| SBA-15负载氧化铁催化剂上乙酸选择加氢制乙醛 |
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| 引用本文： | 张雪峥,乐英红,高滋.SBA-15负载氧化铁催化剂上乙酸选择加氢制乙醛[J].高等学校化学学报,2003,24(1):121-124. |
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| 作者姓名： | 张雪峥 乐英红 高滋 |
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| 作者单位： | 复旦大学化学系分子催化与功能材料实验室,上海200433 |
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| 基金项目： | 国家重点基础研究发展规划项目 (批准号 :G2 0 0 0 0 775 0 0 )资助 |
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| 摘 要： | 制备了一系列SBA-15负载α-Fe2O3催化剂.研究了负载量、预还原温度和反应温度对乙酸选择加氢制乙醛反应的活性和选择性的影响.负载催化剂上乙醛的最高产率达到42.7%,比纯α-Fe2O3催化剂的32.2%高.催化剂表面Fe3O4和Fe0共存对提高反应性能有利.该反应有可能遵循Mars-vanKrevelen机理.
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| 关 键 词： | 氧化铁 SBA-15分子筛 选择加氢 乙酸 乙醛 |
| 文章编号： | 0251-0790(2003)01-0121-04 |
| 收稿时间： | 2002-03-26 |
Selective Hydrogenation of Acetic Acid to Acetaldehyde over SBA-15 Supported Iron Oxide Catalysts |
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| ZHANG Xue-Zheng,YUE Ying-Hong,GAO Zi.Selective Hydrogenation of Acetic Acid to Acetaldehyde over SBA-15 Supported Iron Oxide Catalysts[J].Chemical Research In Chinese Universities,2003,24(1):121-124. |
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| Authors: | ZHANG Xue-Zheng YUE Ying-Hong GAO Zi |
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| Institution: | ZHANG Xue-Zheng,YUE Ying-Hong,GAO Zi * |
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| Abstract: | A series of SBA-15 supported α-Fe2O3 catalysts were prepared and characterized. The influence of iron oxide loading, reduction temperature and reaction temperature on the catalytic activity and selectivity for the selective hydrogenation of acetic acid to acetaldehyde was investigated. The highest yield of acetaldehyde over the supported catalysts is 42.7%, whereas that over non-supported α-Fe2O3 is only 32.2%. The hydrogenation catalysts need to be prereduced before reaction. The optinum reduction temperatures for α-Fe2O3 and the supported catalyst are 873 and 923 K, respectively. The selective hydrogenation to acetaldehyde is favored when Fe3O4 and Fe0 coexist on the catalyst surface, and acetaldehyde is likely formed via a Mars-van Krevelen reaction mechanism. |
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| Keywords: | Iron oxide SBA-15 molecular sieve Selective hydrogenation Acetic acid Acetaldehyde |
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