| 第 31 卷第 3 期 |  | Vol. 31 No. 3 | | 2001 年 6 月 | Jun 2001 |
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所屬欄目：其它
Li~+/MgO上交叉偶聯(lián)作用的研究 |
| 蔡炳新; 周小平; 陳麗娟; 周冰; 任湘; 郭小華(湖南大學(xué)化學(xué)化工學(xué)院) |
| 摘 要：采用Li+/MgO催化劑研究了Li含量、反應溫度、原料氣組成對甲烷和甲苯催化氧化交叉偶聯(lián)成乙苯或苯乙烯 (即C8)反應的影響 ,對幾種Li含量催化劑上各影響因素引起的差異進(jìn)行了考察。結果表明 ,其活性中心也主要是Li+O- ,合適的L酸點(diǎn)是本交叉偶聯(lián)反應中反應物的吸附中心 ,Li+O- 和L酸點(diǎn)是決定偶聯(lián)反應產(chǎn)物C2 和C8的主要因素。偶聯(lián)可能主要按游離基機理進(jìn)行 |
| 關(guān)鍵詞：交叉偶聯(lián); 活性中心; 催化劑 |
| 中圖分類(lèi)號：O643.3 文獻標識碼：A 文章編號：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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