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|Title:||Carbon nanotubes supported palladium catalysts for selective hydrogenation of cinnamaldehyde under atmospheric pressure|
|Series/Report no.:||Int. Cl.9 B0IJ23/44; C07B35/00|
|Abstract:||Carbon nanotubes supported Pd catalysts have been prepared by an impregnation method with aqueous solution containing a Pd(II) salt. The selective hydrogenation of cinnamaldehyde with the catalysts is studied in ethanol at 30 <sup>o</sup>C under atmospheric pressure. A comparison has been made with activated carbon and graphite supported Pd catalysts. The results show that all the Pd/CNTs catalysts prepared with different Pd precursors exhibit good catalytic properties. The Pd/CNTs(a) catalyst prepared with Pd(NH<sub>3</sub>)<sub>4</sub>Cl<sub>2</sub> as Pd precursor shows remarkably high selectivity (90.8%) for the conversion of cinnamaldehyde (92.0%) with 18.1 mmol H<sub>2</sub> g<sup>-1</sup> min<sup>-1</sup> hydrogenation rate. The influence of the solvent polarity and promoter has been investigated. The results demonstrate that highly polar solvent is advantageous for catalytic activity of Pd/CNTs(a) catalyst, while traces of weak base is advantageous for selective hydrogenation of C=C double bond.<b></b>|
|Appears in Collections:||IJC-A Vol.49A(03) [March 2010]|
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