Residence Time Distribution Rtd
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. Liquid-phase RTD studies in a flotation column: an analysis between tanks-in-series and axial dispersion models
Abstract The objective of the present study is to evaluate the fluid dynamics of a flotation column (2" in diameter and 6 m in height) based on gas hold-up measurements and, in particular, by applying the liquid-phase RTD (residence time distribution) technique. Additionally, a comparative study is performed between different methodologies used to determine
REM, Int. Eng. J.. Publicado em: 2021-01
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2. INFLUENCE OF RESIDENCE-TIME DISTRIBUTION ON A SURFACE-RENEWAL MODEL OF CONSTANT-PRESSURE CROSS-FLOW MICROFILTRATION
Abstract This work examines the influence of the residence-time distribution (RTD) of surface elements on a model of cross-flow microfiltration that has been proposed recently (Hasan et al., 2013). Along with the RTD from the previous work (Case 1), two other RTD functions (Cases 2 and 3) are used to develop theoretical expressions for the permeate-flux decl
Braz. J. Chem. Eng.. Publicado em: 2015-03
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3. Distribuição do tempo de residência e letalidade no processamento térmico contínuo de líquidos com escoamento laminar não ideal em trocadores bitubulares. / Residence time distribution and lethality in the continuous thermal processing of liquids with non ideal laminar flow in bitubular exchangers.
Tubular heat exchangers are widely used for thermal processing of viscous liquid foods because they have larger hydraulic diameters than the plate heat exchangers. The calculation of lethality in this type of exchanger is directly related to velocity profile and the residence time distribution (RTD). For the laminar flow of viscous fluids, Newtonian and non-
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/03/2012
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4. Investigation of hydrodynamic parameters in a novel expanded bed configuration: local axial dispersion characterization and an empirical correlation study
Study of liquid behavior in an expanded bed adsorption (EBA) system is important for understanding, modeling and predicting nanobioproduct/biomolecule adsorption performance in such processes. In this work, in order to analyze the local axial dispersion parameters, simple custom NBG (Nano Biotechnology Group) expanded bed columns with 10 and 26 mm inner diam
Braz. J. Chem. Eng.. Publicado em: 2012-12
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5. Factorial design to quantify the influence of extrusion parameters in the mean residence time
Residence time distribution (RTD) is a very important parameter in extrusion, either for simple polymer processing or for special processes like compounding, blending, reactive compatibilization, and controlled degradation. This work deals with the values of mean residence time (t n) as a function of the number of 45 degrees kneading elements in the screw pr
Polímeros. Publicado em: 19/11/2010
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6. Recuperação e purificação de proteínas do soro de queijo tipo coalho usando cromatografia de troca iônica e interação hidrofóbica em leito na forma expandida
Expanded Bed Adsorption plays an important role in the downstream processing mainly for reducing costs as well as steps besides could handling cells homogenates or fermentation broth. In this work Expanded Bed Adsorption was used to recover and purify whey proteins from coalho cheese manufacture using Streamline DEAE and Streamline SP both ionic resins as we
Publicado em: 2010
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7. Modelo matemático para avaliação hidrodinâmica em reatores tubulares operando em regime não-permanente / Mathematical model for hydrodynamic evaluation of pipe reactors with diffusion operated in non-steady flow
Mathematical models for hydrodynamic characteristics evaluation of reactors are commonly used however there is a lack of information in the literature concerning the application of mathematical modeling for non-steady state flow. In this thesis, it is presented a non-steady mathematical model to simulate the hydrodynamic behavior of pipe flow reactors with d
Publicado em: 2008
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8. AnÃlise dinÃmica de um forno rotativo piloto contÃnuo para produÃÃo de gesso beta com GLP
Direct contact rotary kilns are widely used equipments with many industrial applications. The evaluation of the residence-time of the particles on these reactors is fundamental in the development of controlled and optimized systems. In the present work, a technique to measure the residence-time distribution (RTD) was developed in a rotary kiln of 5,45m long
Publicado em: 2005
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9. Estudo da sintese de frutoligossacarideos por levanasacarase imobilizada em reator de coluna
Frutoligossacarídeos são oligômeros de frutose compostos principalmente de 1-kestose, nistose e frutosilnistose e podem ser produzidos a partir de sacarose através da ação de transfrutosilação de enzimas obtidas de vários microrganismos e plantas. Frutoligossacarídeos são utilizados como adoçantes não digeríveis na alimentação humana e consid
Publicado em: 2003
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10. Oxidação umida catalitica da lignina em reatores trifasicos com produção de aldeidos aromaticos
The lignocellulosic material, representing the largest natural renewable resource, occurring in the plants under the cellulose form, hemicellulose, lignin and extractive, with the lignina corresponding about 30% of this total one. The routes of lignin chemical processing, with prominence for the oxidations processes, with the objective of vanilin production,
Publicado em: 2001