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http://dx.doi.org/10.5855/ENERGY.2016.25.4.053

Study on the Unburned Carbon and NOx emission of High Moisture Coal  

Ahn, Seok-Gi (Department of Mechanical Engineering, Pusan National University)
Kim, Jung-Woo (Department of Mechanical Engineering, Pusan National University)
Kim, Gyu-Bo (Pusan Clean Coal Center)
Lee, Si-Hyun (Korea Institute of Energy Research)
Jeon, Chung-Hwan (Department of Mechanical Engineering, Pusan National University)
Publication Information
Journal of Energy Engineering / v.25, no.4, 2016 , pp. 53-61 More about this Journal
Abstract
Unburned Carbon(UBC) and NOx emissions from High-moisture coal and Dried coal were investigated in Drop Tube Furnace(DTF). When the same amount of the High-moisture coal and Dried coal were oxidized in DTF, the results show that UBC and NOx emissions of Dried coal case is higher than High-moisture coal case. As the moisture in coal decreases from 40% to 10%, the average gas temperature increases but the moisture concentration in DTF decreases. As the wall temperature increases from $900^{\circ}C$ to $1500^{\circ}C$, the UBC decreases and NOx emissions increases. Especially, the difference for UBC between High-moisture coal and Dried coal decreases with increasing wall temperature.
Keywords
High Moisture Coal; Unburned Carbon; NOx; Coal Combustion; Drop Tube Furnace; CFD (Computational Fluid Dynamics);
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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1 BP, "BP Statistical Review of World Energy June 2015", BP, pp.42, (2015)
2 F. Winter, C. Wartha, G. Lo er, and H. Hofbauer, "The NO and N2O Formation Mechanism druing Devolatilization and Char Combustion under Fluidized bed conditions", In 26th Symposium(International) on combustion, Vol. 26, No. 2, pp. 3325-3334, (1996)
3 R. Kurose, H. Tsuji, H. Makino, "Effects of moisture in coal on pulverized coal combustion characteristics", Fuel, Vol.80, pp.1457-1465, (2001)   DOI
4 H. Spliethoff, "Power Generation from Solid Fuels", Springer, pp. 234-241, (2010)
5 Song-gon Kim, Cheon-seong Lee, Byoung-hwa Lee, Ju-hun Song, Young-june Chang and Chung-hwan Jeon, "Effect of Fuel Ratio and Temperature on NOx emissions from a pulverized coal burning in a Drop Tube Furnace", KSME 2009 Fall annual meeting, pp.2475-2480, (2009)
6 IEA, "Coal information 2014", International Energy Agency, pp.43-57, (2014)
7 Blaine W. Asay, L. Dcuglas Lahjaily and Paul O. Hdeman, "Effect of Coal Moisture on Burnout and Nitrogen Oxide Formation", Combustion Science and Technology, Vol. 35, pp. 15-31, (1983)   DOI
8 Bosoaga A., Panoiu N., Mihaescu L.. Backreedy R.I., Ma L., Pourkashanian M., Wiliams A., "The Combustion of Pulverized Low Grade Lignite", Fuel, Vol. 85, pp. 1591-1598.
9 Sang-do Kim, Si-hyun Lee, Young-joon Rhim, Ho-kyung Choi, Jeong-hwan Lim, Dong-hyuk Chun and Jo-ho Yoo, "Drying Characteristic of High Moisture Coal using a Flash Dryer", Korean Chem. Eng. Res., Vol 50, No. 1, pp.106-111, (2012)   DOI
10 Byoung-hwa Lee, Ju-hun Song, Rang-gyoon Kim, Yong-gyun Kim, Young-june Chang and Chung-hwan Jeon, "Simulation of the Influence of the Coal Volatile Matter Content on Fuel NO Emissions in a Drop-Tube Furnace", Energy & Fuels, Vol.24, pp.4333-4340, (2010)   DOI
11 Sang-in Kim, Byoung-hwa Lee, Ke-ju An, Man-cheol Kim, Seung-mo Kim and Chung-hwan Jeon, "Effect of Ash Content on Unburned Carbon and NOx Emission in a Drop Tube Furnace", Trans. Korean Soc. Mech. Eng. B, Vol. 38, No. 12, pp.963-969, (2014)   DOI
12 M. Cloke, E. Lester, A.W. Thompson, "Combustion Characteristics of colas using a drop-tube furnace", Vol. 81, pp.727-735, (2002)   DOI
13 Byoung-hwa Lee, Ju-hun Song, Ki-tae Kang, Young-june Chang and Chung-hwan Jeon, "Determination of Char Oxidation Rates with Different Analytical Methods", Trans. Korean Soc. Mech. Eng. B, Vol. 33, No. 11, pp.876-885, (2009)   DOI
14 Thomas H. Fletcher and Alan R. Kerstein, "A Chemical Percolation Model for Devolatilization: Summary", pp.1-66
15 M.M. Baum and P. J. Street, "Predicting the Combustion Behavior of Coal Particles", Combustion Science and Technology, Vol.3, pp.231-243, (1971)   DOI