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Conversion of benzyl alcohol to benzonitrile over a Cu10.3/SiO2 catalyst

Paper ID Volume ID Publish Year Pages File Format Full-Text
38698 45788 2016 9 PDF Available
Title
Conversion of benzyl alcohol to benzonitrile over a Cu10.3/SiO2 catalyst
Abstract

•Benzonitrile was synthesized via amination-dehydrogenation of benzyl alcohol over Cu/SiO2 catalysts.•The catalyst Cu10.3/SiO2 showed best performance among all the catalysts.•The doping of Cu created both Lewis acid sites and dehydrogenation active species in the matrix of SiO2.•The deactivation reasons of the catalyst were disclosed.

A Cu10.3/SiO2 catalyst was prepared for the conversion of benzyl alcohol to benzonitrile through amination-dehydrogenation process. The catalyst showed high activity in the reaction, and a yield as high as 98.0% was reached under the optimized conditions. The catalyst was characterized by XRD, TEM-EDX, TG-DSC, N2 adsorption-desorption and IR of absorbed pyridine methods. The characterization results disclosed that the doping of copper created Lewis acid sites in the matrix of SiO2. The doped copper in the fresh catalyst was present in CuO state, which was reduced to elemental Cu by H2 generated in situ in the catalytic run. The characterization results also disclosed that the catalyst deactivation was mainly caused by the carbonaceous deposition on the surface of the catalyst in the catalytic reaction. The experimental results confirmed that most activity of the catalyst can be recovered at 550 °C online by blowing air into the reactor. Partial sintering of copper particles took place during the catalytic run, which led to the slight decreases of Lewis acidity and dehydrogenation capacity, therefore, caused deviation of the performance of the regenerated Cu10.3/SiO2 catalyst from that of the fresh one.

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Keywords
Benzonitrile; Benzyl alcohol; Amination-dehydrogenation; Ammonia
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Conversion of benzyl alcohol to benzonitrile over a Cu10.3/SiO2 catalyst
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 522, 25 July 2016, Pages 45–53
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
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