%0 Journal Article %A Liu, Jingzhang %A Li, Baihang %A Zhu, Jianguo %D 2018 %T Investigation on Pulverized Coal Char Oxy-Combustion Behavior at Moderate and High Temperatures: Experiments and a Novel Developed Kinetics Modeling %U https://acs.figshare.com/articles/journal_contribution/Investigation_on_Pulverized_Coal_Char_Oxy-Combustion_Behavior_at_Moderate_and_High_Temperatures_Experiments_and_a_Novel_Developed_Kinetics_Modeling/7016744 %R 10.1021/acs.iecr.8b02428.s001 %2 https://acs.figshare.com/ndownloader/files/12891161 %K kinetic %K 1273 K %K air-char combustion behaviors %K carbon dioxide %K gasification %K investigation %K FT %K CO %K rate ratio %K 1773 K %K Pulverized Coal Char Oxy-Combustion Behavior %K model %X In oxyfuel combustion with temperature higher than ash flowing temperature (FT), both chemical interactions between the char gasification reaction with carbon dioxide, that is, C+CO2 → 2CO, and the char oxidation reaction with oxygen, that is, C + (2-f)/2O2 → fCO + (1-f)­CO2, are needed for further investigation. Both experiments and a novel developed kinetics model compared with three previous kinetics models are implemented to investigate oxy- and air-char combustion behaviors. Results show that in high temperature the maximum burning rate ratio as 34.8% from gasification is smaller than that as 47.1% in moderate temperature for inner pore reduction induced by ash mineral melting. The char mean consumption rate of sole gasification with carbon dioxide in 1773 K is 1.25 times to that in 1273 K, but this burning rate under 27%O2/CO2 is 0.69 times to that in 1273 K. The mean burning rate ratio of char gasification increases from 28.0% to 40.0% in 1273 K and 1773 K, respectively. %I ACS Publications