fulltext.study @t Gmail

Generation of Brønsted acid sites on Al2O3-supported Ta2O5 calcined at high temperatures

Paper ID Volume ID Publish Year Pages File Format Full-Text
55174 47042 2012 8 PDF Available
Title
Generation of Brønsted acid sites on Al2O3-supported Ta2O5 calcined at high temperatures
Abstract

An alumina-supported tantalum oxide (Ta2O5/Al2O3) calcined at 1223 K promoted both Friedel–Crafts alkylation of anisole with benzyl alcohol and isomerization of α-pinene, and exhibited Brønsted acidity despite the high temperature calcination. Among the Ta2O5/Al2O3 catalysts tested, 33 wt% Ta2O5/Al2O3 calcined at 1223 K showed the highest activity. A monolayer of tantalum acid-like compound, which has distorted octahedral symmetry, was stabilized over 33 wt% Ta2O5/Al2O3 catalyst calcined at 1223 K. The two-dimensional Ta–O–Ta network of stabilized tantalum acid-like compound probably accounts for the generation of Brønsted acid.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (192 K)Download as PowerPoint slideHighlights► Generation of acid sites on Ta2O5/Al2O3 calcined at high temperature. ► Ta2O5/Al2O3 showed catalytic activity for Friedel–Crafts alkylation and α-pinene isomerization. ► A monolayer of tantalum acid-like compound was stabilized. ► The two-dimensional Ta–O–Ta network probably accounts for the generation of Brønsted acid.

Keywords
Brønsted acid; Tantalum acid; High temperature calcination; Friedel–Crafts alkylation; α-Pinene isomerization
First Page Preview
Generation of Brønsted acid sites on Al2O3-supported Ta2O5 calcined at high temperatures
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: Catalysis Today - Volume 192, Issue 1, 30 September 2012, Pages 189–196
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