Mathematical Modeling of Chemical Reactors—Development and Implementation of Novel Technologies

Matros, Yuri Shaevich

doi:10.1002/anie.199012351

Cited by 10 publications

(2 citation statements)

References 23 publications

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“…So, inhomogeneity is not only an issue for reactor operation on large scales but it should also be considered in fundamental research, see also the paper of Matros. [166] For homogeneous polymerization conditions the situation is much more advanced than for heterophase polymerizations. In the latter case the transfer of matter between the phases contributes to additional complications.…”

Section: Discussionmentioning

confidence: 99%

Molecular Aspects of Radical Polymerizations—The Propagation Frequency

Tauer

Hernández

2010

Macromol. Rapid Commun.

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The product of the propagation rate constant and monomer concentration is a central issue of radical polymerization. Both quantities are strongly interrelated as the determination of a reliable value of the propagation rate constant requires exact knowledge of the monomer concentration. Even for homogeneous polymerization conditions, exact knowledge of the monomer concentration at the reaction site from the molecular perspective is not trivial. For emulsion polymerizations the situation is additionally complicated by mass transfer events and colloid-chemical effects. Molecular modeling appears as an attractive alternative or complement to the deterministic kinetic description of radical polymerizations.

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Section: Discussionmentioning

confidence: 99%

Molecular Aspects of Radical Polymerizations—The Propagation Frequency

Tauer

Hernández

2010

Macromol. Rapid Commun.

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“…The maximum temperature in the PSS remains constant and the heat of the reaction is removed by an increase in the temperature of the reactor outlet stream. The many benefits of operating a reactor under unsteadystate conditions have been summarized by Matros (1990). For the air purification process in particular, we can mention that an autothermal process is possible with very low concentrations of the contaminants and that the reactor can handle large fluctuations in inlet conditions of flow rate and concentration.…”

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Operation of a catalytic reverse flow reactor for the purification of air contaminated with volatile organic compounds

Beld

Westerterp

1997

Can J Chem Eng

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Catalytic oxidation in a reverse flow reactor is an attractive process for the decontamination of air polluted with volatile organic compounds (VOCs). In this paper several aspects of operating this type of reactor for air purification under strongly varying conditions will be discussed.For a successfit operation of such reactor a minimum amount of combustibles is required, and a simple theory is developed to predict this minimum value. This minimum amount is strongly influenced by the reaction kinetics, the heat transport in the packed bed and the adiabaticity of the reactor. To cope with a too low temperature level in the reactor for a complete conversion, an electrical heating device should be installed in the centre of the reactor bed to increase locally the temperature rapidly and efficiently. To control the maximum temperature in case of too high concentrations, extra air should be added to the feed. L'oxydation catalytique dans un reacteur a ecoulement inverse est un procede inteessant pour la decontamination de I'air pollue par des composes organiques volatils (VOC). Dans cet article, plusieurs aspects du fonctionnement de ce type de reacteur pour la purification de I'air dans des conditions extr6mement variables seront analyses.Pour le bon fonctionnement d'un tel reacteur, un apport minimum en combustible est necessaire, et une theorie simple a ete etablie afin de predire cette valeur minimum. Cet apport minimum est fortement influence par la cinetique de la reaction, le transfert de chaleur dans le lit gami et I'adiabicite du reacteur. Pour eviter d'avoir une temperature trop basse dans le reacteur en vue d'une conversion complete, un dispositif de chauffage electrique doit 6tre installe au centre du lit du reacteur afin d'augmenter localement la temperature de faqon rapide et efficace. Pour contrder la temperature maximum en cas de concentrations trop fortes, de l'air doit 6tre ajoute a I'alimentation.Keywords: catalytic combustion, reverse flow operation, air purification. xhaust air from laboratories or factory buildings can be E contaminated with volatile organic compounds (VOCs).In order to reduce the emission of VOCs, a large number of methods are available. The economically most attractive method depends on the specific conditions in each case, including the concentration and nature of the contaminants and the flow rate. Moreover, the polluted air stream might show strong variations in flow rate as well as in concentration and chemical character of the pollutants. In the case of valuable contaminants, separation methods with recovery of the organic compounds might be considered. Examples in this area are membrane separation and pressure swing adsorption. These methods have in common that the contaminants are concentrated in the first step of the process. The second step is the recovery of the contaminants. Another group of purification methods is composed of destructive processes like thermal and catalytic combustion, which are non-selective. Many modifications or combinations are possible, as fo...

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Wendepunkte der Katalyse

Thomas

1994

Angewandte Chemie

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Diese persönliche Reise durch die immer weiter erschlossene Landschaft der reinen und angewandten Katalyse beginnt mit einer Entdeckung aus dem Jahre 1823; damals wurde eine schon dramatisch zu nennende Form der Wassersynthese gefunden, die die Grundlage für die erste kommerzielle Anwendung der Katalyse bildete, das Döbereiner‐Feuerzeug. Die in zunehmendem Tempo gemachten industriellen Innovationen und akademischen Fortschritte in den 170 seither vergangenen Jahren werden beschrieben und viele große und kleine Wendepunkte in dieser Entwicklung aufgezeigt. Neue Ideen und Konzepte entstanden in Hülle und Fülle, doch bewiesen nur wenige die Langlebigkeit, die von ihren Verfechtern vorhergesagt wurde. Einige Konzepte haben heute, wie zerbrochene Meilensteine an einer verlassenen Straße, keine Bedeutung mehr, einige haben überlebt und sind erfolgreich. Aber ebenso wie andere Bereiche der Naturwissenschaften wird auch die Katalyse nicht von neuen Konzepten, sondern von neuen Techniken und Methoden beherrscht. Und ebenso wie experimentelle Fortschritte in der Enzymologie und der Immunologie zur Entwicklung neuer Biokatalysatoren geführt haben, haben die Methoden und Techniken der Festkörperchemie ‐ dar‐unter auch neue präparative Methoden und Rechenverfahren ‐ viele wirkungsvolle, gezielt konzipierte, anorganische Katalysatoren hervorgebracht, wenn auch noch nicht mit demselben Maß an Feinkontrolle.

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Mathematical Modeling of Chemical Reactors—Development and Implementation of Novel Technologies

Cited by 10 publications

References 23 publications

Molecular Aspects of Radical Polymerizations—The Propagation Frequency

Molecular Aspects of Radical Polymerizations—The Propagation Frequency

Operation of a catalytic reverse flow reactor for the purification of air contaminated with volatile organic compounds

Wendepunkte der Katalyse

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