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Microfibrous entrapped catalysts for low temperature CO oxidation in humid air

Paper ID Volume ID Publish Year Pages File Format Full-Text
49958 46775 2012 4 PDF Available
Title
Microfibrous entrapped catalysts for low temperature CO oxidation in humid air
Abstract

CO oxidation on Pt-CeO2/SiO2 catalyst was found to be diffusion controlled at ambient conditions (T < 50 °C; RH: 10–90%), so the use of small particles was imperative to optimize Pt utilization. Packed beds (PBs) of small particles cause channeled flow, axial dispersion due to cluster formation and they are susceptible to vibrations and changes in orientation. Nickel microfibers (4–8 μm) entrapped catalysts (MFECs) were developed to avoid these problems with PBs. These MFECs improved heat transfer within the reactor and minimized flow maldistribution thereby improving the activity. MFECs outperformed the PBs over a wide range of CO concentrations exhibiting greater stability and performance (CO conv. > 99% for > 10 hrs).

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Impact of internal diffusion limitation on Pt-CeO2/SiO2 catalyst activity was studied. ► Entrapment of catalysts in Ni fibers resulted in greater activity for CO Oxidation at ambient conditions. ► Impact of heat and mass transport properties on catalyst performance was investigated. ► Stability of Ni microfibers entrapped catalysts was studied.

Keywords
CO oxidation; Pt; Ceria; Entrapment; Metal fibers; Catalyst
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 27, 5 October 2012, Pages 9–12
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