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| 钼铁催化剂的微结构及其对二甲苯选择氧化的催化性能 | |
| 引用本文： | 刘自力,梁历辉,文怀有,秦祖赠,刘艳冰,陈胜洲.钼铁催化剂的微结构及其对二甲苯选择氧化的催化性能[J].化学反应工程与工艺,2009,25(5). |
| 作者姓名： | 刘自力 梁历辉 文怀有 秦祖赠 刘艳冰 陈胜洲 |
| 作者单位： | 1. 广州大学化学化工学院,广东,广州,510006;广西大学化学化工学院,广西,南宁,530004 2. 中国石油华东销售分公司,上海,200232 3. 广西大学化学化工学院,广西,南宁,530004 4. 广州大学化学化工学院,广东,广州,510006 |
| 摘 要： | 采用溶胶-凝胶法制备了Mo-Fe催化剂,考察了其对对二甲苯催化氧化合成对苯二甲醛的催化性能.结果表明,对二甲苯在该催化剂上的转化率为86%,对苯二甲醛的选择性为50%.采用X射线衍射(XRD)、程序升温还原(TPR)和射线光电子能谱(XPS)等手段对Mo-Fe催化剂进行了表征.分析表明,Mo-Fe催化剂主要由MoO_与Fe_2(MoO_4)_3两种物相组成,两者的比例约为11:8.催化剂稳定性实验结果表明,Mo-Fe催化剂在450℃下反应,其活性可稳定在15左右.催化剂失活主要是催化剂中MoO_3被还原为MoO_2以及Fe_2(MoO_4)_3结构被破坏. |
| 关 键 词： | 钼铁催化剂 对二甲苯 对苯二甲醛 选择氧化 |
Microstructure of Mo-Fe Catalysts and Their Catalytic Performance for Selective Oxidation of p-Xylene |
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| Liu Zili,Liang Lihui,Wen Huaiyou,Qin Zuzeng,Liu Yanbing,Chen Shenzhou.Microstructure of Mo-Fe Catalysts and Their Catalytic Performance for Selective Oxidation of p-Xylene[J].Chemical Reaction Engineering and Technology,2009,25(5). | |
| Authors: | Liu Zili Liang Lihui Wen Huaiyou Qin Zuzeng Liu Yanbing Chen Shenzhou |
| Abstract: | Mo-Fe catalysts were prepared successfully by sol-gel method.Gas-phase catalytic oxidation synthesis of Terephthalaldehyde(TPAL)from P-xylene was used as a probe reaction.The results showed that the conversion of p-xylene was 86%and the selectivity of TPAL was 50% over the Mo-Fe catalyst.The Mo-Fe catalysts prepared by sol-gel method were characterized by X-ray diffraction(XRD),temperature programmed reduction(TPR) and X-ray photoelectronic spectroscopy(XPS).The results indicated that Mo-Fe catalyst was composed of MoO_3 and Fe_2(MoO_4)_3 crystals,and molar ratio of MoO_3 and Fe_2(MoO_4)_3 was 11/8.The stability experiment of catalysts showed that the catalytic activity of Mo-Fe catalyst can be stabilized for about 15 h at 450℃.It was the main reason of deactivation that MoO_3 was reduced to MoO_2 and Fe_2(MoO_4)_3 structure was destroyed. |
| Keywords: | molybdenum-iron catalyst P-xylene terephthalaldehyde selective oxidation |
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