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Benzene transalkylation with C9+ aromatics over supported 12-tungstophosphoric acid on silica catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
43548 45976 2007 6 PDF Available
Title
Benzene transalkylation with C9+ aromatics over supported 12-tungstophosphoric acid on silica catalysts
Abstract

Silica-supported H3PW12O40 (H3PW) catalysts (8, 15, 20 and 25 wt.% H3PW) were prepared and their catalytic activities were evaluated in benzene transalkylation with C9+ aromatics, using an industrial stream. This reaction is a convenient way to upgrade the low value of the stream produced in naphtha reforming and gasoline pyrolysis, by improving the production of xylenes. It was found that the activity and selectivity to xylenes changed with the acid loading and this was related to optimum acid strength and dispersion as well as specific surface area of the solids. The most active catalyst was the sample with 15 wt.% H3PW, which showed the adequate combination of the three parameters cited above. This solid was also the most stable, showing the lowest rate of deactivation under the reaction conditions, producing the least amount of coke. In addition, it presented the highest activity and selectivity to xylenes, even when compared to a mordenite commercial catalyst. Consequently, this catalyst represents a promising catalyst for industrial applications.

Graphical abstractH3PW12O40/SiO2 (8–25 wt.%) were prepared and evaluated in benzene transalkylation with C9+ aromatics. The activity and selectivity to xylenes changed with the acid loading and was related to optimum acid strength and dispersion as well as specific surface area of the solids. The most active (15 wt.%) showed the adequate combination of those parameters representing a promising catalyst for industrial applications.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Benzene transalkylation; 12-Tungstophosphoric acid; Silica; Supported heteropoly acid
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Benzene transalkylation with C9+ aromatics over supported 12-tungstophosphoric acid on silica catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 328, Issue 2, 10 September 2007, Pages 189–194
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
Online Support
Any Questions? feel free to contact us