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Performance and mechanism about MnOx species included in MnOx/TiO2 catalysts for SCR at low temperature

Paper ID Volume ID Publish Year Pages File Format Full-Text
51234 46836 2012 5 PDF Available
Title
Performance and mechanism about MnOx species included in MnOx/TiO2 catalysts for SCR at low temperature
Abstract

Various MnOx states played diverse roles in the selective catalytic reduction (SCR). Precursors and atmospheres had essential influence on valence conditions of MnOx. TiO2-supported manganese oxide catalysts were prepared from three different precursors in N2, O2 and air atmospheres. These samples were characterized by XRD, TG–DSC–MS and thermodynamic calculation. Characterization results showed that MnO2 was acquired by calcining manganese nitrate (MN) and TiO2 in air, while manganese carbonate (MC) and manganese acetate (MA) precursors both caused mainly Mn2O3 and Mn3O4. MA-MnOx/TiO2 catalysts calcined in nitrogen demonstrated active ingredients of MnO2, Mn2O3 and Mn3O4, but consisted of MnO2, Mn2O3, Mn3O4 and MnTiO3 calcined in oxygen. Different MnOx were identified by thermodynamic parameters and TG–DSC–MS studies.

Graphical abstractCalcination atmospheres and the MnOx species played very important roles in the NOx conversion at low temperature.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Using reliable standard thermodynamic parameters to identify MnOx ► Catalysts calcined in nitrogen were more active. ► Different MnOx were identified by thermodynamic parameters and TG–DSC–MS studies. ► MnOx included in catalysts that were calcined in nitrogen tended to form Mn2O3 and Mn3O4.

Keywords
MnOx states; Standard entropies; SCR; Impregnation method
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Performance and mechanism about MnOx species included in MnOx/TiO2 catalysts for SCR at low temperature
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 28, 5 November 2012, Pages 77–81
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