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http://dx.doi.org/10.9713/kcer.2013.51.1.121

Thermal Behavior and Kinetics of Coal Blends during Devolatilization  

Ryu, Kwang-Il (Energy Conversion System Lab / Pusan Clean Coal Center, Department of Mechanical Engineering, Pusan National University)
Kim, Ryang-Gyoon (Energy Conversion System Lab / Pusan Clean Coal Center, Department of Mechanical Engineering, Pusan National University)
Li, Dong-Fang (Energy Conversion System Lab / Pusan Clean Coal Center, Department of Mechanical Engineering, Pusan National University)
Wu, Ze-Lin (Energy Conversion System Lab / Pusan Clean Coal Center, Department of Mechanical Engineering, Pusan National University)
Jeon, Chung-Hwan (Energy Conversion System Lab / Pusan Clean Coal Center, Department of Mechanical Engineering, Pusan National University)
Publication Information
Korean Chemical Engineering Research / v.51, no.1, 2013 , pp. 121-126 More about this Journal
Abstract
The objective of this research is to predict the TG curve of blends of bituminous coal and sub-bituminous coal during devolatilization. TSL (Thermal Shock Large) TGA was used for Experiments, and Coats-redfern method was used for reaction order calculation. Based on reaction order, sum method was verified to be suitable for a single coal, then, prediction and comparison of TG curve of coal blends was conducted using both of WSM (Weight Sum Method) and MWSM (Modified Weight Sum Method), where the latter was developed in this research. The presented experiment results and WSM & MWSM were showed to be reasonable using linear least square method. MWSM performed more accurately than WSM for the case that TG curve had different slopes and the case that sharp weight loss happened due to release of volatile matter. The results showed that it's possible to predict the thermal behavior of coal blends during devolatilization based on the thermal behavior of single coals.
Keywords
Coal Blend; WSM (Weight Sum Method); Devolatilization; Kinetics; TGA;
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Times Cited By KSCI : 1  (Citation Analysis)
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1 Makino, H., Ikeda, M., Morinaga, H. and Higashiyama, G., "Characteristic of Blended Combustion of Sub-bituminous Coal,"火力原子力發電(2003).
2 Korea Elecrtic Power Coperation, "Combustion Mana Gement Practices," Korea Power Learning Institute(2005).
3 Lee, B. H., Kim, S. G., Song, J. H., Chang, Y. J. and Jeon, C. H., "Influence of Coal Blending Methods on Unburned Carbon and NO Emissions in a Drop-Tube Furnace," Energy Fuels, 25, 5055-5062 (2011).   DOI   ScienceOn
4 Solomon, P. R., Serio, M. A., Hamblen, D. G., Yu, Z-Z. and Charpenay, S., "Advances in the FG-DVC Model of Coal Devolatilization," Div. Fuel Chem., 35, 479-488(1990).
5 Niksa, S. and Kerstein, A. R., "FLASHCHAIN Theory for Coal Devolatilization Kinetics. 1. Formulation," Energy Fuels, 5, 47- 665(1991).   DOI
6 Fletcher, T. H., Kerstein, A. R., Pugmire, R. J., Solum, M. S., and Grant, D. M., "A Chemical Percolation Model for Devolatilization: 3. Chemical Structure as a function of Coal Type," Energy Fuels, 6, 414(1992).   DOI
7 Badzioch, S. and Hawksley, P. G. W., "Kinetics of Thermal Decomposition of Pulverized Coal Particles," Ind. Enl. Chem. Process Des. Develop, 9, 521-530(1970).
8 Kobayashi, H., "Kinetics of Rapid Devolatilization of Pulverized Coal," Dept. of Mechanical Engineering, Mass. Inst. Technol., Sc. D., (1976).
9 Proony K. C. and Carl M. C., "Thermogravity Analysis of Cellulose," Polymer Chemistry, 6, 3217-233(1968).   DOI
10 Kim, R. G., Song, J. H., Lee, B. H., Chang, Y. J. and Jeon, C. H., "Application of a DAEM Method for a Comparison of Devoaltilization Kinetics of Imported Coals," Korean Chem. Eng. Res.(HWAHAK KONGHAK), 48, 110-115(2010).
11 Freeman, E. S. and Carrol, J., "The Application of Thermo-analytical Techniques to Reaction Kinetics," J. Phy Chem., 62, 394- 397(1958).   DOI
12 Coats, A. W. and Redfern, J. P., "Kinetic Parameter from Thermogravimetric Data," J. Polym. Sci., 3, 917-920(1965).   DOI
13 Akinwale, O. A., Marion, C., Edson, L. M., Johannes, H. K. and Johann, F. G., "Model Fitting Kinetic Analysis and Characterisation of the Devolatilization of Coal Blends with Corn and Sugarcane Residues," Thermochim. Acta, 530, 95-106(2012).   DOI   ScienceOn
14 Gil, M. V., Casal, D., Pevida, C., Pis, J. J. and Rubiera, F., "Thermal Behaviour and Kinetics of Coal/biomass Blends During Cocombustion," Bioresour. Technol., 101, 5601-5608(2010).   DOI   ScienceOn
15 Valerio, C., Luigi, P. and Leonardo, T., "Devolatilization and Pyrolysis of Refuse Derived Fuels: Characterization and Kinetic Modelling by a Thermo Gravi Metric and Calorimetric Approach," Fuel, 74(6), 903-912(1995).   DOI   ScienceOn
16 Vuthalura, H. B., "Investigations Into Pyrolytic Beha Viour of Coal/biomass Blends Using Thermo Gravimetric Analysis," Bioresour. Technol., 92, 187-195(2004).   DOI   ScienceOn
17 Heikkinen, J. M., Hordijk, J. C., De Jong, W. and Spliethoff, H., "Thermogravity as a Tool to Classify Waste Components to be Used for Energy Generation," J. Anal. Appl. Pyrolysis, 71, 883- 900(2004).   DOI   ScienceOn
18 Enrico, B., Federica, L., Luigi, P. and Leonardo, T., "Devolatilization Rate of Biomasses and Coal-biomass Blend: An Experimantal Investigation," Fuel, 81, 1041-1050(2002).   DOI   ScienceOn
19 Prompubess, C., Mekasut, L., Piumsomboon, P. and Kuchontara, P., "Co-combustion of Coal and Biomass in a Circulating Fluidized Bed Combustor," Korean J. Chem. Eng., 24(6), 989-995(2007).   과학기술학회마을   DOI   ScienceOn
20 Williams, A., Pourkashanian, M. and Jones, J. M., "The Combustion of Coal and Some Other Solid Fuels," Combustion Institude, 28, 2141-2162(2000).   DOI   ScienceOn
21 Stephen, R. T., "An Introduction to Combustion : Concept and Application," (1999).
22 Kim, R. G., Lee, B. H., Song, J. H., Chang, Y. J., Jeon, C. H., and Fletcher, T. H., "Comparison of Devolatilization of Pulverized Coals Utilized in Korean Power Plant using a DAEM Method," KISTI, 33, 613-621(2009).