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The effects of coal blending on the formation and properties of particulate matter during combustion

  • Article
  • SPECIAL TOPIC: Huazhong University of Science and Technology Materials Science
  • Published:
Chinese Science Bulletin

Abstract

The control of particulate matter (PM) emissions from coal combustion becomes an urgent work due to their adverse effects on human health. Coal blending is a promising option for submicron particulate (PM1) reduction. This study addressed the effects of coal blending on the formation and properties of particulate matter in combustion process. Coal blends from lignite and bituminous coal, with different blend ratios (9:1, 7:3, 5:5, 3:7 and 1:9), were combusted in a drop tube furnace. The mass size distribution, concentration, elemental composition and morphology of the particulate matter generated under O2/N2 and O2/CO2 conditions were characterized. Particulate matter was collected by a low pressure impactor (LPI), which aerodynamically segregated particulates into thirteen fractions with sizes ranging from 0.03 to 9.8 μm. The results showed that coal blending reduced PM1 generation, compared with the calculated average values from the combustion of constituent coals. This indicated that the mineral interactions had a great effect on PM1 reduction. The blend ratio also played an important role in the suppression of PM1 generation. In this experimental study, PM1 generation suffered a maximum suppression at the blend ratio of 7:3. The O2/CO2 atmosphere affected the formation and properties of the PM1 during coal blends combustion. Compared with the O2/N2 combustion, the interaction of minerals was weakened under O2/CO2 combustion, thus the suppression of PM1 generation decreased after coal blending. Compared with the calculated values, the concentrations and percentages of Ca, Fe in PM1 decreased, but the concentrations of Ca, Fe, Si and Al in coarse particulates (PM10+) increased after coal blends combustion. The interactions between the aluminosilicates in the bituminous coal and volatile elements Ca, Fe in the lignite were thought to contribute to the suppression of PM1 generation during the combustion of coal blends.

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References

  1. Flagan R C. Submicron particles from coal combustion. P Combust Inst, 1979 17: 97–104

    Article  Google Scholar 

  2. Ninomiya Y, Zhang L, Sato A, et al. Influence of coal particle size on particulate matter emission and its chemical species produced during coal combustion. Fuel Process Technol, 2004, 85: 1065–1088

    Article  Google Scholar 

  3. Buhre B J P, Hinkley J T, Gupta R P, et al. Fine ash formation during combustion of pulverised coal-coal property impacts. Fuel, 2006, 85: 185–193

    Article  Google Scholar 

  4. Senior C L, Panagiotou T, Sarofim A F, et al. Formation of ultra-fine particulate matter from pulverized coal combustion. In: Preprints of symposia, division of fuel chemistry vol. 45(1), American Chemical Society, Washington, DC, 2000

    Google Scholar 

  5. Yan L, Gupta R P, Wall T F. Fragmentation behavior of pyrite and calcite during high-temperature processing and mathematical simulation. Energy Fuels, 2001, 15: 389–394

    Article  Google Scholar 

  6. Yan L, Gupta R P, Wall T F. The implication of mineral coalescence behavior on ash formation and ash deposition during pulverized coal combustion. Fuel, 2001, 80: 1333–1340

    Article  Google Scholar 

  7. Zhang L, Ninomiya Y. Emission of suspended PM10 from laboratory scale coal combustion and its correlation with coal mineral properties. Fuel, 2006, 85: 194–203

    Article  Google Scholar 

  8. Zhang L, Ito M, Sato A, et al. Combustibility of dried sewage sludge and its mineral transformation at different oxygen content in drop tube furnace. Fuel Process Technol, 2004, 85: 983–1011

    Article  Google Scholar 

  9. Monroe L S. An experimental and modeling study of residual fly ash formation in combustion of a bituminous coal. Doctoral Disseration. Cambridge: Department of Chemical Engineering, MIT, 1989

    Google Scholar 

  10. Seames W S. An initial study of the fine fragmentation fly ash particle mode generated during pulverized coal combustion. Fuel Process Technol, 2003, 81: 109–125

    Article  Google Scholar 

  11. Buhre B J P, Hinkley J T, Gupta R P, et al. Submicron ash formation from coal combustion. Fuel, 2005, 84: 206–214

    Article  Google Scholar 

  12. Quann R J, Sarofim A F. Vaporization of refractory oxides during pulverized coal combustion. P Combust Inst, 1982, 19: 1429–1440

    Article  Google Scholar 

  13. Kramlich J C, Newton G H. Influence of coal rank and pretreatment on residual ash particle size. Fuel Process Technol, 1994, 37: 143–161

    Article  Google Scholar 

  14. Yao H, Mkilaha I S N, Naruse I. Screening of sorbents and capture of lead and cadmium compounds during sewage sludge combustion. Fuel, 2004, 83: 1001–1007

    Article  Google Scholar 

  15. Zhang L, Ninomiya Y, Yamashita T. Formation of submicron particulate matter (PM1) during coal combustion and influence of reaction temperature. Fuel, 2006, 85: 1446–1457

    Article  Google Scholar 

  16. Wee H L, Wu H, Zhang D, et al. The effect of combustion conditions on mineral matter transformation and ash deposition in a utility boiler fired with a sub-bituminous coal. P Combust Inst, 2005, 30: 2981–2989

    Article  Google Scholar 

  17. Davis S B, Gale T K, Wendt J O L. Competition for sodium and toxic metals capture on sorbents. Aerosol Sci Technol, 2000, 32: 142–152

    Article  Google Scholar 

  18. Gale T K, Wendt J O L. High-temperature interactions between multiplemetals and kaolinite. Combust Flame, 2002, 131: 299–307

    Article  Google Scholar 

  19. Zheng Y, Jensen P A, Jensen A D. A kinetic study of gaseous potassium capture by coal minerals in a high temperature fixed-bed reactor. Fuel, 2008, 87: 3304–3312

    Article  Google Scholar 

  20. Wang Q, Zhang L, Sato A. Effects of coal blending on the reduction of PM10 during high-temperature combustion 1. Mineral transformations. Fuel, 2008, 87: 2997–3005

    Google Scholar 

  21. Wang Q, Zhang L, Sato A, et al. Reduction of PM10 by combustion of coal blends. In: 6th Asia-Pacific conference on combustion program of ASPACC007, Nagoya, Japan, May 2007

  22. Wang Q, Zhang L, Sato A, et al. Effects of coal blending on the reduction of PM10 during high-temperature combustion 2. A coalescence fragmentation model. Fuel, 2009, 88: 150–157

    Article  Google Scholar 

  23. Suriyawong A, Gamble M, Lee M H, et al. Submicrometer particle formation and mercury speciation under O2-CO2 coal combustion. Energy Fuels, 2006, 20: 2357–2363

    Article  Google Scholar 

  24. Sheng C D, Li Y, Liu X. Ash particle formation during O2/CO2 combustion of pulverized coals. Fuel Process Technol, 2007, 88: 1021–1028

    Article  Google Scholar 

  25. Liu X, Xu M H, Yao H, et al. Effect of combustion parameters on the emission and chemical composition of particulate matter during coal combustion. Energy Fuels, 2007, 21: 157–162

    Article  Google Scholar 

  26. Zhou K, Xu M H, Yu D, et al. The emission and properties of particulate matter generated during coal combustion under O2/N2 and O2/CO2 conditions (in Chinese). J Eng Thermophys, 2009, 30: 1063–1066

    Google Scholar 

  27. Bejarano P A, Levendis Y A. Single-coal-particle combustion in O2/N2 and O2/CO2 environments. Combust Flame, 2008, 153: 270–287

    Article  Google Scholar 

  28. Linak W P, Miller C A, Seames W S, et al. Fine and ultrafine ash aprticles from pulverized coal combustion. Trace elemental workshop 2002, Yokohama, Japan, 2002, 39–69

  29. Ramsden A R. A microscopic investigation into the formation of fly-ash during the combustion of a pulverized bituminous coal. Fuel, 1969, 48: 121–137

    Google Scholar 

Download references

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Authors and Affiliations

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

    Ke Zhou, MingHou Xu, DunXi Yu, Chang Wen, ZhongHua Zhan & Hong Yao

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  1. Ke Zhou
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  2. MingHou Xu
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  3. DunXi Yu
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  4. Chang Wen
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  5. ZhongHua Zhan
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  6. Hong Yao
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Correspondence to MingHou Xu.

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Zhou, K., Xu, M., Yu, D. et al. The effects of coal blending on the formation and properties of particulate matter during combustion. Chin. Sci. Bull. 55, 3448–3455 (2010). https://doi.org/10.1007/s11434-010-3250-z

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  • DOI: https://doi.org/10.1007/s11434-010-3250-z

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