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          Institute: Fritz-Haber-Institut     Collection: Inorganic Chemistry     Display Documents

ID: 443398.0, Fritz-Haber-Institut / Inorganic Chemistry
Active coke: Carbonaceous materials as catalysts for alkane dehydrogenation
Authors:McGregor, James; Huang, Zhenyu; Parrott, Edward P. J.; Zeitler, J. Axel; Nguyen, K. Lien; Rawson, Jeremy M.; Carley, Albert; Hansen, Thomas W.; Tessonnier, Jean-Philippe; Su, Dang Sheng; Teschner, Detre; Vass, Elaine M.; Knop-Gericke, Axel; Schlögl, Robert; Gladden, Lynn F.
Date of Publication (YYYY-MM-DD):2010-02-05
Title of Journal:Journal of Catalysis
Journal Abbrev.:J. Catal.
Issue / Number:2
Start Page:329
End Page:339
Copyright:Copyright © 2009 Elsevier Inc. All rights reserved.
Review Status:Peer-review
Audience:Experts Only
Abstract / Description: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.
Free Keywords:Vanadia catalysts; Carbon nanofibres; THz time domain spectroscopy; Coke; Transmission electron microscopy; Butane dehydrogenation; X-ray absorption spectroscopy
Research Context: Carbon
External Publication Status:published
Document Type:Article
Communicated by:Robert Schlögl
Affiliations:Fritz-Haber-Institut/Inorganic Chemistry/Micro- and Nanostructure / Carbon
Fritz-Haber-Institut/Inorganic Chemistry/Inorganic Chemistry
External Affiliations:University of Cambridge, Department of Chemical Engineering and Biotechnology, Cambridge CB2 3RA, UK
University of Cambridge, Cavendish Laboratory, Cambridge CB3 0HE, UK
University of Cambridge, Department of Chemistry, Cambridge CB2 1EW, UK
Cardiff University, School of Chemistry, Cardiff CF10 3AT, UK
Identifiers:URL:http://dx.doi.org/10.1016/j.jcat.2009.11.016 [only for subscriber]
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