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Coal structure change by ionic liquid pretreatment for enhancement of fixed-bed gasification with steam and CO2

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Abstract

An innovative pretreatment of Indonesian low-rank coal (ILRC) by 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) ionic liquid (IL) was conducted. The obtained IL pretreated coal had a loose and porous structure. Fourier transform infrared spectroscopy (FTIR) and Brunauer-Emmett-Teller (BET) analysis showed that pretreated ILRC had a stronger absorption ability and an increased average pore size (from 23.6 to 51.8 nm). Steam-coal gasification was conducted to explore the effect of coal pretreatment. The result showed that 1.63-times more hydrogen was generated from pretreated coal compared to original (i.e., untreated) coal, and carbon conversion (X c ) increased from 89.03 to 97.25%. During CO2 coal gasification, IL pretreated coal had a greater CO2 consumption potential and generated more CO. The chemical exergy of syngas of the pretreated coal gasification was higher than that of the untreated coal gasification with CO2 at 900 °C. In addition, pretreated coal emitted less CO2 than untreated coal at 900 °C.

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Author notes

  1. These authors equally contributed to this work.

Authors and Affiliations

  1. Department of Energy Systems Research, Ajou University, Woncheon-dong, Youngtong-gu, Suwon, 16499, Korea

    Sang-phil Yoon, Shumin Fan, Tae-Jin Kang & Hyung-Taek Kim

  2. Department of Chemical Engineering, McMaster University, Hamilton, Ontario, L8S 4L8, Canada

    Lingyan Deng

  3. Key Laboratory of Coal Gasification and Energy Chemical Engineering of Ministry of Education, East China University of Science and Technology, Shanghai, 200237, P. R. China

    Hueon Namkung

Authors
  1. Sang-phil Yoon
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  2. Lingyan Deng
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  3. Hueon Namkung
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  4. Shumin Fan
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  5. Tae-Jin Kang
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  6. Hyung-Taek Kim
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Correspondence to Hyung-Taek Kim.

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5th International Conference on Gasification and Its Application.

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Yoon, Sp., Deng, L., Namkung, H. et al. Coal structure change by ionic liquid pretreatment for enhancement of fixed-bed gasification with steam and CO2. Korean J. Chem. Eng. 35, 445–455 (2018). https://doi.org/10.1007/s11814-017-0296-6

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  • DOI: https://doi.org/10.1007/s11814-017-0296-6

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