Active coke: Carbonaceous materials as catalysts for alkane dehydrogenation

McGregor, James, Huang, Zhenyu, Parrott, Edward P.J., Zeitler, J. Axel, Nguyen, K. Lien, Rawson, Jeremy M., Carley, Albert Frederick, Hansen, Thomas W., Tessonnier, Jean-Philippe and Su, Dang Sheng 2010. Active coke: Carbonaceous materials as catalysts for alkane dehydrogenation. Journal of Catalysis 269 (2) , pp. 329-339. 10.1016/j.jcat.2009.11.016

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Abstract

The catalytic dehydrogenation (DH) and oxidative dehydrogenation (ODH) of light alkanes are of significant industrial importance. In this work both carbonaceous material deposited on VOx/Al2O3 catalysts during reaction and unsupported carbon nanofibres (CNFs) are shown to be active for the dehydrogenation of butane in the absence of gas-phase oxygen. Their activity in these reactions is shown to be dependent upon their structure, with different reaction temperatures yielding structurally different coke deposits. Terahertz time-domain spectroscopy (THz-TDS), among other techniques, has been applied to the characterisation of these deposits – the first time this technique has been employed in coke studies. TEM and other techniques show that coke encapsulates the catalyst, preventing access to VOx sites, without a loss of activity. Studies on CNFs confirm that carbonaceous materials act as catalysts in this reaction. Carbon-based catalysts represent an important new class of potential catalysts for DH and ODH reactions.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Chemistry Cardiff Catalysis Institute (CCI)
Subjects:	Q Science > QD Chemistry
Uncontrolled Keywords:	Vanadia catalysts; Carbon nanofibres; THz time domain spectroscopy; Coke; Transmission electron microscopy; Butane dehydrogenation; X-ray absorption spectroscopy
Publisher:	Elsevier
ISSN:	0021-9517
Last Modified:	03 Feb 2022 11:56
URI:	https://orca.cardiff.ac.uk/id/eprint/14439

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