fulltext.study @t Gmail

Effect of surface Lewis acidity on selective catalytic reduction of NO by C3H6 over calcined hydrotalcite

Paper ID Volume ID Publish Year Pages File Format Full-Text
40566 45858 2013 8 PDF Available
Title
Effect of surface Lewis acidity on selective catalytic reduction of NO by C3H6 over calcined hydrotalcite
Abstract

The selective catalytic reduction (SCR) of NO by C3H6 has been studied over a series of calcined hydrotalcite, which were prepared by four different methods to obtain various Lewis acid sites. The catalysts have been investigated by X-ray powder diffractometer, N2 adsorption, Temperature-programmed desorption of NH3 (NH3-TPD), pyridine adsorption FTIR (Py-FTIR), Temperature-programmed desorption of NO + O2 (NO + O2-TPD) and in situ FTIR techniques. The Lewis acid sites could be changed with the transformation of the crystalline structure from the mixed oxides of MgO and Al2O3 to spinel phase. It is demonstrated that Lewis acid sites play an important role in determining the catalytic performance of SCR by C3H6 over calcined hydrotalcite catalysts. Various nitrate species as the key intermediate species for SCR could form at Lewis acid sites during the process of the reaction under lean-burn condition.

Graphical abstract.Figure optionsDownload full-size imageDownload high-quality image (206 K)Download as PowerPoint slideHighlights► Calcined hydrotalcite prepared by four methods to obtain various Lewis acid sites. ► Lewis acid sites changed with transformation from mixed oxides to spinel phase. ► Various nitrate species as the key intermediates form at different Lewis acid sites. ► Lewis acid sites play an important role in SCR by C3H6 over calcined hydrotalcite.

Keywords
Lewis acidity; Hydrotalcite; Temperature-programmed desorption; In situ FTIR
First Page Preview
Effect of surface Lewis acidity on selective catalytic reduction of NO by C3H6 over calcined hydrotalcite
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 451, 31 January 2013, Pages 176–183
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