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Thermogravimetric analysis of gasification reactivity of coal chars with steam and CO2 at moderate temperatures

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Abstract

Comparative study on the gasification reactivity of the three types of Chinese coal chars with steam and CO2 at 850–1050 °C was conducted by isothermal thermogravimetric analysis. The effects of coal rank, pore structure, ash behavior, and gasification temperature on the gasification reactivity of coal chars were investigated. It is found that the gasification reactivity difference between different coal chars changes with reaction degree and gasification temperature, and has no immediate connection with coal rank and initial pore structure. Ash behavior plays an important role in the char reactivity, and changes with gasification temperature and reaction degree due to the variation in the compositions and relative amount. The influence of pore structure is more noticeable during a relatively moderate reaction process. The relative reactivity ratio of steam to CO2 gasification generally decreases with the increasing temperature, and is related with the catalytic effect of inherent minerals. The characteristic parameters of the chars were analyzed, finding that the value of half reaction specific rate is approximate to the average specific rate under the same conditions. The nth-order distributed activation energy model is proposed to describe the coal char gasification process, and the results show that the activation energy increases with the increasing carbon conversion.

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References

  1. Fan XX, Lu QG, Na YJ, Liu Q. Gasification experiments in dual fluidized beds. Proceedings of original papers, Ninth China-Japan symposium. Beijing. 2006;9:263–8.

    Google Scholar 

  2. Fang M, Luo Z, Li X, Wang Q, Ni M, Cen K. A multi-product cogeneration system using combined coal gasification and combustion. Energy. 1998;23:203–12.

    Google Scholar 

  3. Beamish BB, Shaw KJ, Rodgers KA, Newman J. Thermogravimetric determination of the carbon dioxide reactivity of char from some New Zealand coals and its association with the inorganic geochemistry of the parent coal. Fuel Process Technol. 1998;53:243–53.

    Article  CAS  Google Scholar 

  4. Li CZ. Some recent advances in the understanding of the pyrolysis and gasification behaviour of Victorian brown coal. Fuel. 2007;86:1664–83.

    Article  CAS  Google Scholar 

  5. Cioablǎ AE, Tordai GT, Rotaru P, Socaciu M, Ionel I. Experimental approach of co-firing and anaerobic fermentation of biomass and coal, and their thermochemical properties. J Therm Anal Calorim. 2012;110:395–403.

    Article  Google Scholar 

  6. Sarwar A, Khan MN, Azhar KF. Kinetic studies of pyrolysis and combustion of Thar coal by thermogravimetry and chemometric data analysis. J Therm Anal Calorim. 2012;109:97–103.

    Article  CAS  Google Scholar 

  7. Nowak B, Karlström O, Backman P, Brink A, Zevenhoven M, Voglsam S, Winter F, Hupa M. Mass transfer limitation in thermogravimetry of biomass gasification. J Therm Anal Calorim. doi: 10.1007/s10973-012-2400-9.

  8. Rotaru A. Thermal analysis and kinetic study of Petroşani bituminous coal from Romania in comparison with a sample of Ural bituminous coal. J Therm Anal Calorim. doi: 10.1007/s10973-011-2022-7.

  9. Kozlov A, Svishchev D, Donskoy I, Keiko AV. Thermal analysis in numerical thermodynamic modeling of solid fuel conversion. J Therm Anal Calorim. 2012;109:1311–7.

    Article  CAS  Google Scholar 

  10. Irfan MF, Usman MR, Kusakabe K. Coal gasification in CO2 atmosphere and its kinetics since 1948: a brief review. Energy. 2011;36:12–40.

    Article  CAS  Google Scholar 

  11. Sharma A, Takanohashi T, Morishita K, Takarada T, Saito I. Low temperature catalytic steam gasification of HyperCoal to produce H2 and synthesis gas. Fuel. 2008;87:491–7.

    Article  CAS  Google Scholar 

  12. Wu SY, Gu J, Zhang X, Wu YQ, Gao JS. Variation of carbon crystalline structures and CO2 gasification reactivity of shenfu coal chars at elevated temperatures. Energy Fuels. 2008;22:199–206.

    Article  CAS  Google Scholar 

  13. Zong N, Liu Y. Learning about the mechanism of carbon gasification by CO2 from DSC and TG data. Thermochim Acta. 2012;527:22–6.

    Article  CAS  Google Scholar 

  14. Sekine Y, Ishikawa K, Kikuchi E, Matsukata M, Akimoto A. Reactivity and structural change of coal char during steam gasification. Fuel. 2006;85:122–6.

    Article  CAS  Google Scholar 

  15. Molina-Sabio M, González MT, Rodriguez-Reinoso F, Sepúlveda-Escribano A. Effect of steam and carbon dioxide activation in the micropore size distribution of activated carbon. Carbon. 1996;34:505–9.

    Article  CAS  Google Scholar 

  16. Molina A, Mondragon F. Reactivity of coal gasification with steam and CO2. Fuel. 1998;77:1831–9.

    Article  CAS  Google Scholar 

  17. Everson RC, Neomagus HWJP, Kaitano R, Falcon R, du Cann VM. Properties of high ash coal-char particles derived from inertinite-rich coal: II. Gasification kinetics with carbon dioxide. Fuel. 2008;87:3403–8.

    Article  CAS  Google Scholar 

  18. Ahn DH, Gibbs BM, Ko KH, Kim JJ. Gasification kinetics of an Indonesian sub-bituminous coal-char with CO2 at elevated pressure. Fuel. 2001;80:1651–8.

    Article  CAS  Google Scholar 

  19. Pitt GJ. The kinetics of the evolution of volatile products from coal. Fuel. 1962;41:267–74.

    CAS  Google Scholar 

  20. Braun RL, Burnham AK. Analysis of chemical reaction kinetics using a distribution of activation energies and simpler models. Energy Fuels. 1987;1:153–61.

    Article  CAS  Google Scholar 

  21. Burnham AK. An nth-order Gaussian energy distribution model for sintering. Chem Eng J. 2005;108:47–50.

    Article  CAS  Google Scholar 

  22. Liu X, Li B, Miura K. Analysis of pyrolysis and gasification reactions of hydrothermally and supercritically upgraded low-rank coal by using a new distributed activation energy model. Fuel Process Technol. 2001;69:1–12.

    Article  CAS  Google Scholar 

  23. Cakal GÖ, Yücel H, Gürüz A G. Physical and chemical properties of selected Turkish lignites and their pyrolysis and gasification rates determined by thermogravimetric analysis. Anal Appl Pyrolysis. 2007;80:262–8.

    Google Scholar 

  24. Tancredi N, Cordero T, Rodríguez-Mirasol J, Rodríguez JJ. CO2 gasification of eucalyptus wood chars. Fuel. 1996;75:1505–8.

    Article  CAS  Google Scholar 

  25. Zou JH, Zhou ZJ, Wang FC, Zhang W, Dai ZH, Liu HF, Yu ZH. Modeling reaction kinetics of petroleum coke gasification with CO2. Chem Eng Process. 2007;46:630–6.

    Article  CAS  Google Scholar 

  26. Bayarsaikhan B, Hayashi J, Shimada T, Sathe C, Li CZ, Tsutsumi A, Chiba T. Kinetics of steam gasification of nascent char from rapid pyrolysis of a Victorian brown coal. Fuel. 2005;84:1612–21.

    CAS  Google Scholar 

  27. Rodriguez-Reinoso F, Molina-Sabio M, Gonzalez MT. The use of steam and CO2 as activating agents in the preparation of activated carbons. Carbon. 1995;33:15–23.

    Article  CAS  Google Scholar 

  28. Dutta S, Wen CY, Belt RJ. Reactivity of coal and char. 1. In carbon dioxide atmosphere. Ind Eng Chem Proc Des Dev. 1977;16:20–30.

  29. Solano AL, Mahajan OP, Walker PL. Reactivity of heat-treated coals in steam. Fuel. 1979;58:327–32.

    Article  Google Scholar 

  30. Tay HL, Kajitani S, Zhang S, Li CZ. Effects of gasifying agent on the evolution of char structure during the gasification of Victorian brown coal. Fuel. 2011;. doi:10.1016/j.fuel.2011.02.044.

    Google Scholar 

  31. Raghunathant K, Yang RYK. Unification of coal gasification data and its applications. Ind Eng Chem Res. 1989;28:518–23.

    Article  Google Scholar 

  32. Zhang L, Huang J, Fang Y, Wang Y. Gasification reactivity and kinetics of typical Chinese anthracite chars with steam and CO2. Energy Fuels. 2006;20:1201–10.

    Article  CAS  Google Scholar 

  33. Liu H, Luo C, Toyota M, Kato S, Uemiya S, Kojima T, Tominaga H. Mineral reaction and morphology change during gasification of coal in CO2 at elevated temperatures. Fuel. 2003;82:523–30.

    Article  CAS  Google Scholar 

  34. Takarada T, Tamai Y, Tomita A. Reactivities of 34 coals under steam gasification. Fuel. 1985;64:1438–42.

    Article  CAS  Google Scholar 

  35. Miura K, Hashimoto K, Silveston PL. Factors affecting the reactivity of coal chars during gasification, and indices representing reactivity. Fuel. 1989;68:1461–75.

    Article  CAS  Google Scholar 

  36. Moulijn JA, Kapteijn F. Towards a unified theory of reactions of carbon with oxygen-containing molecules. Carbon. 1995;33:1155–65.

    Article  CAS  Google Scholar 

  37. Sakawa M, Sakurai Y, Hara Y. Influence of coal characteristics on CO2 gasification. Fuel. 1982;61:717–20.

    Article  CAS  Google Scholar 

  38. Hou A, Wang Z, Song W, Lin W. Thermogravimetric analysis on gasification reactivity of Hailar lignite influence of inherent mineral matters and external ash. J Therm Anal Calorim. 2012;109:337–43.

    Article  CAS  Google Scholar 

  39. Fung DPC, Kim SD. Chemical reactivity of Canadian coal-derived chars. Fuel. 1984;63:1197–201.

    Article  CAS  Google Scholar 

  40. Zhang X, Liu Y, Wang C, Che D. Experimental study on interaction and kinetic characteristics during combustion of blended coals. J Therm Anal Calorim. 2012;107:935–42.

    Google Scholar 

  41. Karimi A, Semagina N, Gray MR. Kinetics of catalytic steam gasification of bitumen coke. Fuel. 2011;90:1285–91.

    Article  CAS  Google Scholar 

Download references

Acknowledgements

This work is supported by the “Strategic Priority Research Program” of Chinese Academy of Sciences (Grant No. XDA 07030100).

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Authors and Affiliations

  1. Institute of Engineering Thermophysics, Chinese Academy of Sciences, Beijing, 100190, People’s Republic of China

    Dongmei Fan, Zhiping Zhu, Yongjie Na & Qinggang Lu

  2. University of Chinese Academy of Sciences, Beijing, 100049, People’s Republic of China

    Dongmei Fan

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  1. Dongmei Fan
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  2. Zhiping Zhu
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Correspondence to Zhiping Zhu.

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Fan, D., Zhu, Z., Na, Y. et al. Thermogravimetric analysis of gasification reactivity of coal chars with steam and CO2 at moderate temperatures. J Therm Anal Calorim 113, 599–607 (2013). https://doi.org/10.1007/s10973-012-2838-9

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  • DOI: https://doi.org/10.1007/s10973-012-2838-9

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