Abstract
Fuel blending is one of the most effective ways to use biomass to reduce the use of coal. In this study, co-combustion characteristics including NOx emissions, unburned carbon (UBC), and the char reactivity of coal, biomass, and pretreated biomass blends were investigated by using a lap scale drop tube furnace (DTF) and thermogravimetric analyzer (TGA) to evaluate the availability of pretreated biomass from torrefaction or ashless technology to a pulverized coal boiler. In addition, scanning electron microscopy (SEM) was used to analyze the morphology of biomass and pretreated biomass to observe the physical differences between raw samples and their chars. In the results, NOx showed a linear correlation with the content of inherent fuel-N of biomass except in blending cases with ashless biomass. This indicated that the yields of NOx in these cases were higher than both that of single coal and ashless biomass. In addition, UBC declined with increasing the biomass blending ratio for all blending cases, and this can be explained by examining the fuel ratio and SEM images of the fuel samples. Finally, blends with coal and torrefied biomass showed higher char reactivity and lower activation energy than that with ashless biomass as the blending ratio increased. Overall, this paper indicates that it is better to increase the blending ratio of pretreated biomass than raw biomass up to 30% for enhanced reactivity and reduced emissions.
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References
Korean Administration, 7th Basic Plan for Long Term Electricity Demand and Supply, Korea (2015).
N. H. Kang, Korea Energy Handbook, Korea Energy Agency, Korea (2017) 11–29.
T. Nussbaumer, Combustion and co-combustion of biomass: Fundamentals, technologies, and primary measures for emission reduction, Energy & Fuels, 17 (2003) 1510–1521.
V. Despina and S. Stelios, Combustion behaviour of biomass fuels and their blends with lignite, Thermo. Chem. Acta., 526 (2011) 192–199.
W. Dongyin, W. Yuhao, W. Yang, L. Sen and W. Xiaolin, Release of alkali metals during co-firing biomass and coal, Renewable Energy, 96 (2016) 91–97.
K. Narayanan and E. Natarajan, Experimental studies on co-firing of coal and biomass blends in India, Renewable Energy, 32 (2007) 48–58.
A. Williams, M. Pourikashanian and J. M. Jones, Combustion of pulverized coal and biomass, Prog. Energy Combust. Sci., 27 (2001) 587–610.
E. Lester, M. Gong and A. Thompson, A method for source apportionment in biomass/coal blends using thermogravimetric analysis, Journal of Analysis and Applied Pyrolysis, 80 (2007) 111–117.
S. G. Sahu, P. Sarkar, N. Charkraborty and A. K. Adak, Thermogravimetric assessment of combustion characteristics of blends of a coal with different biomass chars, Fuel Processing Technology, 91 (2010) 369–378.
E. Kastanaki and D. Vamvuka, A comparative reactivity and kinetic study on the combustion of coal-biomass char blends, Fuel, 85 (2006) 1186–1193.
B. I. Na, B. J. Ahn, S. T. Cho and J. W. Lee, Optimal condition of torrefaction for the high-density solid fuel of larch (Larix kaempferi), Korean Journal of Chemical Engineering, 51 (2013) 739–740.
Y. J. Lee, J. W. Choi, J. H. Park, H. Namkung, G. S. Song, S. J. Park, D. W. Lee, J. G. Kim, C. H. Jeon and Y. C. Choi, Techno-economical method for the removal of alkali metals from agricultural residue and herbaceous biomass and its effect on slagging and fouling behavior, ACS Sustainable Chem. Eng., 6 (2018) 13056–13065.
E. Rokni, X. Ren, A. Panahi and Y. A. Levendis, Emissions of SO2, NOx, CO2, and HCl from co-firing of coals with raw and torrefied biomass fuels, Fuel, 211 (2018) 363–374.
X. Ren, R. Sun, X. Meng, N. Vorobiev, M. Schiemann and Y. A. Levendis, Carbon, sulfur and nitrogen oxide emissions from combustion of pulverized raw and torrefied biomass, Fuel, 188 (2017) 310–323.
A. Toptas, Y. Yildirim, G. Duman and J. Yanik, Combustion behavior of different kinds of torrefied biomass and their blends with lignite, Bioresource Technology, 177 (2015) 328–336.
Y. J. Lee, J. H. Park, G. S. Song, H. Namkung, S. J. Park, J. G. Kim, Y. C. Choi, C. H. Jeon and J. W. Choi, Characterization of PM2.5 and gaseous emissions during combustion of ultra-clean biomass via dual-stage treatment, Atmospheric Environment, 193 (2018) 168–176.
M. Asadieraghi and W. Daud, Characterization of lignocellulosic biomass thermal degradation and physiochemical structure: Effects of demineralization by diverse acid solutions, Energy Conversion and Management, 82 (2014) 71–82.
B. H. Lee, S. G. Kim, J. H. Song, Y. J. Chang and C. H. Jeon, Influence of coal blending methods on unburned carbon and NO emissions in a drop-tube furnace, Energy & Fuels, 25 (2011) 5055–5062.
H. Lim, L. Shagdarsuren, S. M. Kim, A. Hoshino, T. Yamashita and C. H. Jeon, The effect of blending of bituminous and sub-bituminous coals on ash fusibility and deposition formation, Journal of Mechanical Science and Technology, 30 (2016) 1413–1420.
B. H. Lee, E. G. Eddings and C. H. Jeon, Effect of coal blending methods with different excess oxygen on unburned carbon and NOx emissions in an entrained flow reactor, Energy & Fuels, 26 (2012) 6803–6814.
A. W. Coats and J. P. Redfern, Kinetic parameter from thermogravimetric data, J. Polym. Sci., 3 (1965) 917–920.
H. Lim, L. Shagdarsuren, C. H. Oh, B. H. Lee and C. H. Jeon, Effect of ash fraction and particle size on ash deposition during pulverized coal combustion, Journal of Mechanical Science and Technology, 30 (2016) 3393–3400.
M. V. Gil, J. Riaza, L. Alvarez, C. Pevida and F. Rubiera, Biomass devolatilization at high temperature under N2 and CO2: Char morphology and reactivity, Energy, 91 (2015) 655–662.
S. Zhang, B. Hu, L. Zhang and Y. Xiong, Effects of torrefaction on yield and quality of pyrolysis char and its application on preparation of activated carbon, Journal of Analytical and Applied Pyrolysis, 119 (2016) 217–223.
V. T. Sathyanathan and K. P. Mohammad, Prediction of unburnt carbon in tangentially fired boiler using Indian coals, Fuel, 83 (2004) 2217–2227.
S. W. Du, W. H. Chen and J. A. Lucas, Pulverized coal burnout in blast furnace simulated by a drop tube furnace, Energy, 35 (2010) 576–581.
C. Moon, Y. Sung, S. Eom and G. Choi, NOx emissions and burnout characteristics of bituminous coal, lignite, and their blends in a pulverized coal-fired furnace, Experimental Thermal and Fluid Science, 62 (2015) 99–108.
K. Savolainen, Co-firing of biomass in coal-fired utility boilers, Applied Energy, 74 (2003) 369–381.
Z. J. Zhou, Q. J. Hu, X. Lui, G. S. Yu and F. C. Wang, Effect of iron species and calcium hydroxide on high-sulfur petroleum coke-CO2 gasification, Energy & Fuels, 26 (2012) 1489–1495.
K. Al-Qayim, W. Nimmo, K. Hughes and M. Pourkashanian, Kinetic parameters of the intrinsic reactivity of woody biomass and coal chars via thermogravimetric analysis, Fuel, 210 (2017) 811–825.
G. Wang, J. Zhang, J. Shao, Z. Liu, G. Zhang, T. Xu, J. Guo, H. Wang, R. Xu and H. Lin, Thermal behavior and kinetic analysis of co-combustion of waste biomass/low rank coal blends, Energy Conversion and Management, 124 (2016) 414–426.
J. S. Tumuluru, S. Sokhansanj, J. R. Hess, C. T. Wright and R. D. Boardman, A review on biomass torrefaction process and product properties for energy applications, Industrial Biotechnology, 7 (2011) 384–402.
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Jong-Ho Kim received his B.S. (2016) and M.S. (2018) degrees in Mechanical Engineering from Pusan National University. He is currently a research student in Pusan National University.
Tae-Yong Jeong received his B.S. (2010) and M.S. (2012) degrees in Mechanical Engineering from Pusan National University. He is currently a Ph.D. student at Pusan National University.
Jianglong Yu received his Ph.D. in Chemical Engineering from the University of Newcastle (UoN) in 2003. He is currently a Professor of Chemical Engineering at UoN and the University of Science and Technology Liaoning. He also acts as the Director of the International Collaborative Centre for Carbon Futures.
Chung-Hwan Jeon received his B.S. (1985), M.S. (1987), and Ph.D. (1994) degrees from Pusan National University. He is currently a Professor in the School of Mechanical Engineering at Pusan National University, and is currently serving as a Director of Pusan Clean Coal Center and CFB Research Center.
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Kim, JH., Jeong, TY., Yu, J. et al. Influence of biomass pretreatment on co-combustion characteristics with coal and biomass blends. J Mech Sci Technol 33, 2493–2501 (2019). https://doi.org/10.1007/s12206-019-0446-3
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DOI: https://doi.org/10.1007/s12206-019-0446-3