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Teses / dissertações sobre o tema "Mass transfer"

Autor: Grafiati

Publicado: 4 de junho de 2021

Última modificação: 25 de julho de 2025

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1

Springer, Pieter Ariaan Martijn. "Mass transfer effects in distillation." [S.l. : Amsterdam : s.n.] ; Universiteit van Amsterdam [Host], 2004. http://dare.uva.nl/document/88084.

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2

McAleavey, Gervase. "Mass transfer studies in fermentation." Thesis, Queen's University Belfast, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.356899.

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3

Erasmus, Andre Brink. "Mass transfer in structured packing." Thesis, Stellenbosch : University of Stellenbosch, 2004. http://hdl.handle.net/10019.1/16045.

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Thesis (PhD)--University of Stellenbosch, 2004.<br>ENGLISH ABSTRACT: Structured packing is a popular column internal for both distillation and absorption unit operations. This is due to the excellent mass transfer characteristics and low pressure drop that it offers compared to random packing or trays. The main disadvantage is the lack in reliable models to describe the mass transfer characteristics of this type of packing. The recent development of the non-equilibrium model or rate based modelling approach has also emphasized the need for accurate hydraulic and efficiency models for she

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4

Zhao, Xiaomin. "Formaldehyde mass-transfer properties study." Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/51597.

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Formaldehyde, an important feedstock in industrial processes and manufacture, is widely present in numerous consumer products. Emitted by many types of consumer products and indoor materials, indoor air can contain high concentrations of formaldehyde. Exposure to formaldehyde is hazardous to human health. Thus knowledge of formaldehyde mass-transfer properties is critical to efforts to reduce formaldehyde emissions and establish related standards and regulations. The primary objectives of this project include: 1) documenting and validating procedures and methods for analyzing and measuring

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5

Xu, Feishi. "Bubble hydrodynamics and mass transfer in complex media." Thesis, Toulouse, INSA, 2019. http://www.theses.fr/2019ISAT0003.

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La connaissance du comportement hydrodynamique et du transfert de matière de la bulle est importante car elle fournira des indications pour la sélection des conditions de fonctionnement et la conception du réacteur dans de tels processus. Cette thèse a réalisé une étude expérimentale pour les bulles d’air isolées en ascension dans diverses solutions de polymères (Breox, Polyacrylamide (PAAm) and Xanthan gum) qui peuvent simuler les propriétés des eaux usées. Les travaux sont divisés en trois parties: Tout d’abord, en dressant l’état de l'art sur les techniques de visualisation pour le transfer

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6

Raison, Christian E. "Mass transfer in aerated vibrated beds." Thesis, This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-03032009-040719/.

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7

Vasan, S. S. "Analysis of mass transfer in ultrafiltration." Thesis, University of Oxford, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.424738.

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8

Hanif, Mohammed. "Mass transfer studies in solvent extraction." Thesis, Teesside University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.328022.

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9

DUARTE, LUIZ GUSTAVO DA CRUZ. "MASS TRANSFER TO SWIRL IMPINGING JETS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 1994. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=24868@1.

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O presente trabalho é um estudo experimental das características de troca de calor e massa de um jato de ar incidindo ortogonalmente sobre uma placa. o estudo tem por objetivo avaliar a influência nos coeficientes de troca da presença de um componente circunferencial na velocidade do jato. Durante os experimentos foram investigadas a influência do número de Reynolds do jato, da distância jato/placa e da intensidade do escoamento espiralado (número de swirl). Os coeficientes de troca foram determinados utilizando-se a técnica de sublimação de naftaleno em conjunto com a analogia entre os proves

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10

Kumar, Anil. "Hydrodynamics and mass transfer in Kühni extractor /." [S.l.] : [s.n.], 1985. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=7806.

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11

Gurniki, Francois. "turbulent convective mass transfer in electrochemical systems." Doctoral thesis, KTH, Mechanics, 2000. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3046.

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12

Dogan, Ismail. "Mass Transfer And Kinetics In Oxygen Delignification." Phd thesis, METU, 2004. http://etd.lib.metu.edu.tr/upload/12605562/index.pdf.

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In this study, the kinetic analysis of oxygen delignification of Turkish southern hardwood Kraft pulp was carried out. Kraft pulp was obtained from Mopak Dalaman pulp and paper mill. The kinetic rate data were collected in a 1 L high pressure batch reactor. The delignification experiments were carried out under a wide range of industrially significant conditions of temperature (90, 100 and 110 oC), alkali charge (1, 3, 5% on oven dry pulp), and oxygen partial pressure (0.5, 3.5, 6.5 bar). In order to achieve this objective, the study is separated into different stages. In the first stage of th

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13

Nadim, Pedram. "Irreversibility of combustion, heat and mass transfer." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for energi- og prosessteknikk, 2011. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-13651.

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Combustion is by far the most commonly used technology for energy conversion. The analysis of entropy generation and exergy loss is normally used to optimize thermal energy technologies such as gas turbines. The loss of exergy in the combustor is the largest of all component losses in gas turbine systems. The exergy efficiency of gas turbine combustors is typically 20-30%. In recent years the focus on reduction of climate gas and pollutant emissions from combustion has been a driving factor for research on combustion efficiency. The emphasis on fuel economy and pollution reduction from combust

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14

Agble, Dugald Komla. "Interfacial mass transfer in binary-liquid systems." Thesis, Imperial College London, 1998. http://hdl.handle.net/10044/1/8949.

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15

Keyhani, Alireza. "Heat and mass transfer in layered seedbed." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq23997.pdf.

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16

Gurniki, François. "Turbulent convective mass transfer in electrochemical systems /." Stockholm, 2000. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3046.

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17

Wee, H. K. "Heat and mass transfer in confined spaces." Thesis, University of Canterbury. Chemical and Process Engineering, 1986. http://hdl.handle.net/10092/5879.

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A novel experimental technique had been used to investigate the simultaneous transfer of heat and moisture in a simulated building cavity by natural convection. This technique employed two porous plastic plates as the two cavity walls and this arrangement allowed the imposition of a simultaneous moisture gradient on top of a temperature gradient and vice-versa. Both aiding and opposing-flow conditions were investigated for the vertical and horizontal cavity configuration. The aspect-ratio of the experimental cavity used was 7.0 and the fluid investigated was air. The experimental results were

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18

O'Hare, Kieran D. "Mass transfer at a two-phase interface." Thesis, Queen's University Belfast, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317126.

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19

Sun, Hong. "Hydrodynamics and mass transfer in Venturi scrubbers." Thesis, University of Nottingham, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.404054.

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20

Zhang, Guodong. "Heat and mass transfer in porous media." Thesis, University of Leeds, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.392321.

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21

Reichrath, Sven. "Convective heat and mass transfer in glasshouses." Thesis, University of Exeter, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.391213.

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22

Yapici, Sinan. "Electrochemical mass transfer in annular swirl flow." Thesis, University of Exeter, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.303777.

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23

Hayati, Burhan. "Mass transfer characteristics of adiponitrile multiphase electrosynthesis." Thesis, Teesside University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.385888.

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24

Karabelchtchikova, Olga. "Fundamentals of Mass Transfer in Gas Carburizing." Digital WPI, 2007. https://digitalcommons.wpi.edu/etd-dissertations/424.

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"Gas carburizing is an important heat treatment process used for steel surface hardening of automotive and aerospace components. The quality of the carburized parts is determined by the hardness and the case depth required for a particular application. Despite its worldwide application, the current carburizing process performance faces some challenges in process control and variability. Case depth variability if often encountered in the carburized parts and may present problems with i) manufacturing quality rejections when tight tolerances are imposed or ii) insufficient mechanical properties

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25

Kawesha, David Mukuma. "A mass transfer model for structured packing." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/52647.

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Thesis (MScEng) -- Stellenbosch University , 2002.<br>ENGLISH ABSTRACT: The distillation process is the most widely used separating process in the chemical process industry. The optimal design of the distillation units can lead to reduced capital costs and improved energy utilisation. This is particularly the case for structured packed distillation column where design methods tend to over-predict the column efficiency. This work seeks to contribute to the development of a reliable mass transfer model for structured packing. A gas phase mass transfer correlation was developed based on th

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26

Mielnicki, Adam. "CO2 Mass Transfer in a Novel Photobioreactor." Ohio University / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1313775062.

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27

Al-Faize, Mustafa M. "Mass transfer characteristics of large oscillating drops." Thesis, Aston University, 1986. http://publications.aston.ac.uk/10193/.

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28

Pembery, J. G. A. "Mass transfer modelling of heat transfer in partially blocked nuclear fuel bundles." Thesis, University of Exeter, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.354029.

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29

Gadani, Clarissa. "Experimental and mass transfer modelling in agarose beads." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020.

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The typical drawbacks of chromatographic separations are associated to the inability of affinity columns to handle high volumetric flow rates at reasonable ligand utilisation efficiencies. Membrane-based separation processes can be used in order to overcome these limitations. The ligand immobilization can be realized by deposition of a high capacitive gel on the convective pore walls of the membrane. To understand the optimal coating layer design, the mass transfer can be investigated in conventional resins. This work includes characterization of agarose-based stationary phases and mass tra

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30

Gruber, Rainer. "Radial mass transfer enhancement in bubble train flow." [S.l.] : [s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=964898292.

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31

Kadic, Enes. "Survey of gas-liquid mass transfer in bioreactors." [Ames, Iowa : Iowa State University], 2010. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1476312.

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32

Kilic, Ilker. "Heat And Mass Transfer Problem And Some Applications." Phd thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12614140/index.pdf.

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Numerical solutions of mathematical modelizations of heat and mass transfer in cubical and cylindrical reactors of solar adsorption refrigeration systems are studied. For the resolution of the equations describing the coupling between heat and mass transfer, Bubnov-Galerkin method is used. An exact solution for time dependent heat transfer in cylindrical multilayered annulus is presented. Separation of variables method has been used to investigate the temperature behavior. An analytical double series relation is proposed as a solution for the temperature distribution, and Fourier coefficients

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33

Yang, Hsun-min. "Studies of distillation tray hydrodynamics and mass transfer." Thesis, Imperial College London, 2002. http://hdl.handle.net/10044/1/11960.

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34

Lamarche, Philippe. "Air stripping mass transfer correlations for volatile organics." Thesis, University of Ottawa (Canada), 1986. http://hdl.handle.net/10393/4763.

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35

Feron, Paul H. M. "Hydrodynamics and mass transfer in obstructed narrow channels." Thesis, Cranfield University, 1991. http://dspace.lib.cranfield.ac.uk/handle/1826/3633.

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The objective of this research was to carry out a comprehensive investigation on hydrodynamics and mass transfer of different idealised geometries representing typical conditions which might occur in the narrow cells common in membrane process plant. The method used was to represent these cells by a ten times scale model, adjusting velocity and viscosity to match the Reynolds numbers which might occur in actual membrane equipment, typically between 100 and 1000. The geometries investigated had rods of circular cross-section placed at right angles to the direction of flow: the spacing, position

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36

Jauhari, Ritika. "Gas-solid mass transfer in a rotary drum." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq21176.pdf.

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37

Krothapalli, Deep. "Gas-liquid Mass Transfer in Oxygen Delignification Systems." Fogler Library, University of Maine, 2004. http://www.library.umaine.edu/theses/pdf/KrothapalliD2004.pdf.

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38

Lindblom, Jenny. "Condensation irrigation : simulations of heat and mass transfer." Licentiate thesis, Luleå : Luleå University of technology, 2006. http://epubl.luth.se/1402-1757/2006/08.

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39

Hussain, Arshad. "Heat and mass transfer in tubular inorganic membranes." [S.l.] : [s.n.], 2006. http://diglib.uni-magdeburg.de/Dissertationen/2006/arshussain.htm.

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40

Hall, Charles A. "Kinetics and mass-transfer effects in batch alkoxylations." Thesis, Georgia Institute of Technology, 1987. http://hdl.handle.net/1853/11213.

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41

Lutostansky, Elizabeth McClelland. "The role of convective mass transfer in atherosclerosis." Diss., Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/15933.

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42

Morin, Francois. "Mass transfer limitations in sulfite pulping with anthraquinone." Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=28495.

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The objective of this project was to study systematically the NSSC-AQ pulping process in order to improve the penetration of anthraquinone and sodium sulfite in wood and to simulate the mass transfer and delignification processes.<br>In a heterogeneous reaction system, such as wood pulping, two main factors control the overall reaction rate: liquor penetration and chemical diffusion. As a first step, some wood characteristics affecting liquor impregnation were evaluated: 1) fiber hydraulic radius, 2) air, steam and water content, 3) wood elasticity and compressibility. Secondly, impregnation a

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43

Zhao, Min. "Mass transfer to viscous liquids in bubble columns." Thesis, University of Cambridge, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.315975.

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44

Lund, I. D. "Hydrodynamics and mass transfer problems in wet spinning." Thesis, University of Oxford, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.370283.

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45

Porter, Simon William. "Heat and mass transfer during structured cereal baking." Thesis, University of Bristol, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.505758.

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The majority of modern cereal baking ovens are tunnel ovens with multiple zones, each of which is individually controlled. A baking profile is set by the oven operator, which describes the target temperatures and air velocities in each of the zones along the length of the oven. There may be up to ten zones in modern tunnel ovens; it is thus a complex procedure to generate an optimum profile. A computer numerical model was developed to model the baking process and to make predictions of the biscuit temperature, heat flux and moisture content through the bake.

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46

Galbraith, Graham H. "Heat and mass transfer within porous building materials." Thesis, University of Strathclyde, 1992. http://oleg.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=21508.

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The thermal and structural performance of building elements can be significantly impaired by the presence of excess moisture. At present, designers have available only simplistic steady-state techniques to predict such effects, for example that presented by Glaser in 1959. These simple models recognise moisture transport in vapour form only and do not allow information on material moisture content to be obtained directly. They are also based on the assumption that the material transport properties are independent of the prevailing environmental conditions, whereas they are in fact complex func

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47

Xiang, Yuanyuan. "Mass Transfer Phenomena in Rotating Corrugated Photocatalytic Reactors." Thèse, Université d'Ottawa / University of Ottawa, 2013. http://hdl.handle.net/10393/30342.

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Photocatalysis is a green technology that has been widely used in wastewater treatment. In this work, mass transfer processes in corrugated photocatalytic reactors were characterized both experimentally and through computer simulations. For the experimental work, various drum rotational speeds, reactor liquid volumes and number of corrugations were studied to elucidate their effects on mass transfer phenomena. The mass transfer rate was found to increase with increasing rotational speed. Liquid volumes in the reactor significantly affect the mass transfer rate when 20% of the surface area of t

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48

Aboulhasanzadeh, Bahman. "Multiscale computations of mass transfer in bubbly flows." Thesis, University of Notre Dame, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3583008.

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<p> Mass transfer and reaction in the liquid phase of gas-liquid multiphase flows usually takes place at a considerably slower rate than the transfer of momentum, so mass flux boundary layers are much thinner than momentum boundary layers. In Direct Numerical Simulations (DNS) the resolution requirement for flows with mass transfer are therefore significantly higher than for flow without mass transfer and reaction. In this work we develop a multi-scale approach and demonstrate its implementation in 2D to compute the mass transfer from buoyant bubbles, using a boundary-layer approximation next

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49

Bashir, Skander. "Studies in mass transfer for liquid-liquid systems." Thesis, Teesside University, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.277632.

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50

Khan, Nasar Ahmed. "Modelling and mass transfer studies in continuous crystallisers." Thesis, Teesside University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.410867.

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