Citation: WANG Jue, YANG Yong, QING Ming, BAI Yun-po, WANG Hong, HU Cai-xia, XIANG Hong-wei, YUE Ren-liang. Effect of the promoters on oxidation behavior of Fe-based Fischer-Tropsch catalyst: Deciphering the role of H₂O[J]. Journal of Fuel Chemistry and Technology, ;2020, 48(1): 63-74. shu

Effect of the promoters on oxidation behavior of Fe-based Fischer-Tropsch catalyst: Deciphering the role of H₂O

WANG Jue ^1,2,3 ,
YANG Yong ^2,4 ,
QING Ming ² ,
BAI Yun-po ² ,
WANG Hong ² ,
HU Cai-xia ² ,
XIANG Hong-wei ^2,4,, ,
YUE Ren-liang ³

1.
University of Chinese Academy of Sciences, Beijing 100049, China
2.
Synfuels China Co. Ltd., Beijing 101407, China
3.
Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
4.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China

Corresponding author: XIANG Hong-wei, hwxiang@sxicc.ac.cn
Received Date: 24 September 2019
Revised Date: 27 November 2019

Figures(10)

The effect of carburization and reduction degree on H₂O oxidation behaviour for the iron carbides in Fe-based FTS catalyst were firstly investigated using a combination method including X-ray diffraction (XRD), Raman and temperature-programmed-hydrogenation (TPH). The relationship between carbon species transformation and H₂O oxidation behaviour of iron carbides was investigated simultaneously. Based on these observations, the influence of typical promoters like K and SiO₂ on the structure and H₂O oxidation behaviour of Fe-based FTS catalysts was further studied. The results indicated that, for the iron catalyst, the stability of iron carbides against H₂O oxidation was increased with the increase of iron carbides content, and the H₂O oxidation process led to the formation of more graphitic carbon. The carburization ability was effectively enhanced when certain amount of K promoter was incorporated. Addition of K into Fe-based FTS catalyst increased the number of graphitic carbons, which increased the stability of iron carbides toward H₂O oxidation ultimately. It was also found that promotion of SiO₂ greatly degraded the carburization degree of the catalyst, while their tendency to be oxidized to form Fe₃O₄ in the H₂O atmosphere was obviously hindered.
- Fischer-Tropsch synthesis,
- iron-based catalysts,
- H₂O oxidation,
- stability of iron carbide,
- promoter
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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Effect of the promoters on oxidation behavior of Fe-based Fischer-Tropsch catalyst: Deciphering the role of H2O

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通讯作者: 陈斌, bchen63@163.com

Effect of the promoters on oxidation behavior of Fe-based Fischer-Tropsch catalyst: Deciphering the role of H₂O