| Na－KOH－MgO系列催化剂的合成与脱氢活性 |
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| 引用本文： | 肖小明,陈军,王静.Na－KOH－MgO系列催化剂的合成与脱氢活性[J].湖南师范大学自然科学学报,1996(4). |
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| 作者姓名： | 肖小明 陈军 王静 |
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| 作者单位： | 湖南师范大学化学系 |
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| 摘 要： | 采用浸债和混炼等方法制备了Ｎａ－ＭｇＯ，ＫＯＨ－ＭｇＯ和Ｎａ－ＫＯＨ－ＭｇＯ系列固体超强碱催化剂．微反脉冲法考察了各催化剂对乙醇脱氢反应的催化活性．结果表明金属Ｎａ的掺入明显改善脱氢活性．各系列催化剂的脱氢活性顺序为Ｎａ－ＫＯＨ－ＭｇＯ＞Ｎａ－ＭｇＯ＞ＫＯＨ－ＭｇＯ＞ＭｇＯ，催化剂的预处理温度高于７２３Ｋ时，脱氢活性呈下降趋势．
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| 关 键 词： | 碱催化剂，脱氢，乙醇，氧化镁 |
Preparation of Na-KOH-MgO Seriees Catalysts and Their Catalytic Activity for Dehydrogenation of Ethanol |
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| Xiao Xiaoming, Chen Jun, Wang Jing.Preparation of Na-KOH-MgO Seriees Catalysts and Their Catalytic Activity for Dehydrogenation of Ethanol[J].Journal of Natural Science of Hunan Normal University,1996(4). |
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| Authors: | Xiao Xiaoming Chen Jun Wang Jing |
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| Abstract: | A series of catalysts, Na-MgO, KOH-MgO and Na-KOH-MgO, were prepared with impregnating and milling methods. The catalytic activity for dehydrogenation of ethanol were exaimined over a microreactor between 523 K and 623 K. The results indicated that sodium was of apparent promotional effect to MgO. The catalytic activity was in the order: Na-KOH-MgO > Na-MgO > KOH-MgO > MgO, and decreased with calcining temperature uper over 723 K. Active site for dehydrogenation was to be proposed involving the coordinatively unsaturated O and OH- on the surface of these catalysts. |
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| Keywords: | base catalyst dehydrogenation ethanol magnesium oxide |
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