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| 论文编号: |
O120090066 |
| 第一作者所在部门: |
610组 |
| 中文论文题目: |
Characterization, activity and selectivity of ethylenediamine modified Co/SiO2 FT catalyst
prepared by sol-gel method
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| 英文论文题目: |
Characterization, activity and selectivity of ethylenediamine modified Co/SiO2 FT catalyst
prepared by sol-gel method
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| 论文题目英文: |
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| 作者: |
王月伦 侯 博 陈建刚贾丽涛 李德宝 孙予罕
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| 论文出处: |
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| 刊物名称: |
Korean Journal of Chemical Engineering
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| 年: |
2009
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| 卷: |
26 |
| 期: |
3 |
| 页: |
850-855 |
| 联系作者: |
孙予罕 |
| 收录类别: |
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| 影响因子: |
0.89
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| 摘要: |
Co/SiO2 catalysts were prepared by sol-gel method with varied en (ethylenediamine)/Co molar ratios under
the same pH. Their physical-chemical properties were compared with those prepared with similar en/Co molar ratios
at natural pH or without adding ethylenediamine. Regardless of pH, the catalysts prepared using ethylenediamine possessed
high microporosity, which led to a better selectivity to C5-18 hydrocarbons, versus the catalyst possessing higher
mesoporosity which showed slightly higher C18+ selectivity. As enough positions in the coordination sphere were blocked
by ethanediamine ligands, the formation of cobalt silicate disfavored for (en/Co=2) catalysts, which resulted in the
higher activity in FT reaction. Whereas the catalysts prepared with lower or higher en/Co molar ratio both showed lower
activity due to the formation of [(SiO)Co(en)(EtOH)3] species or the electronic adsorption of cobalt complexes in the
negatively charged silica surface, respectively. However, for the catalyst without using ethylenediamine, the lowest
activity and the highest CH4 selectivity obtained due to its much lower reducibility. |
| 英文摘要: |
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| 外单位作者单位: |
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| 备注: |
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关闭窗口 |
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