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Highly dispersed Pd catalyst for anthraquinone hydrogenation supported on alumina derived from a pseudoboehmite precursor

Paper ID Volume ID Publish Year Pages File Format Full-Text
40182 45845 2014 8 PDF Available
Title
Highly dispersed Pd catalyst for anthraquinone hydrogenation supported on alumina derived from a pseudoboehmite precursor
Abstract

•Pseudoboehmite was prepared using the Separate Nucleation and Aging Steps method.•Alumina prepared using pseudoboehmite as precursor shows better pore structure.•The Pd/Al2O3(PB) catalyst displays high Pd dispersion and small Pd size.•The Pd/Al2O3(PB) catalyst has better activity and selectivity than Pd/Al2O3(OD).

Pseudoboehmite was synthesized using the separate nucleation and aging steps (SNAS) method for the first time. An alumina support (Al2O3(PB)) was then prepared by extrusion method using the synthesized pseudoboehmite as precursor. Compared with spherical alumina (Al2O3(OD)) prepared by the conventional oil-drop method, Al2O3(PB) exhibits higher surface area, more regular pore structure and narrower pore size distribution. Al2O3(PB) and Al2O3(OD) were used as supports to prepare Pd catalysts. The catalytic performance of the two Pd catalysts was investigated in the catalytic hydrogenation of 2-ethylanthraquinone (EAQ) to 2-ethylanthrahydroquinone, a key step in the anthraquinone process for the manufacture of hydrogen peroxide. Compared with Pd/Al2O3(OD) catalyst, Pd/Al2O3(PB) catalyst showed higher Pd dispersion and thinner Pd penetration depth which resulted in more catalytically active site and easier diffusion of the reactants, and consequently Pd/Al2O3(PB) catalyst exhibited higher anthraquinone hydrogenation activity and better selectivity.

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Keywords
Pseudoboehmite; Separate nucleation and aging steps; Alumina; Pd catalysts; Anthraquinone process
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Highly dispersed Pd catalyst for anthraquinone hydrogenation supported on alumina derived from a pseudoboehmite precursor
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 469, 17 January 2014, Pages 312–319
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