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Brønsted acidity study of fiberglass materials by H/D-exchange

Paper ID Volume ID Publish Year Pages File Format Full-Text
42662 45936 2009 7 PDF Available
Title
Brønsted acidity study of fiberglass materials by H/D-exchange
Abstract

The kinetics of hydrogen isotopic exchange over fiberglass materials and reference samples (SiO2, H3PO4/SiO2, and HZSM-5) was studied at 500 °C under the dynamic adsorption–desorption equilibrium. The concentrations and H/D-exchange rates of different Brønsted acid sites (BAS) were determined using the numerical modeling of isotope exchange dynamics. The correlation between H/D-exchange rate of reference samples and their acidity determined by FTIR spectroscopy of adsorbed CO was established. Based on this correlation, the strength of BAS in fiberglass materials was shown to be comparable to that of HZSM-5 zeolite.

Graphical abstractThe kinetics of hydrogen isotopic exchange over fiberglass materials and reference samples (HZSM-5, SiO2, H3PO4/SiO2) was studied under the dynamic adsorption–desorption equilibrium. The numerical modeling of H/D-exchange dynamics provided the number of different Brønsted acid sites (BAS) of fiberglass materials. Besides, for the first time the correlation between H/D-exchange rate and proton affinity scale was established. The strength of BAS in fiberglass materials was shown to be comparable to that of HZSM-5.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Fiberglass materials; Brønsted acidity; H/D-exchange
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 366, Issue 2, 25 September 2009, Pages 262–268
Authors
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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