| Mn/BaCO3催化剂上乙腈与甲醇选择性合成丙烯腈的研究 |
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| 引用本文： | 赵建军,钟依均,谢云龙,罗孟飞.Mn/BaCO3催化剂上乙腈与甲醇选择性合成丙烯腈的研究[J].科技通报,2005,21(6):637-640,643. |
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| 作者姓名： | 赵建军 钟依均 谢云龙 罗孟飞 |
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| 作者单位： | 浙江师范大学,物理化学研究所,浙江,金华,321004;浙江师范大学,物理化学研究所,浙江,金华,321004;浙江师范大学,物理化学研究所,浙江,金华,321004;浙江师范大学,物理化学研究所,浙江,金华,321004 |
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| 基金项目： | 浙江省自然科学基金资助项目（RC00043）和教育部科技研究重点项目（地方01045） |
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| 摘 要： | 采用X射线衍射（XRD）和程序升温脱附（TPD）考察了Mn／BaCO3、Mn／KCl-BaCO3和Mn／CeO2-BaCO3催化剂的物相及其表面酸碱性；同时考察了乙腈与甲醇选择性合成丙烯腈的催化性能。结果表明，随着Mn负载量的增加，Mn／BaCO3催化剂对乙腈甲基化制丙烯腈的活性呈提高趋势，其中Mn（20％）／BaCO3催化剂对丙烯腈的选择性最高，收率最大。添加CeO2、KCl对催化剂的活性和选择性均起到抑制作用。NH3-TPD、CO2-TPD结果表明，加入CeO2和KCl后，催化剂表面的酸中心数目与碱中心数目都有所减少，表明催化剂的活性与表面酸碱性有着密切的联系。
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| 关 键 词： | 物理化学 Mn/BaCO3催化剂 丙烯腈 乙腈 选择性 活性 |
| 文章编号： | 1001-7119（2005）06-0637-04 |
| 收稿时间： | 2004-07-05 |
| 修稿时间： | 2004-07-05 |
Selective Synthesis of Acrylonitrile from Acetonitrile and Methanol over Mn/BaCO3 Catalysts |
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| ZHAO Jian-Jun,ZHONG Yi-Jun,XIE Yun-Long,LUO Meng-Fei.Selective Synthesis of Acrylonitrile from Acetonitrile and Methanol over Mn/BaCO3 Catalysts[J].Bulletin of Science and Technology,2005,21(6):637-640,643. |
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| Authors: | ZHAO Jian-Jun ZHONG Yi-Jun XIE Yun-Long LUO Meng-Fei |
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| Institution: | Institute of Physical Chemistry, Zhejiang Normal University, Jinhua 321004, China |
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| Abstract: | The phase and the surface acidity and basicity of Mn/BaCO3,Mn/KCl-Ba CO3 and Mn/CeO2-BaCO3 catalysts were investigated by using of XRD and TPD,and their catalytic performance for the synthesis of acrylonitrile from acetonitrile and methanol was studied.It was found that the Mn(20%)/BaCO3 catalyst exhibited the highest yield and selectivity to acrylonitrile.The conversion of acetonitr ile and the selectivity to acrylonitrile decrease when CeO2 or KCl are added to BaCO3.The NH3-TPD and CO2-TPD results indicate that the surface acid sites and basic sites of the catalysts decrease after the addition of CeO2 or KCl.Therefo re,the activity of Mn/BaCO3 attributes to the co-operation of the acid sites and basic sites of the catalysts surface. |
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| Keywords: | physical chemistry Mn/BaCO3catalysts acrylonitrile acetonitrile selectivity activity |
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