International Scientific Journal


The composite fuel of coal gangue and biomass is expected to increase the utilization rate of solid waste and compensate for the disadvantages of separate fuels. However, the NO and SO2 emissions from this composite fuel during the combustion process are a concern, but there are few studies on it. In this paper, corn cobs and wheat straws, typical agricultural biomass discarded in North China, and coal gangue from the mine in Xilingol, China, were selected for co-combustion in a fluidized bed. The emission characteristics of NO and SO2 were studied by changing the ratio of biomass to coal gangue and the combustion temperature. Studies had shown that: to a certain extent, mixing biomass, and coal gangue can reduce the NO and SO2 emissions, and mixing 20% of biomasses had the best effect on NO and SO2 emissions reduction. The SO2 emission reduction effect of wheat straws was better than that of corn cobs, and the NO emission reduction effect of corn cobs was better than that of wheat straws. The NO emissions of wheat straws and corn cobs added to the coal gangue were 6.45% and 7.93% less than those of coal gangue alone. The SO2 emissions of wheat straws and corn cobs added to the coal gangue were 27.45% and 25.94% less than those of coal gangue alone. Both NO and SO2 emissions decreased with the growth of the biomass rate; NO and SO2 emissions increased with the growth of the combustion temperature.
PAPER REVISED: 2022-01-27
PAPER ACCEPTED: 2022-03-13
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THERMAL SCIENCE YEAR 2022, VOLUME 26, ISSUE Issue 5, PAGES [4333 - 4343]
  1. Yuanyuan Li., et al., Co combustion characteristics and synergy analysis of biomass and coal gangue, Clean coal technology, (2021)
  2. Gil M V., et al., Thermal behaviour and kinetics of coal/biomass blends during co combustion, Bioresource Technology, 101 (2010), 14, pp. 5601 5608
  3. Statistics Bureau of the People's Republic of China. China Statistical Yearbook, Bei Jing: China Statistics Press, (2020)
  4. Jianhong Lei., Analysis on the Pollution Harm and Comprehensive Utilization of Coal Gangue, Energy ang energy conservation, 2017 (04): 90-91+147
  5. Mingzhuang Xie., et al., Mineral phase transformation in coal gangue by high temperature calcination and high-efficiency separation of alumina and silica minerals, Journal of Materials Research and Technology, 14 (2021), Sept. - Oct., pp. 2281-2288
  6. Shaobin Wang., et al., Estimate of sulfur, arsenic, mercury, fluorine emissions due to spontaneous combustion of coal gangue: An important part of Chinese emission inventories, Environmental Pollution, 209 (2016), Feb. pp. 107-113
  7. Yang Wu., et al. An overview of inorganic particulate matter emission from coal/biomass/MSW combustion: Sampling and measurement, formation, distribution, inorganic composition and influencing factors, Fuel processing Technology, 213 (2021), Mar.
  8. Li Tian., et al., Research progress of coal gangue resource utilization approach, Journal of HeiBei University of Environmental Engine, 30 (2020), 05, pp. 31-36
  9. Eduardo Garcia, Hao Liu., Ilmenite as alternative bed material for the combustion of coal and biomass blends in a fluidized bed combustor to improve combustion performance and reduce agglomeration tendency, Energy, 2021
  10. Guofang Yang, Xiangru Jia., Summary of research on co-firing of biomass and coal gangue, Industrial heating, 47 (2018), 05, pp. 1-4
  11. Yuanyuan Zhang., et al., Effect of oxygen concentration on oxy-fuel combustion characteristic and interactions of coal gangue and pine sawdust, Waste Management, 87 (2019), pp. 288--294
  12. Sahu S G., et al., Coal--biomass co-combustion: An overview, Renewable and Sustainable Energy Reviews, 39 (2014), pp. 575--586
  13. Tiffany L B Yelvertona., et al., Characterization of emissions from a pilot-scale combustor operating on coal blended with woody biomass, Fuel, 264 (2020)
  14. Farooq Sher., et al., Torrefied biomass fuels as a renewable alternative to coal in co-firing for power generation, Energy, 209 (2020)
  15. Haobo Bi., et al., Pyrolysis characteristics, artificial neural network modeling and environmental impact of coal gangue and biomass by TG-FTIR, Science of the Total Environment, 751 (2021)
  16. Haobo Bi., et al., The effect of biomass addition on pyrolysis characteristics and gas emission of coal gangue by multi-component reaction model and TG-FTIR-MS, Science of the Total Environment, 798 (2021)
  17. Yabin Zhao., et al., Co-firing characteristics and kinetic characteristics of biomass and coal gangue, Clean coal technology, 26 (2020), S1, pp. 161-165
  18. Zhen Gong., et al., Study on the emission of pollutants from biomass and coal gangue combustion in a circulating fluidized bed in an oxygen-enriched atmosphere, Chinese Society for Electrical Engineering, 40 (2020), 12, pp. 3951-3959
  19. Zhen Gong., et al., Influence of heating rate on combustion characteristics of biomass and coal gangue in O2/CO2 atmosphere, Acta Energiae Solaris Sinica, 41 (2020), 09, pp. 366-374
  20. Zhihui Shi., et al., Emission characteristics of NO and SO2 for co-combustion of agricultural biomass and coal gangue in a bubbling fluidized bed, Acta Energiae Solaris Sinica, 41 (2020), 11, pp. 341-346
  21. Xudong Yang., et al., Experimental and numerical investigation of the combustion characteristics and NO emission behaviour during the co-combustion of biomass and coal, Fuel, 287 (2021)
  22. Emad Roknia., et al., Emissions of SO2, NOx, CO2, and HCl from Co-firing of coals with raw and torrefied biomass fuels, Fuel, 211 (2018), pp. 363--374
  23. Jale Yanik., et al., NO and SO2 emissions from combustion of raw and torrefied biomasses and their blends with lignite. Journal of Environmental Management, 227 (2018), pp. 155-161
  24. Thanet Uncharisri, Suneerat Fukuda., Co-firing of coal and rice straw pellet in a circulating fluidized-bed reactor, Energy Procedia, 138 (2017), pp. 766-771
  25. ASTM D197-87. Standard Test Method for Sampling and Fineness Test of Pulverized Coa, West Conshohocken, PA, USA, ASTM International (2012)
  26. Guofang YANG., et al., Synergistic analysis of co-combustion of sunflower straw and coal gangue, BioResources, 2020, 15(4): 7770-7779
  27. Yonmo Sung., et al., Synergistic effect of co-firing woody biomass with coal on NOx reduction and burnout during air-staged combustion, Experimental Thermal and Fluid Science, 71 (2016), pp. 114-125
  28. Wojciech Moron, Wiesław Rybak., NOx and SO2 emissions of coals, biomass and their blends under different oxy-fuel atmospheres, Atmospheric Environment, 116 (2015), pp. 65-71
  29. Xuebin Wang., et al., Effect of biomass/coal co-firing and air staging on NOx emission and combustion efficiency in a drop tube furnace, Energy Procedia, 61(2014), pp. 2331--2334
  30. Carlos Lupiáñez., et al., Experimental study of SO2 and NOx emissions in fluidized bed oxy-fuel combustion, Fuel Processing Technology, 106 (2013), pp. 587-594.

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