Combustion characteristics of unburned pulverized coal and its reaction kinetics with CO<sub>2</sub>

Dong-wen Xiang; Feng-man Shen; Jia-long Yang; Xin Jiang; Hai-yan Zheng; Qiang-jian Gao; Jia-xin Li

doi:10.1007/s12613-019-1791-z

Volume 26 Issue 7

Jul. 2019

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2019 > 26(7): 811-821

Dong-wen Xiang, Feng-man Shen, Jia-long Yang, Xin Jiang, Hai-yan Zheng, Qiang-jian Gao, and Jia-xin Li, Combustion characteristics of unburned pulverized coal and its reaction kinetics with CO₂, Int. J. Miner. Metall. Mater., 26(2019), No. 7, pp. 811-821. https://doi.org/10.1007/s12613-019-1791-z

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Dong-wen Xiang, Feng-man Shen, Jia-long Yang, Xin Jiang, Hai-yan Zheng, Qiang-jian Gao, and Jia-xin Li, Combustion characteristics of unburned pulverized coal and its reaction kinetics with CO2, Int. J. Miner. Metall. Mater., 26(2019), No. 7, pp. 811-821. https://doi.org/10.1007/s12613-019-1791-z

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Research Article

Combustion characteristics of unburned pulverized coal and its reaction kinetics with CO₂

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Corresponding author:
Xin Jiang E-mail: jiangx@smm.neu.edu.cn
Received: 17 July 2018; Revised: 26 November 2018; Accepted: 7 December 2018

Abstract

Abstract

The combustion characteristics of two kinds of unburned pulverized coal (UPC) made from bituminous coal and anthracite were investigated by thermogravimetric analysis under air. The reaction kinetics mechanisms between UPC and CO₂ in an isothermal experiment in the temperature range 1000-1100℃ were investigated. The combustion performance of unburned pulverized coal made from bituminous coal (BUPC) was better than that of unburned pulverized coal made from anthracite (AUPC). The combustion characteristic indexes (S) of BUPC and AUPC are 0.47×10^-6 and 0.34×10^-6%2·min^-2·℃^-3, respectively, and the combustion reaction apparent activation energies are 91.94 and 102.63 kJ·mol^-1, respectively. The reaction mechanism of BUPC with CO₂ is random nucleation and growth, and the apparent activation energy is 96.24 kJ·mol^-1. By contrast, the reaction mechanism of AUPC with CO₂ follows the shrinkage spherical function model and the apparent activation energy is 133.55 kJ·mol^-1.
- unburned pulverized coal;
- combustion characteristics;
- reactivity;
- reaction mechanism;
- apparent activation energy

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[1]	T. Ariyama and M. Sato, Optimization of ironmaking process for reducing CO₂ emissions in the integrated steel works, ISIJ Int., 46(2006), No. 12, p. 1736.
[2]	Y.S. Shen, B.Y. Guo, A.B. Yu, D. Maldonado, P. Austin, and P. Zulli, Three-dimensional modelling of coal combustion in blast furnace, ISIJ Int., 48(2008), No. 6, p. 777.
[3]	Y.S. Shen and A.B. Yu, Characterization of coal burnout in the raceway of an ironmaking blast furnace, Steel Res. Int., 86(2015), No. 6, p. 604.
[4]	N.S. Hur, B.R. Cho, J.S. Choi, K.W. Hanand, and K.Y. Seo, High coal injection into the blast furnace under high productivity, Rev. Met. Paris, 93(1996), No. 3, p. 367.
[5]	J.G. Mathieson, J.S. Truelove, and H. Rogers, Toward an understanding of coal combustion in blast furnace tuyere injection, Fuel, 84(2005), No. 10, p. 1229.
[6]	K. Kimura, S. Kishimoto, A. Ssakai, T. Ariyama, and M. Sato, Challenge to the highest PC rate operating at Fukuyama No. 4 BF, Rev. Met. Paris, 93(1996), No. 4, p. 575.
[7]	R.S. Diao and B.S. Hu, Behavior of unburned particle in blast furnace pulverized coal injection, Iron Steel Vanadium Titanium, 24(2003), No. 3, p. 17.
[8]	Y. Iwanaga, Investigation on behavior of unburnt pulverized coal in blast furnace, ISIJ Int., 31(1991), No. 5, p. 494.
[9]	Q.Y. Yu, J. Cao, and F.M. Shen, Experimental research on effect of unburned pulverized coal on coke reactivity in blast furnace, Baosteel Technol., 2006, Suppl. 1, p. 31.
[10]	L.E. Arri and N.R. Amundson, An analytical study of single particle char gasification, AIChE J., 24(1978), No. 1, p. 72.
[11]	S.K. Bhatia and D.D. Perlmutter, A random pore model for fluid-solid reactions:I. isothermal, kinetic control, AIChE J., 26(1980), No. 3, p. 379.
[12]	S.K. Bhatia and D.D. Perlmutter, A random pore model for fluid-solid reactions:Ⅱ. diffusion and transport effects, AIChE J., 27(1981), No. 2, p. 247.
[13]	F.Y. Wang and S.K. Bhatia, A generalised dynamic model for char particle gasification with structure evolution and peripheral fragmentation, Chem. Eng. Sci., 56(2001), No. 12, p. 3683.
[14]	S. Reyes and K.F. Jensen, Percolation concepts in modelling of gas-solid reactions-I. Application to char gasification in the kinetic regime, Chem. Eng. Sci., 41(1986), No. 2, p. 333.
[15]	S. Reyes and K.F. Jensen, Percolation concepts in modelling of gas-solid reactions-Ⅱ. Application to char gasification in the diffusion regime, Chem. Eng. Sci., 41(1986), No. 2, p. 345.
[16]	J. Deng, Y.H. Luo, and Q.C Wang, Study on gasification of anthracite with carbon dioxide by thermogravimetry, Coal Convers., 30(2007), No. 1, p. 10.
[17]	Y. Iwanaga, Gasification rate analysis of unburnt pulverized coal in blast furnace, ISIJ Int., 31(1991), No. 5, p. 500.
[18]	B. Gao, J.Q. Zeng, and J.W. Yin, Study on the activity of unburned pulverized coal in blast furnace, Ironmaking, 18(1999), No. 2, p. 33.
[19]	L.Y. Zhou and J.H. Zhao, Effects on slag viscosity caused by UPC, J. Anhui Univ. Technol., 21(2004), No. 1, p. 1.
[20]	L.H. Wei, R.D. Li, A.M. Li, Y.J. Li, and X.M. Jiang, Study on ignition characteristics of micro-pulverized coal by thermogravimetry, J. China Coal Soc., 33(2008), No. 11, p. 1292.
[21]	Y.S. Fan, Z. Zou, J.B. Gao, and Z.D. Cao, Study of oxygen content on combustion characteristics of pulverized coal, Proc. CSEE, 25(2005), No. 24, p. 118.
[22]	R. Wang, The Investigation of the Combustion and Pyrogenation[Dissertation], Zhejiang University, Hangzhou, 2005, p. 16.
[23]	K. Xiang, Experimental and Simulational Study of High Efficient and Low NOx Combustion of Low-Volatile Pulverized Coal[Dissertation], Huazhong University of Science & Techology, Wuhan, 2008, p. 20.
[24]	C.F. Lu, Study on Characters and Structure of Coal for Injection in Blast Furnace of Chongqing I & S Co.[Dissertation], Chongqing University, Chongqing, 2007, p. 20.
[25]	J.Y. Chen and X.X. Sun, Determination of the devolatilization index and combustion characteristic index of pulverized coals, Power Eng., (1987), No. 5, p. 13.
[26]	Y.G. Xu, C. Zhang, J. Xia, Y.H. Duan, J.J. Yin, and G. Chen, Experimental study on the comprehensive behavior of combustion for blended coals, Asia-Pac. J. Chem. Eng., 5(2010), No. 3, p. 435.
[27]	X.G. Li, Y. Lv, B.G. Ma, S.W. Jian, and H.B. Tan, Thermogravimetric investigation on co-combustion characteristics of tobacco residue and high-ash anthracite coal, Bioresour. Technol., 102(2011), No. 20, p. 9783.
[28]	Z.M. Wang, R. Liu, Q. Lv, E.H. Liu, and S.H. Zhang, Effect of coal petro-graphic constituent on combustion ratio of coal in BF coal injection, J. Iron Steel Res., 22(2010), No. 5, p. 23.
[29]	J.C. Crelling, E.J. Hippo, B.A. Woerner, and P.W.J. David, Combustion characteristics of selected whole coals and macerals, Fuel, 71(1992), No. 2, p. 151.
[30]	W.R. Xu and H.G. Du, Influence of macerals on the combustion characteristics of pulverized coal injection into BF, Baosteel Technol., 1998, No. 5, p. 30.
[31]	W.R. Zeng, Y.J. Zhou, R.R. Huo, B. Yao, and Y.Z. Li, The degradation kinetic study of polystyrene by a combination of non-isothermal differential and integral methods, Polym. Mater. Sci. Eng., 22(2006), No. 5, p. 162.
[32]	C. Wang, J.L. Zhang, G.W. Wang, K.X. Jiao, Z.J. Liu, and K.C. Chou, Combustion characteristics and kinetics of anthracite with added chlorine, Int. J. Miner. Metall. Mater., 24(2017), No. 7, p. 745.
[33]	H.B. Zuo, W.W. Geng, J.L. Zhang, and G.W. Wang, Comparison of kinetic models for isothermal CO₂ gasification of coal char-biomass char blended char, Int. J. Miner. Metall. Mater., 22(2015), No. 4, p. 363.
[34]	J.H Zhou, C.J Ping, W.J. Yang, J.Z. Liu, J. Cheng, and K.F. Cen, Thermo-gravimetric research on dynamin combustion reaction parameters of blended coals, Chin. J. Power Eng., 25(2005), No. 2, p. 207.
[35]	Y.H. Bai, Y.L. Wang, S.H. Zhu, L.J. Yan, F. Li, and K.C. Xie, Synergistic effect between CO₂ and H₂O on reactivityduring coal chars gasification, Fuel, 126(2014), p. 1.
[36]	W.Z. Liu, J. Yu, J.W. Zhang, S.Q. Gao, and G.W. Xu, Kinetic study of reaction of porous solids, Sci. Sin. Chim., 42(2012), No. 8, p. 1210.
[37]	T. Mani, N. Mahinpey, and P. Murugan, Reaction kinetics and mass transfer studies of biomass char gasification with CO₂, Chem. Eng. Sci., 66(2011), No. 1, p. 36.
[38]	R.G. Kim, C.W. Hwang, and C.H. Jeon, Kinetics of coal char gasification with CO₂:Impact of internal/external diffusion at high temperature and elevated pressure, Appl. Energy, 129(2014), p. 299.
[39]	W. Huo, Z.J. Zhou, F.C. Wang, and G.S. Yu, Mechanism analysis and experimental verification of pore diffusion on coke and coal char gasification with CO₂, Chem. Eng. J., 244(2014), p. 227.
[40]	S.S. Vincent, N. Mahinpey, and A. Aqsha, Mass transfer studies during CO₂, gasification of torrefied and pyrolyzed chars, Energy, 67(2014), p. 319.
[41]	C. Chen, Mechanism and Numerical Simulation of Char Gasification in Mixtures of CO2 and H2O[Dissertation], Huazhong University of Science and Technology, Wuhan, 2013, p. 9.
[42]	X. Gao and D. Dollimore, The thermal decomposition of oxalates:Part 26. A kinetic study of the thermal decomposition of manganese(Ⅱ) oxalate dehydrate, Thermochim. Acta, 215(1993), p. 47.
[43]	P.F. Wu, H.H. He, J.A. Chen, Z.Q. Wen, J.P. Wang, and Y.H. Liang, Effects of alkali earth metal Ca adding ways on coke solution loss reaction, Coal Convers., 41(2018). No. 1, p. 54.