Conversion of benzyl alcohol to benzonitrile over a Cu 10.3 /SiO 2 catalyst

催化作用 脱氢 苯甲腈 吡啶 胺化 解吸 苯甲醇 无机化学 化学 核化学 路易斯酸 吸附 材料科学 有机化学
作者
Yuecheng Zhang,Xiaofu Zhao,Hongyu Zhang,Yan Xiang,Jiquan Zhao
出处
期刊:Applied Catalysis A-general [Elsevier]
卷期号:522: 45-53 被引量:15
标识
DOI:10.1016/j.apcata.2016.04.031
摘要

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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