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Effect of the Ratio of Precipitated SiO2 to Binder SiO2 on Iron-based Catalysts for Fischer–Tropsch Synthesis

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Abstract

The effects of the ratio of precipitated SiO2 to binder SiO2 (Si(P)/Si(B)) on the reduction, carburization and catalytic behavior of precipitated Fe–Cu–K–SiO2 catalysts for Fischer–Tropsch synthesis (FTS) were investigated by N2 physisorption, temperature-programmed reduction/desorption (TPR/TPD) and Mössbauer effect spectroscopy (MES). FTS performances of the catalysts were tested in a continuous stirred tank reactor (CSTR). It is found that the increase of Si(P)/Si(B) ratio (Si(P)/Si(B) = 0/25 ∼ 15/10) decreases the crystallite size of the catalysts, improves the surface basicity, enhances the reduction and carburization of the catalysts, and increases the activity of the catalyst. However, when Si(P)/Si(B) ratio is further increased (Si(P)/Si(B) = 25/0), the catalyst exhibits a restrained reduction and carburization behavior, which may be attributed to the stronger metal–support interaction. Based on the present work, a catalyst with a suitable ratio of Si(P)/Si(B), for example Si(15)/Si(10) displays an optimal FTS performances.

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Acknowledgements

We gratefully thank the financial support from the Natural Science Foundation of China (20473111), and the National Outstanding Young Scientists Foundation of China (20625620), respectively. This work is also supported by SYNFUELS CHINA.Co., Ltd.

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Authors and Affiliations

  1. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, P.R. China

    Wenjuan Hou, Baoshan Wu, Xia An, Tingzhen Li, Zhichao Tao, Hongyan Zheng, Hongwei Xiang & Yongwang Li

  2. Graduate University of Chinese Academy of Sciences, Beijing, 100039, P.R. China

    Wenjuan Hou, Xia An, Tingzhen Li, Zhichao Tao & Hongyan Zheng

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  1. Wenjuan Hou
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  2. Baoshan Wu
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  3. Xia An
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  4. Tingzhen Li
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  5. Zhichao Tao
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  6. Hongyan Zheng
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  7. Hongwei Xiang
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  8. Yongwang Li
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Correspondence to Yongwang Li.

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Hou, W., Wu, B., An, X. et al. Effect of the Ratio of Precipitated SiO2 to Binder SiO2 on Iron-based Catalysts for Fischer–Tropsch Synthesis. Catal Lett 119, 353–360 (2007). https://doi.org/10.1007/s10562-007-9244-0

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  • DOI: https://doi.org/10.1007/s10562-007-9244-0

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