fulltext.study @t Gmail

Photocatalytic degradation of ethylene: An FTIR in situ study under atmospheric conditions

Paper ID Volume ID Publish Year Pages File Format Full-Text
46798 46449 2011 6 PDF Available
Title
Photocatalytic degradation of ethylene: An FTIR in situ study under atmospheric conditions
Abstract

In this paper, the reaction mechanism of the photocatalytic oxidation of ethylene is elucidated by means of an in-house developed FTIR in situ reactor. This reactor allowed us to look at the catalytic surface at the moment the reactions actually occur. This new approach gave some exciting new insights in how ethylene is photocatalytically oxidised. It was found that there is a change in dipole moment of the ethylene molecule when it is brought in the neighbourhood of the catalyst. From this finding, a hypothesis was formulated on how the CC-bond from ethylene will break. It was found that the aforementioned interaction between the catalyst and the molecule, allows the excited electrons from the UV irradiated catalyst to occupy the lowest unoccupied molecular orbital (LUMO) of the ethylene molecule through a process known as backdonation. Following this hypothesis, it was found that the degradation occurs through the formation of two intermediates: formaldehyde and formic acid, for which formaldehyde is bound in two different ways (coordinatively and as bidentate). Finally CO2 and H2O are found as end products, resulting in the complete mineralisation of the pollutant.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► FTIR in situ reactor used for real time study of photocatalytic ethylene removal. ► Backdonation as hypothesis on how the oxidation reaction is initiated. ► Formaldehyde and formic acid are found as reaction intermediates.

Keywords
Photocatalysis; Ethylene; In situ FTIR study; Reaction mechanism; Molecular orbital theory
First Page Preview
Photocatalytic degradation of ethylene: An FTIR in situ study under atmospheric conditions
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 B: Environmental - Volume 105, Issues 1–2, 9 June 2011, Pages 111–116
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