fulltext.study @t Gmail

Skeletal isomerization of unsaturated fatty acids on Beta zeolites: Effects of calcination temperature and additives

Paper ID Volume ID Publish Year Pages File Format Full-Text
42647 45935 2009 5 PDF Available
Title
Skeletal isomerization of unsaturated fatty acids on Beta zeolites: Effects of calcination temperature and additives
Abstract

A commercial Beta-type zeolite was studied for upgrading unsaturated fatty acids, a renewable feedstock. Catalyst calcination and additive addition were investigated aiming to improve the catalytic activity for the skeletal isomerization of oleic acid. Calcination at a temperature around 450 °C instead of the commonly used 550 °C generated catalysts with relatively low surface areas but high activities, which is attributed to the high Brønsted acidity as revealed by FTIR characterization. Addition of a small amount of water (2–5 wt% of fatty acid) to the fatty acid promoted the conversion, but any further increase in the amount of water would result in a catalytic activity loss. Although methanol did not show a promoting effect for the isomerization, the methyl ester of oleic acid showed a higher conversion than oleic acid on the same catalyst. The poisoning effect of the carboxylic group on oleic acid was demonstrated by the comparison of the isomerization reactions of oleic acid and 1-octadecene.

Graphical abstractA commercial Beta zeolite calcined at about 450 °C generated catalysts with high activities for the skeletal isomerization of oleic acid. Addition of a small amount of water to the fatty acid promoted the conversion. The poisoning effect of the carboxylic group of oleic acid was demonstrated by the comparison of the isomerization reactions of oleic acid and 1-octadecene.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Isomerization; Fatty acid; Beta zeolite; Catalyst
First Page Preview
Skeletal isomerization of unsaturated fatty acids on Beta zeolites: Effects of calcination temperature and additives
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 356, Issue 1, 1 March 2009, Pages 52–56
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