fulltext.study @t Gmail

Catalytic conversion of alcohols over alumina–zirconia mixed oxides: Reactivity and selectivity

Paper ID Volume ID Publish Year Pages File Format Full-Text
41392 45887 2011 8 PDF Available
Title
Catalytic conversion of alcohols over alumina–zirconia mixed oxides: Reactivity and selectivity
Abstract

The amorphous and crystalline mixed 25, 50 and 75 wt.% Al2O3–ZrO2 composites were prepared by means of sol–gel method using aluminum iso-propoxide and zirconyl nitrate precursors. Physicochemical properties were determined using XRD, BET, NH3-TPD, TGA, SEM, and FT-IR spectroscopy. Catalytic activity and selectivity were investigated for the dehydration of 2-octanol and 1,2-diphenyl-2-propanol (DPP). Al75Zr25 composite is more selective than other forms for the conversion of 2-octanol. The selectivity of DPP for 1-alkene formation was increased over Al25Zr75 catalyst. The crystalline 50 wt.% catalyst dehydrated tertiary alcohol (DPP) selectively in the presence of 2-octanol. The amorphous 50 wt.% catalyst dehydrated DPP predominately to 1-alkene isomer. The crystalline catalyst favored the formation of E-2-alkene.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (207 K)Download as PowerPoint slideHighlights► Mixed 25, 50 and 75 wt.% Al2O3–ZrO2 composites were prepared by means of sol–gel method. ► Doping ZrO2 with alumina eliminates m-ZrO2 but stabilizes the tetragonal phase. ► Crystalline composite selectively dehydrates DPP over 2-octanol to give E-alkene. ► The amorphous composite produced the least stable kinetically controlled 1-alkene. ► BET surface area at 600 (amorphous) and 1000 °C (crystalline) are 104.2 and 0.3 m2/g.

Keywords
Amorphous; Crystalline; Mixed Al2O3–ZrO2; Catalyst reactivity-selectivity; Dehydration
First Page Preview
Catalytic conversion of alcohols over alumina–zirconia mixed oxides: Reactivity and selectivity
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 404, Issues 1–2, 19 September 2011, Pages 141–148
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