fulltext.study @t Gmail

Evaluation of manganese OMS-like cryptomelane supported on SBA-15 in the oxidation of ethyl acetate

Paper ID Volume ID Publish Year Pages File Format Full-Text
54819 47027 2013 8 PDF Available
Title
Evaluation of manganese OMS-like cryptomelane supported on SBA-15 in the oxidation of ethyl acetate
Abstract

We report the synthesis of four manganese catalysts supported on SBA-15 via a multistep impregnation method. The successive impregnations allowed as much as 13.8% manganese to be deposited without loss of the mesoporous structure of the SBA-15, although the surface area of the catalysts and their pore size distributions were lower than those of the pure SBA-15. The data obtained using different analysis techniques indicate that the manganese was incorporated into the pure SBA-15 in different positions: grafted onto the internal surface of the walls, incorporated into the framework of the SBA-15 and on the external surface and at the pores mouth of the SBA-15, which partially blocked the porosity. The XRD results showed that cryptomelane phase was formed in all of the catalysts; the remaining P123 in the SBA-15 structure and the presence of K+ during the impregnation most likely favored the formation of the cryptomelane phase. Total oxidation of ethyl acetate in air was obtained at temperatures less than 350 °C for all of the catalysts.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (228 K)Download as PowerPoint slideHighlights► Mn deposited on SBA-15 without structural damage losing surface area and pore volume. ► Mn located in different positions of the catalysts. ► Remaining P123 in SBA-15 and K+ from KMnO4 favored cryptomelane phases. ► Activity in the oxidation of ethyl acetate is inversely proportional to Mn content. ► Increasing K+ content favors oxidation of ethyl acetate.

Keywords
Catalytic VOC abatement; Cryptomelane; Manganese oxides; Supported manganese catalysts; SBA-15
First Page Preview
Evaluation of manganese OMS-like cryptomelane supported on SBA-15 in the oxidation of ethyl acetate
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 212, 1 September 2013, Pages 149–156
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