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Temperature effect on the photo-epoxidation of propylene over V–Ti/MCM-41 photocatalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
50568 46802 2013 4 PDF Available
Title
Temperature effect on the photo-epoxidation of propylene over V–Ti/MCM-41 photocatalyst
Abstract

The effect of reaction temperature on the gas-phase photocatalytic epoxidation of propylene was systematically studied over V–Ti/MCM-41 photocatalyst at different temperatures (298–393 K). Temperature significantly influences the product distribution of photo-epoxidation. Raising temperature is favorable towards the formation of propionaldehyde (PA) due to inhibition of PA transformation to propionic acid (C2H5COOH), the intermediate product of acetaldehyde (AA). Results indicated that the reaction temperature has a dual-action to the reaction rate: (1) improving the desorption of reaction products, which provides more active sites for reaction and (2) reducing the adsorption of propylene on the photocatalyst, which declines the reaction efficiency.

Graphical abstractThe selectivity of products in the photo-epoxidation at different temperature conditions: (a) 298 K; (b) 323 K; (c) 348 K and (d) 393 K. Propylene oxide (PO), propionaldehyde (PA), acetone (AC), acetaldehyde (AA) and ethanol (ROH).Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Reaction temperature has a dual-action to the photo-epoxidation rate of propylene. ► Temperature significantly influences the product distribution of photo-epoxidation. ► Raising temperature is favorable towards the formation of propionaldehyde.

Keywords
Epoxidation; Photocatalysis; Propylene oxide; Temperature effect
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Temperature effect on the photo-epoxidation of propylene over V–Ti/MCM-41 photocatalyst
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 33, 5 March 2013, Pages 57–60
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
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Price was $35.95
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Price after discount Only $4.95
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Full-text PDF Download
Online Support
Any Questions? feel free to contact us