2-Ethyl-9,10-anthraquinone assisted sol-gel synthesis of Pd/γ-Al2O3 nanorods with enhanced catalytic performance in 2-ethyl-9,10-anthraquinone hydrogenation

doi:10.1016/j.cjche.2019.01.003

Abstract

Abstract: A series of nanorod-like porous Pd/γ-Al₂O₃ catalysts with controllable textural properties and enhanced catalytic performance in 2-ethyl-9,10-anthraquinone (eAQ) hydrogenation for H₂O₂ preparation were successfully prepared via a facile sol-gel method using aluminum isopropoxide as aluminum precursor and eAQ as structure directing agent, sequential calcination and impregnation process with Na₂PdCl₄ solution. The physicochemical properties of the catalysts obtained with different addition amounts of eAQ were comparatively characterized by XRD, TG-DSC, BET, TEM, CO-TPR, H₂-TPR and H₂-O₂ titration. The results show that addition of eAQ can not only effectively control the textural properties (surface area, pore volume and average pore size) of the catalysts, but also lower their reduction temperature of active metal. Importantly, the catalyst obtained with an addition amount of 4 wt% eAQ shows the highest hydrogenation efficiency of 10.28 g·L^-1, which is 37.3% higher than 7.49 g·L^-1 of the catalyst obtained without eAQ.

Key words: Catalyst, Hydrogenation, Alumina, 2-Ethyl-9,10-anthraquinone, Structure directing agent, H₂O₂

摘要： A series of nanorod-like porous Pd/γ-Al₂O₃ catalysts with controllable textural properties and enhanced catalytic performance in 2-ethyl-9,10-anthraquinone (eAQ) hydrogenation for H₂O₂ preparation were successfully prepared via a facile sol-gel method using aluminum isopropoxide as aluminum precursor and eAQ as structure directing agent, sequential calcination and impregnation process with Na₂PdCl₄ solution. The physicochemical properties of the catalysts obtained with different addition amounts of eAQ were comparatively characterized by XRD, TG-DSC, BET, TEM, CO-TPR, H₂-TPR and H₂-O₂ titration. The results show that addition of eAQ can not only effectively control the textural properties (surface area, pore volume and average pore size) of the catalysts, but also lower their reduction temperature of active metal. Importantly, the catalyst obtained with an addition amount of 4 wt% eAQ shows the highest hydrogenation efficiency of 10.28 g·L^-1, which is 37.3% higher than 7.49 g·L^-1 of the catalyst obtained without eAQ.

关键词: Catalyst, Hydrogenation, Alumina, 2-Ethyl-9,10-anthraquinone, Structure directing agent, H₂O₂

Weiquan Cai, Junlin Zhuo, Jimin Fang, Zhichao Yang. 2-Ethyl-9,10-anthraquinone assisted sol-gel synthesis of Pd/γ-Al₂O₃ nanorods with enhanced catalytic performance in 2-ethyl-9,10-anthraquinone hydrogenation[J]. Chinese Journal of Chemical Engineering, 2019, 27(8): 1863-1869.

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2-Ethyl-9,10-anthraquinone assisted sol-gel synthesis of Pd/γ-Al₂O₃ nanorods with enhanced catalytic performance in 2-ethyl-9,10-anthraquinone hydrogenation

2-Ethyl-9,10-anthraquinone assisted sol-gel synthesis of Pd/γ-Al₂O₃ nanorods with enhanced catalytic performance in 2-ethyl-9,10-anthraquinone hydrogenation

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