DOI QR코드

DOI QR Code

Characterization of CO2 Adsorption Process for a Water Removal from Coal

석탄 내 수분 제거를 위한 CO2 흡착 효과에 대한 연구

  • SEUNGTAEK LEE (School of Mechanical Engineering, Pusan National University) ;
  • HAKDEOK KIM (School of Mechanical Engineering, Pusan National University) ;
  • JUHUN SONG (School of Mechanical Engineering, Pusan National University)
  • 이승택 (부산대학교 기계공학부) ;
  • 김학덕 (부산대학교 기계공학부) ;
  • 송주헌 (부산대학교 기계공학부)
  • Received : 2024.01.08
  • Accepted : 2024.04.04
  • Published : 2024.04.30

Abstract

In this study, the extent of water removal in the high-moisture coal was measured. The simplified adsorption model was developed to predict the extent of water removal. The water removal was observed to increase up to 25% at saturation condition of 25℃. The modeling work shows that adsorption contributes the water removal only by 3%, whereas other factors such as CO2 solubility and wettability would be responsible for the water removal.

Keywords

Acknowledgement

이 논문은 부산대학교 기본연구지원사업(2년)에 의하여 연구되었음.

References

  1. H. Kim, J. Choi, H. Lim, and J. Song, "Enhanced combustion processes of liquid carbon dioxide (LCO2)-low rank coal slurry at high pressures", Energy, Vol. 237, 2021, pp. 121566, doi: https://doi.org/10.1016/j.energy.2021.121566. 
  2. H. Kim, J. Choi, H. Lim, and J. Song, "Liquid carbon dioxide drying and subsequent combustion behavior of high-moisture coal at high pressure", Applied Thermal Engineering, Vol. 207, 2022, pp. 118182, doi: https://doi.org/10.1016/j.applthermaleng.2022.118182. 
  3. X. Sun, Y. Yao, D. Liu, and Y. Zhou, "Investigations of CO2-water wettability of coal: NMR relaxation method", International Journal of Coal Geology, Vol. 188, 2018, pp. 38-50, doi: https://doi.org/10.1016/j.coal.2018.01.015. 
  4. X. Sun, Y. Yao, D. Liu, D. Elsworth, and Z. Pan, "Interactions and exchange of CO2 and H2O in coals: an investigation by low-field NMR relaxation", Scientific Reports, Vol. 6, 2016, pp. 19919, doi: https://doi.org/10.1038/srep19919. 
  5. Y. Song, Q. Zou, E. Su, Y. Zhang, and Y. Sun, "Changes in the microstructure of low-rank coal after supercritical CO2 and water treatment", Fuel, Vol. 279, 2020, pp. 118493, doi: https://doi.org/10.1016/j.fuel.2020.118493. 
  6. Y. Song, W. Xing, Y. Zhang, W. Jian, Z. Liu, and S. Liu, "Adsorption isotherms and kinetics of carbon dioxide on Chinese dry coal over a wide pressure range", Adsorption, Vol. 21, 2015, pp. 53-65, doi: https://doi.org/10.1007/s10450-015-9649-9. 
  7. S. Ottiger, R. Pini, G. Storti, M. Mazzotti, R. Bencini, F. Quattrocchi, G. Sardu, and G. Deriu, "Adsorption of pure carbon dioxide and methane on dry coal from the sulcis coal province (SW Sardinia, Italy)", Environmental Progress, Vol. 25, No. 4, 2006, pp. 355-364, doi: https://doi.org/10.1002/ep.10169. 
  8. X. Tang and N. Ripepi, "High pressure supercritical carbon dioxide adsorption in coal: adsorption model and thermody namic characteristics", Journal of CO2 Utilization, Vol. 18, 2017, pp. 189-197, doi: https://doi.org/10.1016/j.jcou.2017.01.011. 
  9. H. Kim, J. Choi, H. Lim, and J. Song, "Effect of moisture release on radiation behavior of burning coal bed between enclosed confined surfaces", Journal of Quantitative Spectroscopy and Radiative Transfer, Vol. 308, 2023, pp. 108679, doi: https://doi.org/10.1016/j.jqsrt.2023.108679. 
  10. H. Kim, S. Lee, H. Lim, and J. Song, "Dependence of radiance of burning coal bed on ash formation and dew condensation", Journal of Heat and Mass Transfer, Vol. 146, No. 6, 2024, pp. 061602, doi: https://doi.org/10.1115/1.4064667. 
  11. E. W. Lemmon, M. L. Huber, M. O. McLinden, and I. Bell, "Reference fluid thermodynamic and transport properties database (REFPROP)", National Institute of Standards and Technology, 2021. Retrieved from https://www.nist.gov/programs-projects/reference-fluid-thermodynamic-and-transport-properties-database-refprop. 
  12. R. Wiebe, "The binary system carbon dioxide-water under pressure", Chemical Reviews, Vol. 29, No. 3, 1941, pp. 475-481, doi: https://doi.org/10.1021/cr60094a004. 
  13. J. Song, H. Kim, and C. Kim, "Spray characteristics of a coal slurry with liquid carbon dioxide", Journal of Hydrogen and New Energy, Vol. 26, No. 4, 2015, pp. 357-362, doi: https://doi.org/10.7316/KHNES.2015.26.4.357.