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- W2079500077 abstract "The main techniques of studying and designing heterogeneous catalytic processes under forced unsteady-state operation (FUSO) are discussed in this review. Topics included are: a) why FUSOs are theoretically more efficient than conventional steady-state processes?; b) how can a FUSO be devised?; c) reverse-flow operation; d) partial oxidation in a circulating fluidized bed; e) processes that could be attractive under FUSO at a commercial scale, but reasons why this has not been successfully accomplished; f) FUSO systems that have not been used on a commercial scale, such as reaction chromatography, input composition cycling, input temperature cycling, and g) what could be done to encourage use of FUSOs by industry? This review demonstrates the large amounts of data that have been collected on processes proposed for FUSO. Translating these efforts into commercial success becomes possible only when researchers understand thoroughly the fundamentals of the FUSO system they are working on. An overview of past and current research suggests that a catalytic process performed optimally under FUSO will never be less efficient than an optimal steady-state process. On analyse dans ce travail les principales techniques d'étude et de conception des procédés catalytiques hétérogènes dans des conditions de fonctionnement en regime instationnaire forcé (FUSO). Les aspects considérés sont les suivants: a) pourquoi les procédés FUSO sont-ils théoriquement plus efficaces que les procédés en régime permanent classiques?; b) comment un procédé FUSO peut-il ětre conçu?; c) le fonctionnement à écoulement inverse; d) l'oxydation partielle dans un lit fluidisé circulant; e) les procédés qui peuvent ětre intéressants dans des conditions FUSO à l'échelle commerciale, et les raisons pour lesquelles leur emploi ne s'est pas généralisé dans l'industrie; f) les systèmes FUSO non employés à l'échelle commerciale, tels que la chromatographie de réaction, le cyclage des compositions d'entrée, le cyclage des températures d'entrée; g) que pourrait-on faire pour encourager l'utilisation des FUSO dans l'industrie? Cette étude démontre le nombre considérable de données qui ont été recueillies sur les procédés pour un fonctionnement FUSO. Traduire ces efforts en succès commercial devient possible seulement lorsque les chercheurs comprennent parfaitement les principes fondamentaux du système FUSO sur lequel ils travaillent. Un bref examen des recherches passées et actuelles suggère qu'un procédé catalytique fonctionnant de manière optimale en mode FUSO ne sera jamais moins efficace qu'un procédé en régime permanent optimale." @default.
- W2079500077 created "2016-06-24" @default.
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- W2079500077 date "1996-10-01" @default.
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- W2079500077 title "Forced unsteady-state processes in heterogeneous catalytic reactors" @default.
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- W2079500077 doi "https://doi.org/10.1002/cjce.5450740504" @default.
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