Study on catalyst for hydrogenation of methyl benzoate to benzaldehyde at low H2/ester molar ratio

Ruifeng Zhan, Mifen Cui, Xu Qiao, Juan Xue, Jihai Tang

科研成果: 期刊稿件文章同行评审

1 引用 (Scopus)

摘要

The effects of ZnO/MnO mass ratio and ZnO, MnO and K+ loading amount on the activity and selectivity of catalyst used for the hydrogenation of methyl benzoate to benzaldehyde at 1.5 molar ratio of H2/Ester were studied. The results showed that the catalytic activity was higher when MnO/ZnO mass ratio was 1. The conversion was over 99% when the loading amount of activity component was 25%-30% and temperature was 440°C. Al2O3 carrier was no activity, but X-Ray Diffraction (XRD) analysis showed that Al2O3 carrier could distributed the activity components well in its surface and made the catalytic activity increasing. The suitable KC1 mass fraction was 3%. The activity and selectivity was 93.51% and 79.83% respectively, by using 3% KCl-25% MnO-ZnO/γ-Al2O3 catalyst for the hydrogenation of methyl benzoate to benzaldehyde under the atmospheric pressure, 420°C, resident time 250 (g·h)/mol and 1.5 H2/Ester molar ratio. Conversion was only 22.60% and 18.96% when K-MnO/γ-Al2O3 and Li-ZnO/γ-Al2O3 catalysts reported in previous literatures were respectively used under the same reaction conditions. It was showed that the catalytic activities were greatly reduced when the catalysts reported in previous documents were used at low H2/Ester molar ratio.

源语言英语
页(从-至)407-412
页数6
期刊Huaxue Fanying Gongcheng Yu Gongyi/Chemical Reaction Engineering and Technology
22
5
出版状态已出版 - 10月 2006

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