Gold/Mg-Al mixed oxides catalysts for oxidative esterification of methacrolein: Effects of support size and composition on gold loading

doi:10.1016/j.cjche.2023.05.006

中国化学工程学报 ›› 2023, Vol. 64 ›› Issue (12): 128-138.DOI: 10.1016/j.cjche.2023.05.006

• Full Length Article • 上一篇下一篇

Gold/Mg-Al mixed oxides catalysts for oxidative esterification of methacrolein: Effects of support size and composition on gold loading

Wangtao Li¹, Qiancheng Zheng¹, Huayu Zhang¹, Yunsheng Dai², Zhengbao Wang¹

1. Key Laboratory of Biomass Chemical Engineering of Ministry of Education, ERC of Membrane and Water Treatment (MOE), Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China;
2. Yunnan Precious Metals Laboratory Co., Ltd, Kunming 650106, China

收稿日期:2023-03-23 修回日期:2023-05-24 出版日期:2023-12-28 发布日期:2024-02-05
通讯作者: Yunsheng Dai,E-mail:daiysh@ipm.com.cn;Zhengbao Wang,E-mail:zbwang@zju.edu.cn
基金资助:
This work is supported by Open Project of Yunnan Precious Metals Laboratory Co., Ltd (YPML-2023050269) and the Fundamental Research Funds for the Central Universities (226-2023-00085, 226-2023-00057).

Gold/Mg-Al mixed oxides catalysts for oxidative esterification of methacrolein: Effects of support size and composition on gold loading

Wangtao Li¹, Qiancheng Zheng¹, Huayu Zhang¹, Yunsheng Dai², Zhengbao Wang¹

1. Key Laboratory of Biomass Chemical Engineering of Ministry of Education, ERC of Membrane and Water Treatment (MOE), Zhejiang Provincial Key Laboratory of Advanced Chemical Engineering Manufacture Technology, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China;
2. Yunnan Precious Metals Laboratory Co., Ltd, Kunming 650106, China

Received:2023-03-23 Revised:2023-05-24 Online:2023-12-28 Published:2024-02-05
Contact: Yunsheng Dai,E-mail:daiysh@ipm.com.cn;Zhengbao Wang,E-mail:zbwang@zju.edu.cn
Supported by:
This work is supported by Open Project of Yunnan Precious Metals Laboratory Co., Ltd (YPML-2023050269) and the Fundamental Research Funds for the Central Universities (226-2023-00085, 226-2023-00057).

摘要/Abstract

摘要： Gold catalysts supported on Mg-Al mixed oxides for oxidative esterification of methacrolein are prepared by impregnation. Effects of the support particle size, concentration of HAuCl₄ solution and Mg/Al ratio on gold loading and catalytic properties are investigated. The catalysts are characterized by CO₂-TPD, EDS, XPS, STEM and XRD techniques. Catalysts with smaller support particle size show more uniform gold distribution and higher gold dispersion, resulting in a higher catalytic performance, and the uniformity of gold and the activity of the catalysts with larger support particle size can be improved by decreasing the concentration of HAuCl₄ solution. The Mg/Al molar ratio has significant effect on the uniformity of gold and the activity of the catalyst, and the optimum Mg/Al molar ratio is 0.1–0.2. This study underlines the importance of engineering support particle size, concentration of HAuCl₄ solution and density of adsorption sites for efficient gold loading on support by impregnation.

关键词: Gold catalysts, Oxidative esterification, Support particle size effect, Mass transfer, Distributions, Optimization

Abstract: Gold catalysts supported on Mg-Al mixed oxides for oxidative esterification of methacrolein are prepared by impregnation. Effects of the support particle size, concentration of HAuCl₄ solution and Mg/Al ratio on gold loading and catalytic properties are investigated. The catalysts are characterized by CO₂-TPD, EDS, XPS, STEM and XRD techniques. Catalysts with smaller support particle size show more uniform gold distribution and higher gold dispersion, resulting in a higher catalytic performance, and the uniformity of gold and the activity of the catalysts with larger support particle size can be improved by decreasing the concentration of HAuCl₄ solution. The Mg/Al molar ratio has significant effect on the uniformity of gold and the activity of the catalyst, and the optimum Mg/Al molar ratio is 0.1–0.2. This study underlines the importance of engineering support particle size, concentration of HAuCl₄ solution and density of adsorption sites for efficient gold loading on support by impregnation.

Key words: Gold catalysts, Oxidative esterification, Support particle size effect, Mass transfer, Distributions, Optimization

Wangtao Li, Qiancheng Zheng, Huayu Zhang, Yunsheng Dai, Zhengbao Wang. Gold/Mg-Al mixed oxides catalysts for oxidative esterification of methacrolein: Effects of support size and composition on gold loading[J]. 中国化学工程学报, 2023, 64(12): 128-138.

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Gold/Mg-Al mixed oxides catalysts for oxidative esterification of methacrolein: Effects of support size and composition on gold loading

Gold/Mg-Al mixed oxides catalysts for oxidative esterification of methacrolein: Effects of support size and composition on gold loading

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