| CO加氢合成甲醇Cu-Mn~(2+)/SiO_2催化剂的研究 |
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| 引用本文： | 李基涛,蔡丽芬,郑国新,李信亮.CO加氢合成甲醇Cu-Mn~(2+)/SiO_2催化剂的研究[J].厦门大学学报(自然科学版),1991(6). |
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| 作者姓名： | 李基涛 蔡丽芬 郑国新 李信亮 |
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| 作者单位： | 厦门大学化学系 物理化学研究所
(李基涛，蔡丽芬，郑国新)，厦门大学化学系 物理化学研究所(李信亮) |
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| 摘 要： | 负载型Cu/SiO_2或Mn/SiO_2催化剂对CO加氢合成甲醇反应的催化活性甚低,而Cu-Mn~(2+)/SiO_2催化剂的催化活性却很高,研究表明,Mn~(2+)的加入使催化剂表面的分散度增大,并可能通过Cu-Mn~(2+)间的有关轨道相互作用或通过Cu、Mn与载体间的氧桥间接发生作用,使催化剂吸附氢和异裂氢的能力增大,为HCOO~-后续加氢提供充足的氢原,从而提高Cu-Mn~(2+)/SiO_2催化剂CO加氢合成甲醇的催化活性。
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| 关 键 词： | Cu-Mn~2/SiO_2催化剂 合成甲醇 |
Study of CO Hydrogenation for Methanol Synthesis over Cu-Mn~(2+)/SiO_2 Catalyst |
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| Li Jitao Cai Lifen Zhen Gonshing Li Shenliang.Study of CO Hydrogenation for Methanol Synthesis over Cu-Mn~(2+)/SiO_2 Catalyst[J].Journal of Xiamen University(Natural Science),1991(6). |
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| Authors: | Li Jitao Cai Lifen Zhen Gonshing Li Shenliang |
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| Abstract: | This paper shows that the dispersion of Cu on SiO2 surface and the activity of Cu-Mn2/SiO2 catalyst, used for methanol synthesis from CO and H2, can be remarkably increased by adding Mn2+ as a promoter. Through the direct interaction of Cu-Mn2+ 3d 4s orbitals or the indirect interaction via the oxygen bridge of Cu-O-Mn2+ ,Mn2+ can also affect Cu valence states, thereby causing partial positive charge on Cu atom. The Cu8+ state is favorable for the heterolytically dissociation adsorption of hydrogen to form adsorbed species of H8- and Hb+. Therefore the promoting effect of Mn2+ on the catalytic activity of Cu-Mn2+/SiO2 may be explained. |
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| Keywords: | Methanol synthesis Cu-Mn2+/SiO2 Catalyst |
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