Citation: ZHANG Feng, SUN Hao, ZHANG Jian-shu, YAN Shuai, QU Xuan, ZHANG Rong, BI Ji-cheng. Effect of dispersion degree of iron on catalytic hydrogasification of coal char[J]. Journal of Fuel Chemistry and Technology, ;2019, 47(4): 402-410. shu

Effect of dispersion degree of iron on catalytic hydrogasification of coal char

ZHANG Feng ¹ ,
SUN Hao ¹ ,
ZHANG Jian-shu ^1,, ,
YAN Shuai ² ,
QU Xuan ² ,
ZHANG Rong ² ,
BI Ji-cheng ²

1.
School of Chemistry and Chemical Engineering/Key Laboratory for Green Process of Chemical Engineering of Xinjiang Bingtuan-Provincial Ministry of Education to Build a National Key Laboratory Breeding Base, Shihezi University, Shihezi 832003, China
2.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China

Corresponding author: ZHANG Jian-shu, zjschem@163.com
Received Date: 6 December 2018
Revised Date: 2 February 2019

Fund Project: The project was supported by the National Natural Science Foundation of China (U1703253)the National Natural Science Foundation of China U1703253

Figures(9)

The effect of dispersibility of Fe on coal chars with different specific surface areas on the catalytic hydrogasification performance was studied in a pressurized fixed bed reactor. The chars and catalysts were characterized by XRD, BET, H₂-TPR, FT-IR, TEM and Raman spectroscopy. The results show that the active site and graphitization degree of coal char are not the only factors affecting the catalytic gasification reaction, but the dispersion of catalyst has a greater impact on the reaction. The larger the specific surface area of coal char is, the more uniform the Fe catalyst disperses on the surface of coal char and the smaller the average grain size of the active component of catalyst is, which can promote the formation of the catalytically hydrogenated mesophase product Fe₃C and methane yield. For 900-char with higher specific surface area, the methane yield can reach 53% when the hydrogen pressure is 2 MPa, the temperature is 750℃ and the Fe loading is 5%. The effect of Fe catalyst loading on the catalytic hydrogasification was investigated with 900-char. It is found that the methane yield increases first and then decreases, and the Fe loading has a saturation point.
- iron,
- hydrogasification,
- catalytic,
- dispersion,
- saturation point
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沈阳化工大学材料科学与工程学院沈阳 110142