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Kinetics of dehydrogenation of n-octane on a promoted Pt-catalyst

Title data

Prucker, Tobias ; Lamberty, Aliena ; Thiessen, Johannes ; König, Matthias ; Jess, Andreas:
Kinetics of dehydrogenation of n-octane on a promoted Pt-catalyst.
In: Chemical Engineering Journal. Vol. 442 (2022) Issue 2 . - No. 136233.
ISSN 1385-8947
DOI: https://doi.org/10.1016/j.cej.2022.136233

Official URL: Volltext

Abstract in another language

In contrast to short as well as long chain paraffin dehydrogenation, the highly desirable reaction of intermediate chain length paraffins (C6 - C9) to the corresponding linear monoolefins receives only little attention in the literature. Consequently, the dehydrogenation of the model substance n-octane on promoted platinum catalysts was studied thoroughly. In the first instance, the effect of the addition of different promotors (Sn, K, Ce) on the catalytic performance with emphasis on activity and octene selectivity was tested by screening of 16 differently promoted Pt-catalysts. The optimized and non-deactivated catalyst was then used to investigate the kinetics of n-octane dehydrogenation including the unwanted consecutive formation of n-octadienes and C8-aromatics. The analysis revealed that the desired n-octenes are rapidly converted to n-octadienes, i.e. the thermodynamic equilibrium of this reversible reaction is quickly established. To a small extent, the n-octadienes are further converted to C8-aromatics. A kinetic model was developed, which also considers the inhibiting effect of n-octenes on the rate of n-octane conversion. The model accurately predicts the formation of mono- and diolefins as well as of aromatics in the initial reaction phase in the absence of deactivation.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Dehydrogenation; Intermediate chain paraffin; Olefins; Modified Pt-catalyst; Kinetic modeling
Institutions of the University: Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Chemical Engineering
Faculties > Faculty of Engineering Science > Chair Chemical Engineering > Chair Chemical Engineering - Univ.-Prof. Dr.-Ing. Andreas Jess
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
600 Technology, medicine, applied sciences > 600 Technology
600 Technology, medicine, applied sciences > 620 Engineering
600 Technology, medicine, applied sciences > 660 Chemical engineering
Date Deposited: 19 Apr 2022 09:20
Last Modified: 19 Apr 2022 09:20
URI: https://eref.uni-bayreuth.de/id/eprint/69225