摘要
The structure of Fe-M ultrafine particle catalysts was investigated by in situ Mossbauer spectroscopy. Emphasis has particularly been put on the effect of the second metal component. It was found that the incorporation of second metal component hinders the reduction and carburization of iron- containing phase in the presence of H2 and CO, and the degree of hindrance is in the order of Mg】Mn】Zn due to the interaction between iron and the second metal component. Consequently, the formation of light olefinic products is in the order of Fe- Mg】 Fe- Mn】 Fe- Zn catalysts consistent with the F-T synthesis performance.
The structure of Fe-M ultrafine particle catalysts was investigated by in situ Mossbauer spectroscopy. Emphasis has particularly been put on the effect of the second metal component. It was found that the incorporation of second metal component hinders the reduction and carburization of iron- containing phase in the presence of H2 and CO, and the degree of hindrance is in the order of Mg>Mn>Zn due to the interaction between iron and the second metal component. Consequently, the formation of light olefinic products is in the order of Fe- Mg> Fe- Mn> Fe- Zn catalysts consistent with the F-T synthesis performance.
基金
The Project Supported by National Natural Science Foundation of China
