| Ag/ZrO2催化剂上的1,2-丙二醇选择性气相氧化反应 |
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| 引用本文： | 沈江,杜俊明,黄静静,杨新艳,沈伟,徐华龙,范康年.Ag/ZrO2催化剂上的1,2-丙二醇选择性气相氧化反应[J].化学学报,2007,65(5):403-408. |
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| 作者姓名： | 沈江 杜俊明 黄静静 杨新艳 沈伟 徐华龙 范康年 |
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| 作者单位： | 复旦大学化学系和上海市分子催化与功能材料重点实验室 上海200433 |
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| 摘 要： | 采用浸渍法制备了一系列Ag/ZrO2催化剂, 考察了Ag/ZrO2催化剂对1,2-丙二醇选择性氧化合成丙酮醛反应的催化性能. 实验结果表明: 在原料气配比为V(N2)∶V(O2)＝300∶19, n(O2)/n(alcohol)＝1.2, 反应物液时空速为3.2 g/(g?h), 反应温度为673 K时, 1,2-丙二醇选择性氧化合成丙酮醛反应的转化率为95.7%, 选择性为55.3%, 高于传统电解银催化剂. UV-Vis DRS和XPS的研究结果表明: 在Ag/ZrO2催化剂上存在大量的Ag＋和Agnδ＋有利于促进催化活性的提高.
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| 关 键 词： | 1 2-丙二醇 丙酮醛 α-羟基丙酮 银 氧化锆 电子态 紫外可见漫反射 |
| 收稿时间： | 2005-08-06 |
| 修稿时间： | 2005-08-062006-11-09 |
Gas-phase Selective Oxidation of 1,2-Propylene Glycol over Ag/ZrO2 Catalyst |
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| SHEN Jiang,DU Jun-Ming,HUANG Jing-Jing,YANG Xin-Yan,SHEN Wei,XU Hua-Long,FAN Kang-Nian.Gas-phase Selective Oxidation of 1,2-Propylene Glycol over Ag/ZrO2 Catalyst[J].Acta Chimica Sinica,2007,65(5):403-408. |
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| Authors: | SHEN Jiang DU Jun-Ming HUANG Jing-Jing YANG Xin-Yan SHEN Wei XU Hua-Long FAN Kang-Nian |
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| Institution: | Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Fudan University, Shanghai 200433 |
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| Abstract: | A series of Ag/ZrO2 catalysts were prepared by impregnation method. The catalytic performance for selective oxidation of 1,2-propylene glycol to methyl glyoxal was investigated. Under optimum reaction conditions V(N2)∶V(O2)＝300∶19, n(O2)/n(alcohol)＝1.2, LHSV＝3.2 g/(g?h) and temperature＝673 K], the conversion of 1,2-propylene glycol got to 95.7%, and the selectivity to methyl glyoxal was 55.3%, being higher than that over conventional electrolytic silver catalyst. The UV-vis DRS and XPS results indicated that the existence of large amount of Ag＋ and Agnδ＋ in Ag/ZrO2 catalysts contributes to the enhancement of catalytic activity. |
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| Keywords: | 1 2-propylene glycol methyl glyoxal a-hydroxyacetone silver zirconia electronic state UV-vis DRS |
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