fulltext.study @t Gmail

Catalytic and physicochemical properties of modified natural clinoptilolite

Paper ID Volume ID Publish Year Pages File Format Full-Text
53547 46974 2016 9 PDF Available
Title
Catalytic and physicochemical properties of modified natural clinoptilolite
Abstract

•A natural clinoptilolite from Kučin was modified chemically in a systematic way.•Physicochemical properties of the materials obtained were studied.•The kinetics of α-pinene consumption was assessed.•The initial (overall and individual) reaction rate constants were calculated.•Apparent activation energies for the representative samples were obtained.

A natural specimen from the deposit at Kučin (Slovakia), rich in clinoptilolite type zeolite, was dealuminated using HCl solutions of increasing concentration (0.05–11.5 M). The samples were characterized by XRD, sorption of nitrogen, TPD of ammonia, FT IR and NMR spectroscopies. The preparations modified under mild conditions (acid concentration, temperature of dealumination) retained largely their crystallinity and acidity, and were active in the liquid phase isomerization of α-pinene. Upon more severe treatments, the samples became partially amorphous and lost their catalytic activity. The kinetics of α-pinene isomerization was studied over the most active catalysts. The reaction rate constants and apparent energies of activation were obtained. Initial reaction rates over the clinoptilolite type catalysts were compared with other acidic catalysts, including ferrierite-type zeolites.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (54 K)Download as PowerPoint slide

Keywords
Natural clinoptilolite; Dealumination; α-Pinene isomerization; Kinetics
First Page Preview
Catalytic and physicochemical properties of modified natural clinoptilolite
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 259, Part 1, 1 January 2016, Pages 50–58
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