Open AccessCoal Char Kinetics of Oxidation and Gasification Reactions
Author(s) -
Robert Lewtak,
Jarosław Hercog
Publication year - 2017
Publication title -
chemical and process engineering new frontiers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.188
H-Index - 20
eISSN - 2300-1925
pISSN - 0208-6425
DOI - 10.1515/cpe-2017-0011
Subject(s) - char , pulverized coal fired boiler , combustion , drop (telecommunication) , materials science , coal , kinetic energy , tube furnace , kinetics , thermodynamics , chemical engineering , chemistry , mechanics , engineering , organic chemistry , mechanical engineering , physics , quantum mechanics
Experimental investigations and numerical simulations have been conducted in this study to derive and test the values of kinetic parameters describing oxidation and gasification reactions between char carbon and O2 and CO2 occurring at standard air and oxy-fuel combustion conditions. Experiments were carried out in an electrically heated drop-tube at heating rates comparable to fullscale pulverized fuel combustion chambers. Values of the kinetic parameters, obtained by minimization of the difference between the experimental and modeled values of char burnout, have been derived and CFD simulations reproducing the experimental conditions of the drop tube furnace confirmed proper agreement between numerical and experimental char burnout
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