Journal
CATALYSIS COMMUNICATIONS
Volume 12, Issue 6, Pages 441-445Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.catcom.2010.11.002
Keywords
Carbon xerogels; Nanostructured materials; Diffusional limitations; Catalytic oxidation; Pore texture
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Funding
- National Fund for Scientific Research, Belgium (FRS-FNRS)
- Belgian State-Belgian Science Policy [P6/17]
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Nanostructured carbon xerogels with controlled pore texture are used as catalyst support for the oxidation in aqueous phase of D-glucose into D-gluconic acid on Pd-Bi/C catalysts. X-ray photoelectron spectroscopy shows that metal active sites are not homogeneously dispersed in the spherical support particle but are concentrated in an external spherical layer. The influence of mass transfers on reaction kinetics is highlighted. Internal diffusional limitations are quantified using the Weisz modulus. It is shown that measuring the true kinetic reaction rate implies to choose the experimental conditions within a small range of values. (C) 2010 Elsevier B.V. All rights reserved.
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