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- W2095364193 abstract "A zeolite catalyst became rapidly fouled when used for the alkylation of benzene by cyclohexene at temperatures below 245°C. At higher temperatures, the extent of fouling was limited and at 450° C, a steady rate of formation of cyclohexyl benzene was observed. The fouling material was identified as a mixture of di- and tri-alkyl benzene, trapped because of size in the void spaces of the zeolite crystal. A mathematical model based on the forms of Langmuir-Hinshelwood kinetics was used to describe the fouling phenomenon. The effect of the internal mass transport has also been investigated by means of a mathematical model. This model indicates that transport between the surface of the zeolite crystal and interior reaction sites is rapidly blocked by a layer of fouling material. Un catalyseur à base de zéolite est devenu rapidement impropre à l'usage lorsqu'on l'a employé pour l'alcoylation du benzène par le cyclohexène à des températures inférieures à 245° C; à des températures supérieures, le degré d'encrassement du catalyseur s'est avéré limité et, à 450°C, on a observé la formation à vitesse régulière de cyclohexyl-benzène. On a trouvé que l'encrassement était causé par un mélange de dialcoylbenzène et trialcoylbenzène qui étaient emprisonnés par suite de leurs dimensions dans les espaces vides du cristal de zéolite. On a utilisé un modèle mathématique base sur les formes de cinétique de Langmuir et Hinshelwood pour décrire le phénomène d'encrassement du catalyseur. On a aussi étudié, au moyen d'une modèle mathématique, l'effet du déplacement interne de masse; ce modèle indique que le déplacement entre la surface du cristal de zéolite et les points intérieurs de réaction est bloqué rapidement par une couche d'impuretés." @default.
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- W2095364193 date "1970-04-01" @default.
- W2095364193 modified "2023-09-27" @default.
- W2095364193 title "A model fouling reaction in a zeolite catalyst" @default.
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- W2095364193 doi "https://doi.org/10.1002/cjce.5450480214" @default.
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