Effect of the calcination temperature on the structural properties and catalytic activity in the Fe/SiO2 system

被引：0
|
作者：
Gallegos, NG [1 ]
Bengoa, JF [1 ]
Cagnoli, MV [1 ]
Alvarez, AM [1 ]
Mercader, RC [1 ]
Marchetti, SG [1 ]
机构：
[1] Natl Univ La Plata, Fac Ciencias Exactas, Fac Ingn, CONICET,CICBA,CINDECA, RA-1900 La Plata, Argentina
来源：
Industrial Applications of the Mossbauer Effect | 2005年 / 765卷
关键词：
D O I：
暂无
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The structural properties of iron supported catalysts have strong influence on their activity and selectivity in the Fischer-Tropsch synthesis. We have studied the influence of the calcination temperature on the oxide-support interaction degree to reach the highest iron reducibility in Fe/SiO2 system to obtain the highest catalytic activity and selectivity. Silica was impregnated with an aqueous iron solution and it was calcined at 698, 898 and 1098 K. The three precursors were characterized by Mossbauer Spectroscopy, obtaining different iron oxide species on the support. They were reduced in H-2 to produce three catalysts characterized by CO Chemisorption, Volumetric Oxidation and Mossbauer Spectroscopy. The activity and selectivity measurements showed that the calcination temperature increase led to a lower hydrocarbon production, a decrease of olefins production and an increase of methane.
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页码：37 / 42
页数：6
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