کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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62020 | 47617 | 2010 | 11 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Active coke: Carbonaceous materials as catalysts for alkane dehydrogenation Active coke: Carbonaceous materials as catalysts for alkane dehydrogenation](/preview/png/62020.png)
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.
Carbonaceous material deposited on VOx/Al2O3 is shown to provide the catalytically active sites for n-butane dehydrogenation at 973 K. The activity of carbon is confirmed through studies on carbon nanofibres.Figure optionsDownload high-quality image (85 K)Download as PowerPoint slide
Journal: Journal of Catalysis - Volume 269, Issue 2, 5 February 2010, Pages 329–339