On the Importance of Benchmarking the Gas-Phase Pyrolysis Reaction in the Oxidative Dehydrogenation of Propane
Abstract
The oxidative dehydrogenation of propane (ODP) proceeds catalytically on a gas-solid interface (heterogeneous reaction) and/or in the gas phase (homogeneous reaction) via a radical chain process. ODP may therefore combine interrelated contributions from the heterogeneous dehydrogenation and gas-phase reactions, which can be initiated by a catalyst. This study demonstrates that relatively high propene and ethene selectivities (ca. 80 % and 10 %) and propane conversions (viz., 10 % at 500 degrees C) can be achieved with an empty quartz reactor, which is comparable to the performances of state-of-the-art ODP catalysts (boron-based or supported VOx). Optimization of the post-catalytic volume of a h-BN catalyst bed tested at 490 degrees C allows to increase the conversion of propane from 9 % to 15 % at a propene selectivity of 77 %, highlighting this parameter as an important variable for improving catalytic ODP performances. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000609685Publication status
publishedExternal links
Journal / series
ChemCatChemVolume
Pages / Article No.
Publisher
Wiley-VCHSubject
heterogeneous-homogeneous reactions; hexagonal boron nitride; oxidative dehydrogenation of propane; oxidative pyrolysis of propane; surface-initiated gas-phase reactionOrganisational unit
03865 - Müller, Christoph R. / Müller, Christoph R.
Funding
180544 - NCCR Catalysis (phase I) (SNF)
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