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A comparative study of the WOx dispersion on Mn-promoted tungstated zirconia catalysts prepared by conventional and high-throughput experimentation

Paper ID Volume ID Publish Year Pages File Format Full-Text
43701 45983 2008 8 PDF Available
Title
A comparative study of the WOx dispersion on Mn-promoted tungstated zirconia catalysts prepared by conventional and high-throughput experimentation
Abstract

Conventional and high-throughput experimentation (HTE) techniques were used for the synthesis, characterization, and catalytic testing of Pt/Mn–WOx–ZrO2 materials. The catalysts were prepared by surfactant-assisted coprecipitation and screened for catalytic activity in a multi-channel fixed bed (MCFB) micro-reactor for the hydroisomerization of n-hexane. Conventional coprecipitation route leads mainly to the segregation of the WO3 crystalline phase (XRD). On the other hand, the use of the automated HTE route allows the formation of catalysts with a highly dispersed WOx phase on the zirconia surface and a high surface area (60–100 m2/g) when calcined at 800 °C (N2 physisorption, XRD, Raman, UV–vis, HRTEM). These polytungstates with different coordination symmetry are accessible to the reactants and they lead to an increase in the catalytic activity and selectivity to the bi-ramified products (2,2-DMB and 2,3-DMB) in the n-hexane isomerization. In addition, it was found that the incorporation of Mn modifies the nanostructural properties of the tungstated zirconia favoring the catalytic activity of these materials.

Graphical abstractConventional and high-throughput experimentation techniques were used to investigate the catalytic behavior of Pt/WOx–ZrO2 catalysts modified with Mn in the hydroisomerization of n-hexane. The use of the automated HTE route allows the formation of highly dispersed WOx catalysts with high surface area. These polytungstates increase the catalytic activity and selectivity. The incorporation of Mn also promotes the catalytic activity.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
High-throughput experimentation; Tungstated zirconia; Surfactant; Tungsten surface density; n-Hexane hydroisomerization
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A comparative study of the WOx dispersion on Mn-promoted tungstated zirconia catalysts prepared by conventional and high-throughput experimentation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 345, Issue 2, 1 August 2008, Pages 233–240
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