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http://yadda.icm.edu.pl:80/baztech/element/bwmeta1.element.baztech-7b58bf84-c286-4cfc-988f-b3d0d994d72e

Czasopismo

Archivum Combustionis

Tytuł artykułu

On the oxygen-enriched combustion of a single coal char particle

Autorzy Lewtak, R.  Milewska, A. 
Treść / Zawartość http://archcomb.itc.pw.edu.pl/
Warianty tytułu
Języki publikacji EN
Abstrakty
EN The paper presents numerical results of single coal char particle combustion in the oxygen-enriched environment at which the effect of the equimolar and non-equimolar counterdiffusion has been taken into consideration. Usually, the phenomenon of the non-equimolar counterdiffusion arising at combustion of char particles is neglected and superseded by the equimolar counterdiffusion. Such a replacement can lead to results, e.g. profiles of particle temperature and species concentrations, which do not agree with the real process. First, the phenomenon of the equimolar and non-equimolar counterdiffusion for a single spherical particle is explained in detail. Next, the governing equations of single char particle combustion are presented. Finally, numerical simulations have been performed at O2 mole fractions of 26%, 36% and 46% for the particle size of dp = 160 μm and gas temperature of 1373 K. Numerical results, e.g. profiles of char burnout, temperature, molar fractions at the particle surface, show the significant influence of the non-equimolar counterdiffusion on the combustion.
Słowa kluczowe
EN non-equimolar counterdiffusion   oxygen-enriched combustion   char particle combustion  
Wydawca Komitet Termodynamiki i Spalania PAN
Czasopismo Archivum Combustionis
Rocznik 2015
Tom Vol. 35 nr 1
Strony 21--28
Opis fizyczny Bibliogr. 17 poz., rys., tab.
Twórcy
autor Lewtak, R.
autor Milewska, A.
  • Department of Thermal Processes Institute of Power Engineering Augustowka 36, 02-981 Warsaw, Poland
Bibliografia
[1] Hurt R.H., Calo J.M., Semi–global intrinsic kinetics for char combustion modeling, Combust Flame 125, 2001, pp. 1138–1149.
[2] Hurt R.H., Haynes B.S., On the origin of power-law kinetics in carbon oxidation, Proc. Comb Ins. 30, 2005, pp. 2161–2168.
[3] Paterson W.R., Mass transfer to and reaction on a sphere immersed in a stationary or flowing gas, Chem Eng Sc 55, 2000, pp. 3567–3570.
[4] Patisson F., et al., A non-isothermal, non-equimolar transient kinetic model for gas-solid reactions, Chem Eng Sc 53, 1998, pp. 697–708.
[5] Lewtak R., Milewska A., Application of different diffusion approaches in oxy-fuel combustion of single coal char particles, Fuel 113, 2013, pp. 844–853.
[6] Scala F., Calculation of the mass transfer coefficient for the combustion of a carbon particle, Combust Flame 157, 2010, pp. 137–142.
[7] Newman J., Stefan–Maxwell mass transport, Chem Eng Sc 64, (2009), pp. 4796–4803.
[8] Zeng T., Fu W.B., The ratio CO/CO2 of oxidation on a burning carbon surface, Combust Flame 107, 1996, pp. 197–210.
[9] Smith I.W., The combustion rates of coal chars: A review, Symposium (Int) on Combustion 19, 1982, pp. 1045–1065.
[10] Smoot L.D., Smith P.J., Coal combustion and gasification, Plenum Chemical Engineering Series, Springer, 1985.
[11] Shaddix C.R., et al., Numerical assessment of Tognotti determination of CO2/CO production ratio during char oxidation, Combust Flame 160, pp.1827–1834, 2013.
[12] Shampine L.F., et al., Solving index-1 DAEs in MATLAB and Simulink, SIAM Review 41, 1999, pp. 538–552.
[13] Shampine L.F., Reichelt M.W., The MATLAB ODE Suite, SIAM Journal on Scientific Computing 18, 1997, pp. 1–22.
[14] Levenberg K., A method for the solution of certain problems in least squares, Quart. Appl. Math. 2, 1944, pp. 164–168.
[15] Marquardt D., An algorithm for least-squares estimation of nonlinear parameters, SIAM J. Appl. Math., 11, 1963, pp. 431–441.
[16] Hecht E.S., et al., Effect of CO2 gasification reaction on oxy-combustion of pulverized coal char, Proc Comb Inst 33, 2011, pp. 1699–1706.
[17] Murphy J.J., Shaddix C.R., Combustion kinetics of coal chars in oxygen-enriched environments, Combust Flame 144, 2006, pp. 710–729.
Kolekcja BazTech
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