|
|
| 论文编号: |
122214O120120312 |
| 第一作者所在部门: |
610组 |
| 中文论文题目: |
Fischer-Tropsch synthesis over ordered mesoporous carbon supported cobalt catalysts: the role of amount of carbon precursor in catalytic performance
|
| 英文论文题目: |
Fischer-Tropsch synthesis over ordered mesoporous carbon supported cobalt catalysts: the role of amount of carbon precursor in catalytic performance
|
| 论文题目英文: |
|
| 作者: |
杨轶飞
|
| 论文出处: |
|
| 刊物名称: |
Catalysis letter
|
| 年: |
2012
|
| 卷: |
142 |
| 期: |
2 |
| 页: |
195-204 |
| 联系作者: |
|
| 收录类别: |
|
| 影响因子: |
2.242
|
| 摘要: |
Ordered mesoporous carbon supported cobaltbased
catalysts (Co/MC) were synthesized via incipient
wetness impregnation with different amounts of furfuryl
alcohol (FA) as carbon precursor. The characterizations of
obtained Co/MC were subjected to N2 adsorption, XRD,
XPS, TEM, H2-TPR, H2-TPD and H2-TPSR. The results
indicate that the reducibility and dispersion of Co active
species vary significantly due to the difference of FA
amount. By simply tuning the FA content from 25 to
100 wt%, the reduction temperature of deriving metallic
Co shifts gradually to lower. The catalytic performance of
Co/MC was evaluated for Fischer–Tropsch (FT) synthesis.
The observed FT activity exhibits a volcano-type curve
with the amount of FA due to the effect of both reducibility
and dispersion of active species. As the precursor concentration
overweighs 50 wt%, the ability of CO to
dissociate over the active surface and the selectivity to
the C5? products level off after experiencing an
initial increase. Substantially, the catalysts with higherconcentration of FA render the larger crystallites having an
average size of more than 6 nm, which facilitates the CO
hydrogenation by way of carbon chain propagation. It
seems that the sample with FA content of 50 wt% is
optimum in terms of FT activity and C5? selectivity. |
| 英文摘要: |
|
| 外单位作者单位: |
|
| 备注: |
|
关闭窗口 |
|
|
|
