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Mass Transfer Modelling in Counter-Current Crossed Flows in an Industrial Extractor

Paper ID Volume ID Publish Year Pages File Format Full-Text
19555 43074 2007 8 PDF Available
Title
Mass Transfer Modelling in Counter-Current Crossed Flows in an Industrial Extractor
Abstract

A new mathematics model is developed for counter-current crossed (CCC) flows of the porous media and miscela applied in an industrial extractor ‘Rotocell’. There are considered: oil diffusion in extraction field, mass transfer between pore and bulk phases, influence of trays, existence of drainage and loading zones, the variation of the viscosity and density of miscela, oil losses and the transient operational regime. The coupled mathematical model is composed of partial differential equations and ordinary differential equations with boundary conditions that link the percolation sections, the trays, the drainage and loading zones in outline of the CCC flows. The calculation algorithm is based on the method of lines. Different from the method of multi-stages, the new model is sensitive to changes in raw material characteristics, section sizes and wagon parameters. The new model also presents the spatial concentration distributions of pore and bulk phases in the extraction field.

Keywords
vegetable oil extraction; mathematical model; method of lines; counter-current crossed flows; porous media
First Page Preview
Mass Transfer Modelling in Counter-Current Crossed Flows in an Industrial Extractor
Publisher
Database: Elsevier - ScienceDirect
Journal: Food and Bioproducts Processing - Volume 85, Issue 2, June 2007, Pages 77–84
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering