Study
of the temperature-programmed oxidative degradation of hydrocarbons over Ce-based
catalysts by evolved gas analysis |
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| Authors: | J I Gutiérrez-Ortiz Beatriz de
Rivas R López-Fonseca J R González-Velasco |
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| Institution: | (1) Chemical Technologies for Environmental Sustainability Group, Department of Chemical Engineering, Faculty of Science and Technology, Universidad del País Vasco/EHU, Bilbao, Spain, P.O. Box 644, 48080 |
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| Abstract: | The catalytic behaviour of ceria, zirconia
and ceria–zirconia mixed oxides in the temperature-programmed degradation
of toluene and n-hexane was analysed by
means of evolved gas analysis (mass spectrometry). Pure cerium oxide resulted
the most active catalyst in the oxidation of both compounds. This fact revealed
the crucial role of the surface oxygen species in the decomposition of this
type of hydrocarbons. The low affinity of CeO2 for
H2O and CO2, the major oxidation
products, may be also responsible for the observed highly active catalytic
behaviour. |
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| Keywords: | ceria– zirconia mixed oxides evolved gas analysis n-hexane temperature-programmed oxidative degradation toluene |
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