%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