ebooks/9781608052950/index.htm
Apareix a les col·leccions:Altres. Enviament des de DRAC
FLUIDS - Enginyeria de Fluids. Capítols de llibre
Departament de Mecànica de Fluids. Capítols de llibre
Departament d'Enginyeria Química. Capítols de llibre
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