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Active coke: Carbonaceous materials as catalysts for alkane dehydrogenation

MPS-Authors
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Hansen,  Thomas W.
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons22164

Tessonnier,  Jean-Philippe
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons22148

Su,  Dang Sheng
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons22163

Teschner,  Detre
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons22195

Vass,  Elaine M.
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons21743

Knop-Gericke,  Axel
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

/persons/resource/persons22071

Schlögl,  Robert
Inorganic Chemistry, Fritz Haber Institute, Max Planck Society;

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Citation

McGregor, J., Huang, Z., Parrott, E. P. J., Zeitler, J. A., Nguyen, K. L., Rawson, J. M., et al. (2010). Active coke: Carbonaceous materials as catalysts for alkane dehydrogenation. Journal of Catalysis, 269(2), 329-339. doi:10.1016/j.jcat.2009.11.016.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0010-F659-0
Abstract
The catalytic dehydrogenation (DH) and oxidative dehydrogenation (ODH) of light alkanes are of significant industrial importance. In this work both carbonaceous materials 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.