| MgO-SBA-15 Supported Pd-Pb Catalysts for Oxidative Esterification of Methacrolein with Methanol to Methyl Methacrylate☆ |
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| 引用本文： | Li Jiang,Yanyan Diao,Junxing Han,Ruiyi Yan,Xiangping Zhang,Suojiang Zhang. MgO-SBA-15 Supported Pd-Pb Catalysts for Oxidative Esterification of Methacrolein with Methanol to Methyl Methacrylate☆[J]. 中国化学工程学报, 2014, 22(10): 1098-1104. DOI: 10.1016/j.cjche.2014.08.002 |
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| 作者姓名： | Li Jiang Yanyan Diao Junxing Han Ruiyi Yan Xiangping Zhang Suojiang Zhang |
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| 作者单位： | 1.Key Laboratory of Green Process and Engineering, Beijing Key Laboratory of Ionic Liquids Clean Process, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;2.University of Chinese Academy of Sciences, Beijing 100049, China |
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| 基金项目： | Supported by the Key Program of the National Natural Science Foundation of China (21036007) and the National High-Tech Project of China (2012AA062903). |
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| 摘 要： | Novel MgO–SBA-15 supported catalysts were prepared for oxidative esterification of methacrolein (MAL) with methanol to methyl methacrylate (MMA). The MgO–SBA-15 supports were synthesized with different...
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| 关 键 词： | Methacrolein Methyl methacrylate Oxidative esterification Pd-Pb bimetal SBA-15 |
| 收稿时间： | 2013-02-26 |
MgO-SBA-15 Supported Pd-Pb Catalysts for Oxidative Esterification of Methacrolein with Methanol to Methyl Methacrylate |
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| Li Jiang,Yanyan Diao,Junxing Han,Ruiyi Yan,Xiangping Zhang,Suojiang Zhang. MgO-SBA-15 Supported Pd-Pb Catalysts for Oxidative Esterification of Methacrolein with Methanol to Methyl Methacrylate[J]. Chinese Journal of Chemical Engineering, 2014, 22(10): 1098-1104. DOI: 10.1016/j.cjche.2014.08.002 |
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| Authors: | Li Jiang Yanyan Diao Junxing Han Ruiyi Yan Xiangping Zhang Suojiang Zhang |
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| Affiliation: | 1.Key Laboratory of Green Process and Engineering, Beijing Key Laboratory of Ionic Liquids Clean Process, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China;2.University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | Novel MgO-SBA-15 supported catalysts were prepared for oxidative esterification of methacrolein (MAL) with methanol to methyl methacrylate (MMA). The MgO-SBA-15 supports were synthesized with different magnesia loadings fromdifferentmagnesiumprecursors and hydrochloric acidmolar concentrations. The MgO-SBA-15 supports and Pd-Pb/MgO-SBA-15 catalysts were characterized by several analysismethods. The results revealed that the addition ofMgO improved the ordered structure of SBA-15 supports and provided surface alkalinity of SBA-15 supports. The average size of the Pd3Pb particles onmagnesia-modified Pd-Pb/MgO-SBA-15 catalystswas smaller than that on the pure silica-based Pd-Pb/SBA-15 catalysts. The experiments on catalyst performance showed that the magnesia-modified Pd-Pb/MgO-SBA-15 catalysts had higher activity than pure silica-based Pd-Pb/SBA-15 catalysts, showing the strong dependence of catalytic activity on the average size of active particles. The difference of activity between Pd-Pb/SBA-15 catalysts and Pd-Pb/MgO-SBA-15 catalystswas due to the discrepant structural properties and surface alkalinity provided by MgO, which led to the different Pd3Pb particle sizes and then resulted in the different number of active sites. Besides magnesia loadings, other factors, such as hydrochloric acid molar concentration and magnesium precursors, had considerable influences on the catalytic activity. |
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| Keywords: | Methacrolein Methyl methacrylate Oxidative esterification Pd-Pb bimetal SBA-15 |
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