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High-performance Cr–Zr–O and Cr–Zr–K–O catalysts prepared by nanocasting for dehydrogenation of propane to propene

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Abstract

Ordered mesoporous Cr–Zr–O and Cr–Zr–K–O catalysts were prepared by nanocasting using a CMK-3 carbon replica as a hard template. The synthesized oxide nanoreplicas had a uniform pore-size distribution centered in the range of 5.5–6.5 nm and specific surface areas of 123–164 m2 g−1. Results of physicochemical characterization (UV-vis DRS, EPR, XRD, XPS and H2-TPR) revealed that chromium species were stabilized in +3, +5 and +6 oxidation states in all samples. The developed materials exhibited excellent catalytic performance and much higher resistance to deactivation during the process of dehydrogenation of propane to propene in comparison with a material prepared without the CMK-3 hard template assistance. Potassium doping (0.2, 0.5 or 1.0 wt%) of the catalyst with a Zr/Cr atomic ratio of 5 enhanced the selectivity to propene and resistance to coke deposition.

Graphical abstract: High-performance Cr–Zr–O and Cr–Zr–K–O catalysts prepared by nanocasting for dehydrogenation of propane to propene

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Publication details

The article was received on 25 Aug 2017, accepted on 07 Nov 2017 and first published on 08 Nov 2017


Article type: Paper
DOI: 10.1039/C7CY01744H
Citation: Catal. Sci. Technol., 2017, Advance Article
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    High-performance Cr–Zr–O and Cr–Zr–K–O catalysts prepared by nanocasting for dehydrogenation of propane to propene

    A. Węgrzyniak, A. Rokicińska, E. Hędrzak, B. Michorczyk, K. Zeńczak-Tomera, P. Kuśtrowski and P. Michorczyk, Catal. Sci. Technol., 2017, Advance Article , DOI: 10.1039/C7CY01744H

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