| 第 31 卷第 3 期 |  | Vol. 31 No. 3 | | 2001 年 6 月 | Jun 2001 |
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所属栏目：其它
Li~+/MgO上交叉偶联作用的研究 |
| 蔡炳新; 周小平; 陈丽娟; 周冰; 任湘; 郭小华(湖南大学化学化工学院) |
| 摘 要：采用Li+/MgO催化剂研究了Li含量、反应温度、原料气组成对甲烷和甲苯催化氧化交叉偶联成乙苯或苯乙烯 (即C8)反应的影响 ,对几种Li含量催化剂上各影响因素引起的差异进行了考察。结果表明 ,其活性中心也主要是Li+O- ,合适的L酸点是本交叉偶联反应中反应物的吸附中心 ,Li+O- 和L酸点是决定偶联反应产物C2 和C8的主要因素。偶联可能主要按游离基机理进行 |
| 关键词：交叉偶联; 活性中心; 催化剂 |
| 中图分类号：O643.3 文献标识码：A 文章编号：1009-9212(2001)03-0011-04 |
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| Studies on Oxidative Cross Coupling of Methane and methylbenzene on Li~+/MgO Catalysts |
| CAI Bing xin; ZHOU Xiao ping; CHEN Li juan; ZHOU Bing; REN Xiang; GUO Xiao hua （Institute of Chemistry and Chemical Engineering; Hunan University; Changsha 410082; China） |
| Abstract：The cross oxidative coupling of methane and methylbenzene to ethylbenzene or styrene has been studied over Li + doped MgO catalysts. The effect of Lithium content, reaction temperature and feed composition on the cross oxidative coupling reaction have been examined. It is found that the active centres of cross oxidative coupling are also the species Li +O - as suggested in methane oxidative coupling and that seats of L acid are adsorption centres of cross coupling, and that selection of C 2 and C 8 are... |
| Key words：coupling; active centres; catalyst |
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收稿日期：2001-04-30
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