Carbon Aerogel-Supported Pt Catalysts for the Hydrogenolysis and Isomerization of n-Butane: Influence of the Carbonization Temperature of the Support and Pt Particle Size
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MDPI
Materia
Carbon aerogels Pt catalysts N-butane hydrogenolysis
Date
2012-10-12Referencia bibliográfica
Moreno Castilla, C. & Carrasco Marín, F. & Dawidziuk, M.B. Catalysts 2012, 2, 422-433. [https://doi.org/10.3390/catal2040422]
Sponsorship
MICINN and FEDER, project CTM2010-18889Abstract
Carbon aerogels prepared at different carbonization temperatures and with
varying mesopore volumes were used as supports for Pt catalysts to study the n-C4H10/H2
reaction. Mean Pt particle size depended on the mesopore volume of the support, showing
a linear decrease when the mesopore volume increased. The turnover frequency (TOF) for
hydrogenolysis was much higher than for isomerization in catalysts supported on carbon
aerogels obtained at 900–950 °C. However, both TOF values were similar in catalysts
supported on the carbon aerogel obtained at 500 °C. TOF for hydrogenolysis and
isomerization were related to the mean Pt particle size in catalysts supported on carbon
aerogels obtained at 900–950 °C. In addition, both reactions showed a compensation effect
between the activation energy and pre-exponential factor, indicating that they have the
same intermediate, i.e., the chemisorbed dehydrogenated alkane.