fulltext.study @t Gmail

CrOx/nano-Ce0.60Zr0.35Y0.05O2 catalysts that are highly selective for the oxidative dehydrogenation of isobutane to isobutene

Paper ID Volume ID Publish Year Pages File Format Full-Text
42482 45927 2010 7 PDF Available
Title
CrOx/nano-Ce0.60Zr0.35Y0.05O2 catalysts that are highly selective for the oxidative dehydrogenation of isobutane to isobutene
Abstract

Fluorite-type nanosized Ce0.60Zr0.35Y0.05O2 (nano-CZY) solid solution catalysts that are relatively uniform in particle size (4–5 nm) and y CrOx/nano-CZY (y is the weight percentage of Cr2O3 ranging from 2 to 10 wt%) catalysts were prepared by the ethylene glycol-assisted CTAB-templated co-precipitation and incipient wetness impregnation methods, respectively. The materials were characterized by a number of analytical techniques and their catalytic performance was evaluated for the oxidative dehydrogenation of isobutane. The y CrOx/nano-CZY catalysts show excellent activities, with the y = 8 wt% one performing the best (ca. 93% isobutene selectivity and ca. 10% isobutene yield at 540 °C and 30,000 mL/(gcat h)). We conclude that the good reducibility of the highly dispersed CrOx domains and the promotion of O2 adsorption at oxygen vacancies of nano-CZY (for enhanced oxidation of the reduced catalyst) are responsible for the excellent performance of the 8 wt% CrOx/nano-CZY catalyst.

Graphical abstractNanosized Ce0.60Zr0.35Y0.05O2 (nano-CZY) solid solution with a particle size of 4–5 nm and CrOx/nano-CZY catalysts were prepared. The 8 wt% CrOx/nano-CZY catalyst performs the best, giving 93% isobutene selectivity and 10% isobutene yield at 540 °C in isobutane oxidative dehydrogenation. Such an excellent performance is related to the good reducibility of CrOx domains and the promotion of O2 adsorption at oxygen vacancies of nano-CZY.Figure optionsDownload full-size imageDownload high-quality image (287 K)Download as PowerPoint slide

Keywords
Ceria–zirconia–yttria solid solution; Nanoparticle; Supported chromia catalyst; Isobutane oxidative dehydrogenation
First Page Preview
CrOx/nano-Ce0.60Zr0.35Y0.05O2 catalysts that are highly selective for the oxidative dehydrogenation of isobutane to isobutene
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
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 375, Issue 2, 1 March 2010, Pages 272–278
Authors
, , , , , , ,
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