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The intraparticle deactivation of NiSiO2Al2O3 by thiophene in benzene hydrogenation

✍ Scribed by S. Zrnc̆ević

Publisher
Elsevier Science
Year
1984
Tongue
English
Weight
403 KB
Volume
39
Category
Article
ISSN
0009-2509

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✦ Synopsis

A-act-The deactivation of the commercial NCSiO,-A&O, catalyst was studied in an isothermal differential flow reactor using the hydrogenation of benzene to cyclohexane as a model reaction. Reaction system behaviour in both the presence and absence of diffusional limits is studied at temperatures ranging from 388 to 476 K and atmospheric pressure.

The results indicate that higher mass transfer resistance increase the life time of the pellets, while lower mass transfer increase the effectiveness factor. The combined effects of these opposing factors result in an optimum value of the Thiele modulus for which the desired reaction rate is maximum for a given period of cktinuous operation.

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