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Catalytic oxidation of toluene over copper and manganese based catalysts: Effect of water vapor

Paper ID Volume ID Publish Year Pages File Format Full-Text
51709 46851 2011 5 PDF Available
Title
Catalytic oxidation of toluene over copper and manganese based catalysts: Effect of water vapor
Abstract

Copper and manganese based catalysts with different supports were prepared by impregnation method for toluene oxidation in the presence of water vapor. Their catalytic activity was tested in the absence and presence of water vapor. The results showed that the activity of catalysts CuMn(y)Ox/γ-Al2O3 was higher than that of catalysts CuOx/γ-Al2O3 and MnOx/γ-Al2O3. The presence of water vapor had a negative effect on catalytic activity due to the competition of water molecules with toluene molecules for adsorption on surface active sites. The durability to water vapor followed the order: CuMn(1)Ox/Cordierite > CuMn(1)Ox/TiO2 > CuMn(1)Ox/γ-Al2O3.

Graphical abstractThe activity of the catalysts CuMn(y)Ox/γ-Al2O3 was higher than that of the catalysts CuOx/γ-Al2O3 and MnOx/γ-Al2O3. The presence of water vapor had a negative effect on the catalytic activity of the copper and manganese based catalysts due to the competition of water molecules with toluene molecules for adsorption on surface active sites. The degree of degradation in the catalytic activity of the catalysts by water vapor followed the order: CuMn(1)Ox/γ-Al2O3 > CuMn(1)Ox/TiO2 > CuMn(1)Ox/Cordierite, which was attributed to the different strength of interaction between water molecules and catalyst surfaces.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► CuMn(y)Ox/γ-Al2O3 have higher activity than CuOx/γ-Al2O3 and MnOx/γ-Al2O3. ► The formation of spinel phase Cu1.5Mn1.5O4 is responsible for enhanced activity. ► The presence of water vapor has negative influence on the catalytic activity. ► The activity decreases due to competition adsorption of H2O and toluene molecules. ► The interaction of H2O with the surfaces of CuMn(1)Ox/Cordierite is the weakest.

Keywords
Catalytic oxidation; Toluene; Copper–manganese based catalysts; Water vapor
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Catalytic oxidation of toluene over copper and manganese based catalysts: Effect of water vapor
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 14, Issue 1, 25 October 2011, Pages 15–19
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
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Any Questions? feel free to contact us