| 合成气制乙醇铑催化剂中助剂的作用 |
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| 引用本文： | 傅锦坤 刘金波. 合成气制乙醇铑催化剂中助剂的作用[J]. 厦门大学学报(自然科学版), 1992, 31(4): 387-391 |
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| 作者姓名： | 傅锦坤 刘金波 |
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| 作者单位： | 厦门大学化学系，厦门大学固体表面物理化学国家重点实验室 |
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| 摘 要： | 促进型铑催化剂上,测定CO吸附的IR光谱和铑的分散度,结果表明:线吸附CO的谱带基本不变,桥CO谱带红移且变宽。变化顺序为Rh-Mn>Rb-Mn-Fe-Li>Rh-Fe>Rh-Li>Rh。该变化归因于助剂对吸附CO氧端络合而形成的η~2-CO物种,并可作为活性中心亲氧能力强弱的相对尺度,Rh·Mn/SiO_2上,测量CO/H_2的IR光谱,发现了归属于甲酰基的谱带;说明甲酰基是反应中间物,并测定各催化剂活性和选择性,基于这些结果和蔡启瑞等曾提出的氢助解离乙烯酮机理,能较合理地探讨了助剂的协合催化作用,本研究再次为上述机理提供另一重要实验证据。
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| 关 键 词： | CO吸附 铑催化剂 乙醇 助剂 |
Promotion of Promoted Rh Catalysts in Syngas Conversion to Ethanol |
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| Fu Jinkung Liu Jinpo Xu Jinlia Wang Haiyou Tsai Khirui. Promotion of Promoted Rh Catalysts in Syngas Conversion to Ethanol[J]. Journal of Xiamen University(Natural Science), 1992, 31(4): 387-391 |
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| Authors: | Fu Jinkung Liu Jinpo Xu Jinlia Wang Haiyou Tsai Khirui |
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| Abstract: | For Promoted Rh-Catalysts, IR bands of adsorbed CO and Rh dispersions were examined. Results reavel that IR bands of bridging CO shift down and broaden in the following sequence :Rh-Mn>Rb-Mn-Fe-Li>Rh-Fe>-Rh-Li>Rh. This could be used as a measurement of ox-ophility of catalysts. A formyl adspecies was detected by IR on very oxophilic metal, Mn, promotedcatalyst. By based on these results. promoted effects and mechanism of syngas conversion to ethano! were discussed. |
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| Keywords: | CO adsorption Rh catalyst EtOH FTIR |
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