II International Symposium on Carbon for Catalysis ABSTRACTS

OP-I-18
HIGHLY ORDERED MESOPOROUS CARBON MATERIALS FOR OXIDATIVE
DEHYDROGENATION OF ETHYLBENZENE
Su D.Sh., Delgado J.J., Wang L.F. 1 , Xiao F.Sh. 1
Department of Inorganic Chemistry, Fritz Haber Institute of the Max Planck Society,
Faraday 4-6, D-14195 Berlin, Germany
1 State Key Laboratory of Inorganic Synthesis and Preparative Chemistry & College of
Chemistry, Jilin University, Changchun 130012, China
e-mail: dangsheng@fhi-berlin.mpg.de
Synthesis of ordered mesoporous carbon materials with various structures (for instance CMK-
1-5) has achievd great progress. Such carbon materials are usually synthesized by
carbonization of sucrose, furfuryl alcohol or other suitable carbon sources inside silica or
aluminosilicate mesopores that are interconnected into three-dimensional networks. The
extremely high surface areas and controllable pore sizes of the ordered mesoporous carbons
with large pore volumes make it to a promising candidate for applications in many fields of
science and technology, such as storage of hydrogen and methane, super capacitor. The
ordered carbon meosmaterials with three-dimensionaly (3-D) pore arrangements, or
preferably, with 3-D interconnected pores and atomic orders similar to those in zeolites can be
candidate as high performance catalyst for gas phase reaction. Here we report on the catalytic
performance of highly ordered carbon materials in oxidative dehydrogenation (ODH) of ethy
benzene to styrene with very promising results.
Sucrose was used as carbon source and SBA-15 as template for the synthesis. Figure 1A
shows X-ray diffraction (XRD) patterns of mesoporous carbon. The well-resolved peaks at
1.01° and two week peaks at 1.75° and 2.0° indicte the highly ordered hexagonal mesoporous
symmetry of the sample replicated from SBA 15 template. The nitrogen adsorptiondesorption
isotherm in figure 1B reveals that the sample exhibits typical IV isotherms with
hysteresis loops, and the isotherm shows capillary condensation at medium relative pressures,
indicating the existence of mesopores. Figure 2 displays the catalytic propertied of the
investigated carbon materials with time on steam t. The ordered mesoporous carbon is highly
active as catalyst in this reaction. After a short induction time a selectivity of EB to SB of
70 % is achieved at a convention rate of 68%. The high activity at the beginning of the
reaction is accompanied by slight lower slectivity, but both tend to stable after 5 hours
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