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Catalytic hydrogenation of ethylanthraquinone over highly dispersed eggshell Pd/SiO2–Al2O3 spherical catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
42089 45910 2010 6 PDF Available
Title
Catalytic hydrogenation of ethylanthraquinone over highly dispersed eggshell Pd/SiO2–Al2O3 spherical catalysts
Abstract

Spherical Al2O3 and SiO2–Al2O3 supports with different silica contents have been synthesized by the oil column method. After impregnation with Na2PdCl4 solution and subsequent calcination, PdO/Al2O3 and PdO/SiO2–Al2O3 catalyst precursors were obtained. X-ray powder diffraction and low temperature N2 adsorption–desorption measurements showed that the addition of silica increased the thermal stability, surface acidity, specific surface area and total pore volume of the spherical alumina. Temperature programmed reduction and H2–O2 titration indicated that Pd supported on the SiO2–Al2O3 spheres possessed higher dispersion and smaller particle size than that supported on pristine spherical Al2O3. Catalytic hydrogenation of ethylanthraquinone using molecular hydrogen was studied over the reduced Pd/Al2O3 and Pd/SiO2–Al2O3 catalysts with different silica contents. Under identical reaction conditions, the reaction activity and stability increased with increasing silica content.

Graphical abstractSpherical SiO2–Al2O3 supports with different silica contents have been synthesized. After impregnation and calcination, PdO/SiO2–Al2O3 catalyst precursors were obtained. The addition of silica increased the thermal stability, surface acidity, specific surface area and total pore volume of the alumina. The activity and stability of ethylanthraquinone hydrogenation over the reduced Pd/SiO2–Al2O3 catalysts increased with increasing silica content.Figure optionsDownload full-size imageDownload high-quality image (78 K)Download as PowerPoint slide

Keywords
Hydrogen peroxide; Ethylanthraquinone; Eggshell palladium catalyst; High dispersion
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Catalytic hydrogenation of ethylanthraquinone over highly dispersed eggshell Pd/SiO2–Al2O3 spherical catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 382, Issue 2, 15 July 2010, Pages 240–245
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us