Skip to main content
SpringerLink
Log in

Effect of Fe on NO release during char combustion in air and O2/CO2

  • Research Article
  • Published:
Frontiers in Energy Aims and scope Submit manuscript

Abstract

The chemistry of char was probed by studying nitrogen release under the reactions with air and oxy-fuel combustion. The experiments were conducted in a drop tube furnace and a fixed bed flow reactor. NO was observed during those experiments. The results show that the particle size of char generated at 1073 K in CO2 is larger than that in N2. However, at 1573 K, it is smaller in CO2 atmosphere due to particle breaking by gasification of char and CO2. The Fe addition increases the NO conversion ratio, and the effect of Fe rises steeply with the process going until it becomes stable in the end. The results also indicate that the release of NO increases more significantly with the Fe addition in oxy-fuel environment.

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

Similar content being viewed by others

References

  1. Wall T F. Combustion processes for carbon capture. Proceedings of the Combustion Institute, 2007, 31(1): 31–47

    Article  Google Scholar 

  2. Wall T F, Liu Y H, Spero C, Elliott L, Khare S, Rathnam R, Zeenathal F, Moghtaderi B, Sheng C D, Gupta R, Yamada T, Makino K, Yu J L. An overview on oxyfuel coal combustion—state of the art research and technology development. Chemical Engineering Research & Design, 2009, 87(8): 1003–1016

    Article  Google Scholar 

  3. Buhre B J P, Elliott L K, Sheng C D, Gupta R P, Wall T F. Oxy-fuel combustion technology for coal-fired power generation. Progress in Energy and Combustion Science, 2005, 31(4): 283–307

    Article  Google Scholar 

  4. Toftegaard M B, Brix J, Jensen P A, Glarborg P, Jensen A D. Oxyfuel combustion of solid fuels. Progress in Energy and Combustion Science, 2010, 36(5): 581–625

    Article  Google Scholar 

  5. Croiset E, Thambimuthu K, Palmer A. Coal combustion in O2/CO2 mixtures compared with air. Canadian Journal of Chemical Engineering, 2000, 78(2): 402–407

    Article  Google Scholar 

  6. Zheng L G, Furimsky E. Assessment of coal combustion in O2+ CO2 by equilibrium calculations. Fuel Processing Technology, 2003, 81(1): 23–34

    Article  Google Scholar 

  7. Liu H, Zailani R, Gibbs B M. Comparisons of pulverized coal combustion in air and in mixtures of O2/CO2. Fuel, 2005, 84(7): 833–840

    Article  Google Scholar 

  8. Tan Y W, Croiset E, Douglas MA, Thambimuthu K V. Combustion characteristics of coal in a mixture of oxygen and recycled flue gas. Fuel, 2006, 85(4): 507–512

    Article  Google Scholar 

  9. Kiga T, Takano S, Kimura N, Omata K, Okawa M, Mori T, Kato M. Characteristics of pulverized-coal combustion in the system of oxygen/recycled flue gas combustion. Energy Conversion and Management, 1997, 38(Suppl): 129–134

    Article  Google Scholar 

  10. Molina A, Shaddix C R. Ignition and devolatilization of pulverized bituminous coal particles during oxygen/carbon dioxide coal combustion. Proceedings of the Combustion Institute, 2007, 31(2): 1905–1912

    Article  Google Scholar 

  11. Andersson K, Johansson R, Hjartstam S, Johnsson F, Leckner B. Radiation intensity of lignite-fired oxy-fuel flames. Experimental Thermal and Fluid Science, 2008, 33(1): 67–76

    Article  Google Scholar 

  12. Andersson K, Johnsson F. Process evaluation of an 865MWe lignite fired O2/CO2 power plant. Energy Conversion and Management, 2006, 47(18,19): 3487–3498

    Article  Google Scholar 

  13. Andersson K, Johnsson F. Flame and radiation characteristics of gas-fired O2/CO2 combustion. Fuel, 2007, 86(5,6): 656–668

    Article  Google Scholar 

  14. Hu Y Q, Kobayashi N, Hasatani M. Effects of coal properties on recycled-NOx reduction in coal combustion with O2/recycled flue gas. Energy Conversion and Management, 2003, 44(14): 2331–2340

    Article  Google Scholar 

  15. Hu Y Q, Kobayashi N, Hasatani M. The reduction of recycled-NOx in coal combustion with O2/recycled flue gas under low recycling ratio. Fuel, 2001, 80(13): 1851–1855

    Article  Google Scholar 

  16. Glarborg P, Jensen A D, Johnsson J E. Fuel nitrogen conversion in solid fuel fired systems. Progress in Energy and Combustion Science, 2003, 29(2): 89–113

    Article  Google Scholar 

  17. Andersson K, Normann F, Johnsson F, Leckner B. NO emission during oxy-fuel combustion of lignite. Industrial & Engineering Chemistry Research, 2008, 47(6): 1835–1845

    Article  Google Scholar 

  18. Croiset E, Thambimuthu K V. NOx and SO2 emissions from O2/CO2 recycle coal combustion. Fuel, 2001, 80(14): 2117–2121

    Article  Google Scholar 

  19. Hu Y, Naito S, Kobayashi N, Hasatani M. CO2, NOx and SO2 emissions from the combustion of coal with high oxygen concentration gases. Fuel, 2000, 79(15): 1925–1932

    Article  Google Scholar 

  20. Hu Y Q, Kobayashi N, Hasatani M. Effects of coal properties on recycled-NOx reduction in coal combustion with O2/recycled flue gas. Energy Conversion and Management, 2003, 44(14): 2331–2340

    Article  Google Scholar 

  21. Liu H, Zailani R, Gibbs B A. Pulverized coal combustion in air and in O2/CO2 mixtures with NOx recycle. Fuel, 2005, 84(16): 2109–2115

    Article  Google Scholar 

  22. Croiset E, Thambimuthu K V. NOx and SO2 emission from O2/CO2 recycled coal combustion. Fuel, 2001, 80(14): 2117–2121

    Article  Google Scholar 

  23. Normann F, Andersson K, Leckner B, Johnsson F. High-temperature reduction of nitrogen oxides in oxy-fuel combustion. Fuel, 2008, 87(17,18): 3579–3585

    Article  Google Scholar 

  24. Mendiara T, Glarborg P. Reburn chemistry in oxy-fuel combustion of methane. Energy & Fuels, 2009, 23(7): 3565–3572

    Article  Google Scholar 

  25. Okazaki K, Ando T. NOx reduction mechanism in coal combustion with recycled CO2. Energy, 1997, 22(2,3): 207–215

    Article  Google Scholar 

  26. Lopez D, Calo J. The NO-Carbon reaction: The influence of potassium and CO on reactivity and populations of oxygen surface complexes. Energy, 2007, 21(4): 1872–1877

    Google Scholar 

  27. Park D C, Day S J, Nelson P F. Nitrogen release during reaction of coal char with O2, CO2, and H2O. Proceedings of the Combustion Institute, 2005, 30(2): 2169–2175

    Article  Google Scholar 

  28. Zhao Z B, Qiu J S, Li W, Li B Q. Influence of mineral matter in coal on decomposition of NO over coal chars and emission of NO during char combustion. Fuel, 2003, 82(8): 949–957

    Article  Google Scholar 

  29. Gong X Z, Guo Z C, Wang Z. Variation of char structure during Anthracite pyrolysis catalyzed by Fe2O3 and its influence on char combustion reactivity. Energy & Fuels, 2009, 23(9): 4547–4552

    Article  Google Scholar 

  30. Xu X F, Gu Y D, Chen S Y. The effect of Fe catalytic agent on nitrogen release in coal pyrolysis. Journal of Fuel Chemistry, 1998, 26(1): 18–23 (in Chinese)

    Google Scholar 

  31. Liu X W, Xu M H, Hong Y, Yu D X. Effect of combustion parameters on the emission and chemical composition of particulate matter during coal Combustion. Energy & Fuels, 2007, 21(1): 157–162

    Article  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan, 430074, China

    Ying Gu, Xiaowei Liu, Bo Zhao & Minghou Xu

Authors
  1. Ying Gu
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Xiaowei Liu
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Bo Zhao
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Minghou Xu
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Xiaowei Liu.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Gu, Y., Liu, X., Zhao, B. et al. Effect of Fe on NO release during char combustion in air and O2/CO2 . Front. Energy 6, 200–206 (2012). https://doi.org/10.1007/s11708-012-0181-2

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s11708-012-0181-2

Keywords

Search

Navigation