Active coke: Carbonaceous materials as catalysts for alkane dehydrogenation

被引：74

作者：

McGregor, James ^{[1
]}

Huang, Zhenyu ^{[1
]}

Parrott, Edward P. J. ^{[1
,2
]}

Zeitler, J. Axel ^{[1
]}

Nguyen, K. Lien ^{[1
]}

Rawson, Jeremy M. ^{[3
]}

Carley, Albert ^{[4
]}

Hansen, Thomas W. ^{[5
]}

Tessonnier, Jean-Philippe ^{[5
]}

Su, Dang Sheng ^{[5
]}

Teschner, Detre ^{[5
]}

Vass, Elaine M. ^{[5
]}

Knop-Gericke, Axel ^{[5
]}

Schloegl, R. ^{[5
]}

Gladden, Lynn F. ^{[1
]}

机构：

[1] Univ Cambridge, Dept Chem Engn & Biotechnol, Cambridge CB2 3RA, England

[2] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England

[3] Univ Cambridge, Dept Chem, Cambridge CB2 1EW, England

[4] Cardiff Univ, Sch Chem, Cardiff CF10 3AT, S Glam, Wales

[5] Max Planck Gesell, Fritz Haber Inst, D-14195 Berlin, Germany

来源：

JOURNAL OF CATALYSIS | 2010年 / 269卷 / 02期

基金：

英国工程与自然科学研究理事会;

关键词：

Vanadia catalysts; Carbon nanofibres; THz time domain spectroscopy; Coke; Transmission electron microscopy; Butane dehydrogenation; X-ray absorption spectroscopy; VANADIUM-OXIDE CATALYSTS; SITU RAMAN-SPECTROSCOPY; OXIDATIVE DEHYDROGENATION; HETEROGENEOUS CATALYSIS; V/THETA-AL2O3; CATALYSTS; TERAHERTZ SPECTROSCOPY; BUTANE DEHYDROGENATION; ALKYNE HYDROGENATION; N-BUTANE; ETHYLBENZENE;

D O I：

10.1016/j.jcat.2009.11.016

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The catalytic dehydrogenation (DH) and oxidative dehydrogenation (ODH) of light alkanes are of significant industrial importance. In this work both carbonaceous material deposited on VO(x)/Al(2)O(3) 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 VO(x) 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. (C) 2009 Elsevier Inc. All rights reserved.

引用

页码：329 / 339

页数：11

共 68 条

[1] Kinetic modeling of dehydrogenation of isobutane on chromia/alumina catalyst [J].