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Gas Adsorption–Desorption Properties of Coal

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Coal Mechanics

Abstract

Adsorption is a type of interfacial phenomena, which includes physical adsorption, chemical adsorption and absorption. The gas adsorption in coal belongs to physical adsorption, which means that the gas molecules concentrate in the surface of coal pores, i.e. the gas molecule concentration at the interface between gas and coal is larger than elsewhere. For the physical adsorption, the adsorption force between the solid surface and the gas is the van der Waals force, and the adsorption volume depends mainly on the pressure, temperature and the size of coal surface area. Similar to the gas liquefaction and water vapor condensation, physical adsorption is also reversible. The heat released by gas adsorption is small, and generally, there is about 10–20 kJ of heat released when 1 mol of gas molecules are adsorbed, which is similar to that of gas liquefaction. For the chemical adsorption, chemical bonds are formed between the solid molecule and the gas molecule on the solid surface, i.e. there exists electron exchange between gas molecules and solid surface molecules. The main difference between chemical adsorption and physical adsorption is that the chemical adsorption is irreversible, and the generated heat of chemical adsorption is similar to the thermal effect of chemical reaction, which is generally ten times to several tens of times larger than the physical adsorption heat. A large number of experiments on coal adsorption show that the gas adsorption/desorption in coal is a reversible process and the volume of adsorbed gas is approximately the same as the desorbed gas. The gas adsorption heat measured by experiments ranges from 12.6 to 20.9 kJ/moL, which is approximately equal to the heat released by methane liquefaction.

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References

  1. Yang, R. T., & Saunders, J. T. (1985). Adsorption of gases on coals and heattreated coals at elevated temperature and pressure: 1. Adsorption from hydrogen and methane as single gases. Fuel, 64(5), 616–620.

    Google Scholar 

  2. Zwietering, P., & Van Krevelen, D. W. (1954). Chemical structure and properties of coal IV-Pore structure. Fuel, 33(3), 331–337.

    Google Scholar 

  3. Moffat, D. H., & Weale, K. E. (1955). Sorption by coal of methane at high pressures. Fuel, 34(4), 449–462.

    Google Scholar 

  4. Gu, T. R., & Zhu, B. Y. (2001). Surface chemistry. Science press. (in Chinese).

    Google Scholar 

  5. Cui, Y. J., Zhang, Q. L., & Yang, X. L. (2003). The adsorption properties of coal and the variation of the equivalent adsorption heat. Natural Gas Industry, 23(4), 130–131. (in Chinese).

    Google Scholar 

  6. Wang, F. (2016). Kinetics characteristic of methane adsorption/desorption in coal and its application in the rapid determination of methane parameters. China University of Mining and Technology. (in Chinese).

    Google Scholar 

  7. Cheng, Y. P., Jiang, H. N., & Zhang, X. L. (2017). Effects of coal rank on physicochemical properties of coal and on methane adsorption. Journal of Coal Science and Engineering.

    Google Scholar 

  8. Cheng, Y. P., Wang, H. F., Wang, L., et al. (2012). Theories and engineering applications on coal mine gas control. China University of Mining and Technology Press. (in Chinese).

    Google Scholar 

  9. Wang, L. G. (2013). Experiment studies on displacing deep coalbed CH4 by gas injection and characteristic trace after displacement. China University of Mining and Technology. (in Chinese).

    Google Scholar 

  10. Zhong, L. W., & Zhang, X. M. (1990). The adsorption capacity of coal and the relation to the metamorphic degree and components of coal. Coal Geology and Exploration, 4, 29–35. (in Chinese).

    Google Scholar 

  11. Yu, B. F., & Wang, Y. A. (2000). Technical manual for coal mine gas disaster prevention and utilization. China Coal Industry Publishing House. (in Chinese).

    Google Scholar 

  12. Yu, Q. X. (2012). Coal mine gas control. China University of Mining and Technology Press. (in Chinese).

    Google Scholar 

  13. Zhang, L., He, X. Q., & Nie, B. S. (2000). Research on the adsorption process of coal on the gas. Mining Safty and Environmental Protection, 27(6), 1–2. (in Chinese).

    Google Scholar 

  14. Wang, Z. F. (2001). Study on the cas desorption law of coal in the medium of air, water and mud and its application. China University of Mining and Technology. (in Chinese).

    Google Scholar 

  15. Yang, Q. L. (1987). Experimental study on the gas desorption law in coal dust. Safety in Coal Mines, 18(2), 9–16. (in Chinese).

    Google Scholar 

  16. Wang, Z. F. (1998). Study on the method of determining the gas permeability coefficient in coal seam through the permeability of coal particles. Safety in Coal Mines, 29(6), 3–5. (in Chinese).

    Google Scholar 

  17. Joubert, J. I., Grein, C. T., & Bienstock, D. (1973). Sorption of methane in moist coal. Fuel, 52(3), 181–185.

    Article  Google Scholar 

  18. Levine, J. R., & Johnson, P. (1993). High pressure microbalance sorption studies. In International Coalbed Methane Symposium (pp. 187–195).

    Google Scholar 

  19. Clarkson, C. R., & Bustin, R. M. (2000). Binary gas adsorption/desorption isotherms: Effect of moisture and coal composition upon carbon dioxide selectivity over methane. International Journal of Coal Geology, 42(4), 241–271.

    Article  Google Scholar 

  20. Chen, X. J. (2013). Impact of injected water on kinetics characteristics of methane desorption in coal. China University of Mining and Technology. (in Chinese).

    Google Scholar 

  21. Barrer, R. M. (1951). Diffusion in and through solids. Cambridge University Press.

    Google Scholar 

  22. Winter, K., & Janas, H. (1959). Gas emission characteristics of coal and methods of determining the desorbable gas content by means of desorbometers. In XIV International Conference of Coal Mine Safety Research.

    Google Scholar 

  23. A.Э.ПETPOCЯH. (1983). Coal mine gas emission. China Coal Industry Publishing House. (in Chinese).

    Google Scholar 

  24. Airey, E. M. (1968). Gas emission from broken coal. An experimental and theoretical investigation. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts, 5(6), 475–494.

    Google Scholar 

  25. Bolt, B. A., & Jinnes, J. A. (1959). Diffusion of Carbon dioxide from coal. Fuel, 38, 333–337.

    Google Scholar 

  26. Wang, Y. A., & Yang, S. J. (1980). Some characteristics of coal seam with the risk of coal and gas outburst. International Journal of Coal Science and Technology, 01, 47–53. (in Chinese).

    Google Scholar 

  27. Sun, C. X. (1983). Study on the desorbed coal gas emission and the gas desorption characteristics of coal in the coal seam with risk of coal and gas outburst. Chongqing Research Institute. (in Chinese).

    Google Scholar 

  28. Kissell, F. N., McCulloch, C. M., & Elder, C. H. (1973). The direct method of determining methane content of coalbeds for ventilation design. US Bur. Mines. Rep. Invest, 7767: 17.

    Google Scholar 

  29. Williams, D. M., & Smith, F. L. (1984). Diffusion models for gas production from coals. Fuel, 63, 251–255.

    Article  Google Scholar 

  30. Smith, D. M., & Williams, F. L. (1981). New technique for determining the methane content of coal. In Proceedings of the Intersociety Energy Conversion Engineering Conference.

    Google Scholar 

  31. Zhang, Y. (2008). Geochemical kinetics. Princeton University Press.

    Google Scholar 

  32. Wu, S. Y. (2005). Research of methane-coalbed coupling movement theory and its application——Gas solid Coupling movement theory with adsorption. Northeastern University. (in Chinese).

    Google Scholar 

  33. Guo, H., Cheng, Y., Ren, T., et al. (2016). Pulverization characteristics of coal from a strong outburst-prone coal seam and their impact on gas desorption and diffusion properties. Journal of Natural Gas Science and Engineering, 33, 867–878.

    Article  Google Scholar 

  34. Liu, Q. Q., Cheng, Y. P., Zhou, H. X., et al. (2015). A mathematical model of coupled gas flow and coal deformation with gas diffusion and klinkenberg effects. Rock Mechanics and Rock Engineering, 48(3), 1163–1180.

    Article  Google Scholar 

  35. Guo, H., Cheng, Y., Yuan, L., et al. (2016). Unsteady-state diffusion of gas in coals and its relationship with coal pore structure. Energy Fuels.

    Google Scholar 

  36. Yang, Q. L., & Wang, Y. A. (1986). Theory of methane diffusion from coal cuttings and its application. Journl of China Coal Society, 8(3), 87–94. (in Chinese).

    Google Scholar 

  37. Yang, Q. L., & Wang, Y. (1988). Mathematical simulation of the radial methane flow in spherical coal grains. Journal of China University of Mining and Technology, 3, 58–64. (in Chinese).

    Google Scholar 

  38. Shi, G. S., & Wei, F. Q. (2014). Theoretical analysis of factors influencing the gas desorption index K1 of drilling cutting. Journal of Safety and Environment, 14(5), 8–10. (in Chinese).

    Google Scholar 

  39. Shao, J. (1991). Discuss on the gas desorption index K1 of drilling cutting. Safety in Coal Mines, 3, 34–39. (in Chinese).

    Google Scholar 

  40. Zhao, X. S., & Liu, S. (2002). Influencing factor on measure error of the gas desorption index K1 of drilling cutting. Mining Safety and Environmental Protection, 29(2), 3–5. (in Chinese).

    Google Scholar 

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Authors and Affiliations

  1. School of Safety Engineering, China University of Mining and Technology, Xuzhou, Jiangsu, China

    Yuanping Cheng & Qingquan Liu

  2. School of Civil, Mining and Environmental, University of Wollongong, Wollongong, NSW, Australia

    Ting Ren

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  1. Yuanping Cheng
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  2. Qingquan Liu
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  3. Ting Ren
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Correspondence to Yuanping Cheng .

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Cheng, Y., Liu, Q., Ren, T. (2021). Gas Adsorption–Desorption Properties of Coal. In: Coal Mechanics. Springer, Singapore. https://doi.org/10.1007/978-981-16-3895-4_4

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  • DOI: https://doi.org/10.1007/978-981-16-3895-4_4

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