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Catalytic decomposition of 4-phenoxyphenol over Pd/XCs2.5H0.5PW12O40/ACA (activated carbon aerogel)-SO3H (X = 10–30 wt%) catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
40407 45852 2013 8 PDF Available
Title
Catalytic decomposition of 4-phenoxyphenol over Pd/XCs2.5H0.5PW12O40/ACA (activated carbon aerogel)-SO3H (X = 10–30 wt%) catalysts
Abstract

Activated carbon aerogel (ACA) bearing sulfonic acid group (ACA-SO3H) was prepared by a sulfonation of activated carbon aerogel, and subsequently, Cs2.5H0.5PW12O40 was impregnated on ACA-SO3H to form XCs2.5H0.5PW12O40/ACA-SO3H with a variation of Cs2.5H0.5PW12O40 content (X = 10, 15, 20, 25, and 30 wt%). Palladium catalysts were then supported on XCs2.5H0.5PW12O40/ACA-SO3H by an incipient wetness impregnation method. The prepared Pd/XCs2.5H0.5PW12O40/ACA-SO3H catalysts were applied to the decomposition of 4-phenoxyphenol. 4-Phenoxyphenol was used as a lignin model compound for representing 4-O-5 linkage of lignin. Cyclohexanol, benzene, and phenol were mainly produced by the decomposition of 4-phenoxyphenol. Acidity of Pd/XCs2.5H0.5PW12O40/ACA-SO3H catalysts played an important role in the decomposition of 4-phenoxyphenol. Conversion of 4-phenoxyphenol and total yield for main products (cyclohexanol, benzene, and phenol) increased with increasing acidity of Pd/XCs2.5H0.5PW12O40/ACA-SO3H. Among the catalysts tested, Pd/15Cs2.5H0.5PW12O40/ACA-SO3H with the largest acidity showed the highest conversion of 4-phenoxyphenol and total yield for main products. Conversion of 4-phenoxyphenol and total yield for main products over Pd/15Cs2.5H0.5PW12O40/ACA-SO3H were much higher than those over palladium catalyst supported on activated carbon aerogel (Pd/ACA) and palladium catalyst supported on activated carbon aerogel bearing sulfonic acid group (Pd/ACA-SO3H). Furthermore, Pd/15Cs2.5H0.5PW12O40/ACA-SO3H catalyst was stable and reusable in the decomposition of 4-phenoxyphenol.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (106 K)Download as PowerPoint slideHighlights► Pd/XCs2.5H0.5PW12O40/ACA-SO3H (X = 10–30 wt%) catalysts were prepared. ► Catalytic decomposition of 4-phenoxyphenol was conducted. ► Acidity of the catalysts played an important role in the reaction. ► Total yield for main products increased with increasing acidity of the catalysts.

Keywords
Heteropolyacid; Activated carbon aerogel bearing sulfonic group; Pd catalyst; 4-Phenoxyphenol; Decomposition
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Catalytic decomposition of 4-phenoxyphenol over Pd/XCs2.5H0.5PW12O40/ACA (activated carbon aerogel)-SO3H (X = 10–30 wt%) catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 453, 26 February 2013, Pages 287–294
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
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Price after discount Only $4.95
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