Citation: ZHOU Jun, LIU Qian, ZHONG Wen-qi, YU Zuo-wei. Migration and transformation law of potassium in the combustion of biomass blended coal[J]. Journal of Fuel Chemistry and Technology, ;2020, 48(8): 929-936. shu

Migration and transformation law of potassium in the combustion of biomass blended coal

Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China

Corresponding author: LIU Qian, liuqian@seu.edu.cn
Received Date: 18 May 2020
Revised Date: 10 July 2020

Fund Project: National Natural Science Foundation of China 51976035The project was supported by the National Natural Science Foundation of China (51976035, 51676039)National Natural Science Foundation of China 51676039

Figures(5)

The effects of combustion temperature and biomass blending ratio on the release of K, the occurrence form of K in the ash and the change of mineral matter were studied. It is found that combustion temperature has a significant effect on the release of K. At 600-750℃, with an increase in temperature, water-soluble K and NH₄Ac-soluble K are released to the gas phase, which makes the release ratio of K fast; while at 750-850℃, water-soluble K and NH₄Ac-soluble K begin to convert into other forms of K and are fixed in the ash sample, which makes the release rate of K slow; when the temperature is higher than 850℃, as the temperature increases, the decomposition of HCl-soluble K causes the release rate of K increase again. Through XRD analysis, it is found that the water-soluble K in ash mainly exists in the form of KCl. The production of K₂SO₄ is affected by both the K content in the raw material and the S/Cl ratio, the higher the content of K in raw materials, and the greater the ratio of S/Cl, the more it will promote the formation of K₂SO₄. At the same time, it is also found that there is a synergistic effect between biomass and coal combustion. The elements such as Al, Si in coal may react with K in biomass to generate alkaline aluminosilicate, resulting in more K remaining in the ash.
- biomass,
- coal,
- alkali metal,
- combustion
1. [1]
  ZHOU H, ZHANG H, LI L, ZHOU B. Ash deposit shedding during Co-combustion of coal and rice hull using a digital image technique in a pilot-scale furnace[J]. Energy Fuels, 2013,27(11):7126-7137. doi: 10.1021/ef401814y
2. [2]
  DE S, ASSADI M. Impact of cofiring biomass with coal in power plants-A techno-economic assessment[J]. Biomass Bioenergy, 2009,33(2):283-293.
3. [3]
  NIU Y, TAN H, HUI S. Ash-related issues during biomass combustion:Alkali-induced slagging, silicate melt-induced slagging (ash fusion), agglomeration, corrosion, ash utilization, and related countermeasures[J]. Prog Energy Combust, 2016,52:1-61. doi: 10.1016/j.pecs.2015.09.003
4. [4]
  YANG Guang. Study on migration of alkali metals during biomass combustion[D]. Guangzhou: South China University of Technology, 2012.
5. [5]
  YE Jia-ming, JIN Xi, YANG Jin-xin, DENG Lei, CHE De-fu. Study on the release and migration of potassium during biomass pyrolysis and combustion[J]. J Eng Thermophys, 2017,38(9):2033-2037.
6. [6]
  NARAYAN V, JENSEN P A, HENRIKSEN U B, GLARBORG P, LIN W, NIELSEN R G. Defluidization in fluidized bed gasifiers using high-alkali content fuels[J]. Biomass Bioenergy, 2016,91:160-174. doi: 10.1016/j.biombioe.2016.05.009
7. [7]
  ROBINSON A L, JUNKER H, BAXTER L L. Pilot-scale investigation of the influence of coal-biomass cofiring on ash deposition[J]. Energy Fuels, 2002,16(2):343-355. doi: 10.1021/ef010128h
8. [8]
  XUE Z, ZHONG Z, ZHANG B, ZHANG J, XIE X. Potassium transfer characteristics during co-combustion of rice straw and coal[J]. Appl Therm Eng, 2017,124:1418-1424. doi: 10.1016/j.applthermaleng.2017.06.116
9. [9]
  ABREU P, CASACA C, COSTA M. Ash deposition during the co-firing of bituminous coal with pine sawdust and olive stones in a laboratory furnace[J]. Fuel, 2010,89(12):4040-4048. doi: 10.1016/j.fuel.2010.04.012
10. [10]
  WU D, WANG Y, WANG Y, LI S, WEI X. Release of alkali metals during co-firing biomass and coal[J]. Renewable Energy, 2016,96:91-97. doi: 10.1016/j.renene.2016.04.047
11. [11]
  LIU Y, HE Y, WANG Z, XIA J, WAN K, WHIDDON R, CEN K. Characteristics of alkali species release from a burning coal/biomass blend[J]. Appl Energy, 2018,215:523-531. doi: 10.1016/j.apenergy.2018.02.015
12. [12]
  HÄRINEN V, HERNBERG R, AHO M. Demonstration of plasma excited atomic resonance line spectroscopy for on-line measurement of alkali metals in a 20kW bubbling fluidized bed[J]. Fuel, 2004,83(7):791-797.
13. [13]
  JOHANSEN J M, JAKOBSEN J G, FRANDSEN F J, GLARBORG P. Release of K, Cl, and S during pyrolysis and combustion of high-chlorine biomass[J]. Energy Fuels, 2011,25(11):4961-4971. doi: 10.1021/ef201098n
14. [14]
  LIU Y, CHENG L, ZHAO Y, JI J, WANG Q, LUO Z, BAI Y. Transformation behavior of alkali metals in high-alkali coals[J]. Fuel Process Technol, 2018,169:288-294. doi: 10.1016/j.fuproc.2017.09.013
15. [15]
  LIU Ying-zu. Laser measurement and numerical simulation of alkali metal release during combustion of single particle coal and biomass[D]. Hangzhou: Zhejiang University, 2018.
16. [16]
  XIE Xing-yun. Experimental study on the occurrence form and heat release of alkali metals in biomass[D]. Beijing: North China Electric Power University, 2019.
17. [17]
  ZHANG J, HAN C L, YAN Z, LIU K L, XU Y Q, SHENG C D, PAN W P. The varying characterization of alkali metals (Na, K) from coal during the initial stage of coal combustion[J]. Energy Fuels, 2001,15(4):786-793. doi: 10.1021/ef000140u
18. [18]
  GUO D, WU S, LIU B, YIN X, YANG Q. Catalytic effects of NaOH and Na₂CO₃ additives on alkali lignin pyrolysis and gasification[J]. Appl Energy, 2012,95:22-30. doi: 10.1016/j.apenergy.2012.01.042
19. [19]
  DAYTON D C, BELLE-OUDRY D, NORDIN A. Effect of coal minerals on chlorine and alkali metals released during biomass/coal cofiring[J]. Energy Fuels, 1999,13(6):1203-1211. doi: 10.1021/ef9900841
20. [20]
  ZHANG B, ZHONG Z, XUE Z, XUE J, XU Y. Release and transformation of potassium in co-combustion of coal and wheat straw in a BFB reactor[J]. Appl Therm Eng, 2018,144:1010-1016. doi: 10.1016/j.applthermaleng.2018.09.021
21. [21]
  JURADO N, SIMMS N J, ANTHONY E J, OAKEY J E. Effect of co-firing coal and biomass blends on the gaseous environments and ash deposition during pilot-scale oxy-combustion trials[J]. Fuel, 2017,197:145-158. doi: 10.1016/j.fuel.2017.01.111
22. [22]
  LI R, KAI X, YANG T, SUN Y, HE Y, SHEN S. Release and transformation of alkali metals during co-combustion of coal and sulfur-rich wheat straw[J]. Energy Convers Manage, 2014,83:197-202. doi: 10.1016/j.enconman.2014.02.059
23. [23]
  SONG G, YANG S, SONG W, QI X. Release and transformation behaviors of sodium during combustion of high alkali residual carbon[J]. Appl Therm Eng, 2017,122:285-296. doi: 10.1016/j.applthermaleng.2017.04.139
24. [24]
  LUPIÁÑEZ C, MAYORAL M C, GUEDEA I, ESPATOLERO S, DÍEZ L I, LAGUARTA S, ANDRÉS J M. Effect of co-firing on emissions and deposition during fluidized bed oxy-combustion[J]. Fuel, 2016,184:261-268. doi: 10.1016/j.fuel.2016.07.027
25. [25]
  AHO M, FERRER E. Importance of coal ash composition in protecting the boiler against chlorine deposition during combustion of chlorine-rich biomass[J]. Fuel, 2005,84(2):201-212.
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