Skip to main content
SpringerLink
Log in

Gasification characteristics of coal char under CO2 atmosphere

  • Published:
Journal of Thermal Analysis and Calorimetry Aims and scope Submit manuscript

Abstract

The char gasification characteristics and the composition of evolved gases in a CO2 environment have been studied using a thermogravimetric analyzer (TG) coupled with a mass spectrometer. Three types of coal char were studied: lignite (TXL), sub-bituminous (PRB), and bituminous (KYB). TG results showed that the reactivities of TXL and PRB were higher than that of KYB, and the reactivity of TXL was higher than that of PRB. The characterization of the chars implied that the mineral content in the char plays an important role in the reactivity and that the surface area and pore volume may accelerate the reactivity of chars. The evolved gases from three chars were mainly CO and SO2. SO2 was slightly delayed by CO during gasification of TXL and PRB chars, but for KYB, SO2 and CO formed in the same temperature range, but at higher temperatures compared with TXL and PRB. The CO production of KYB was the best, 0.98 mg mg−1; and SO2 was the least, 0.031 mg mg−1. PRB and TXL chars had similar CO production, but SO2 in TXL was higher.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3

Similar content being viewed by others

References

  1. Kajitani S, Suzuki N, Ashizawa M, Hara S. CO2 gasification rate analysis of coal char in entrained flow coal gasifier. Fuel. 2006;85(2):163–9.

    Article  CAS  Google Scholar 

  2. Liu H, Luo CH, Kato SG, Uemiya SYK, et al. Kinetics of CO2/Char gasification at elevated temperatures, Part I: experimental results. Fuel Process Technol. 2006;87:775–81.

    Article  CAS  Google Scholar 

  3. Liu TF, Fang YT, Wang Y. An experimental investigation into the gasification reactivity of chars prepared at high temperatures. Fuel. 2008;87(4–5):460–6.

    Article  CAS  Google Scholar 

  4. Sun QL, Li W, Chen HK, Li BQ. The CO2-gasification and kinetics of Shenmu maceral chars with and without catalyst. Fuel. 2004;83:1787–93.

    Article  CAS  Google Scholar 

  5. Tomaszewicz M, Labojko G, Tomaszewicz G, Kotyczka M. The kinetics of CO2 gasification chars. J Therm Anal Claorim. 2013;113:1327–35.

    Article  CAS  Google Scholar 

  6. Salatino P, Senneca O, Masi S. Assessment of thermodeactivation during gasification of a bituminous coal char. Energy Fuels. 1999;13:1154–9.

    Article  CAS  Google Scholar 

  7. Shao J, Yan R, Chen H, Wang B, Lee D, Liang D. Pyrolysis characteristics and kinetics of sewage sludge by thermogravimetry Fourier transform infrared analysis. Energy Fuels. 2008;22:38–45.

    Article  CAS  Google Scholar 

  8. Lu R, Purushothama S, Yang X, Hyatt J, Pan W, Riley J, Lloyd W. TG/FTIR/MS study of organic compounds evolved during the co-firing of coal and refuse-derived fuels. Fuel Process Technol. 1999;59:35–50.

    Article  CAS  Google Scholar 

  9. Fushimi C, Araki K, Yamaguchi Y, Tsutsumi A. Effect of heating rates on steam gasification of biomass, thermogravimetric-mass spectrometric (TG-MS) analysis off gas evolution. Ind Eng Chem Res. 2003;42:3929–36.

    Article  CAS  Google Scholar 

  10. Zhang LX, Huang JJ, Fang YT, 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 

  11. Zhou ZJ, Lin M, Kuang JP, Liu JZ, et al. Effect of char making temperature and coke-forming time on char gasification specific activity. Coal Convers. 2006;29(3):21–4.

    CAS  Google Scholar 

  12. Hurt RH, Sarofim AF, Longwell JP. The role of microporous surface area in the gasification of chars from a sub-bituminous coal. Fuel. 1991;70(9):1079–82.

    Article  CAS  Google Scholar 

  13. Sakawa M, Sakurai Y, Hara Y. Influence of coal characteristics on CO2 gasification. Fuel. 1982;61(8):717–20.

    Article  CAS  Google Scholar 

  14. Morales IF, Garzon FJL, Peinado AL, et al. Study of heat-treated Spanish lignites: characteristics and behavior in CO2 and O2 gasification reactions. Fuel. 1985;64(5):664–73.

    Google Scholar 

  15. Zhong H, Pu WX, Si HA. The influence of included minerals on the intrinsic reactivity of chars prepared at 900 °C in a drop tube furnace and a muffle furnace. Fuel. 2009;88(11):2303–10.

    Article  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Institute for Combustion Science and Environmental Technology (ICSET), Western Kentucky University, Bowling Green, KY, 42101, USA

    Houyin Zhao, Yan Cao, William Orndorff & Wei-Ping Pan

Authors
  1. Houyin Zhao
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Yan Cao
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. William Orndorff
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Wei-Ping Pan
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Yan Cao.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Zhao, H., Cao, Y., Orndorff, W. et al. Gasification characteristics of coal char under CO2 atmosphere. J Therm Anal Calorim 116, 1267–1272 (2014). https://doi.org/10.1007/s10973-013-3627-9

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s10973-013-3627-9

Keywords

Search

Navigation