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Investigation on thermal behavior and sulfur release characteristics from rice husk and bituminous coal co‐firing under O 2 /CO 2 atmosphere
Author(s) -
Huang Yaji,
Zhang Lihui,
Duan Feng
Publication year - 2015
Publication title -
asia‐pacific journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.348
H-Index - 35
eISSN - 1932-2143
pISSN - 1932-2135
DOI - 10.1002/apj.1941
Subject(s) - char , coal , combustion , bituminous coal , husk , tube furnace , chemistry , thermogravimetric analysis , oxygen , sulfur , thermal decomposition , materials science , chemical engineering , metallurgy , waste management , organic chemistry , botany , engineering , biology
The synergistic interaction of rice husk (RH), Huaibei bituminous coal (HB coal), and their blends was investigated under O 2 /CO 2 combustion condition by thermogravimetric analysis. The RH was blended with HB coal in the range of 20–40 wt% to investigate the co‐combustion profile. Meanwhile, a horizontal tube furnace was used to study the sulfur release characteristics of blended fuels under O 2 /CO 2 atmosphere. Results showed that the synergistic interaction between RH and HB coal improved the char catalytic effect and alkali metals melt‐induced effect on the decomposition of HB coal. Burnout temperature ( T b ) of blended fuels decreases significantly with an increase of RH ratio and oxygen ratio, ignition temperature ( T i ) decreases with increases of RH ratio, while there is a minor decrease in T i at higher oxygen ratio. Combustion characteristic indexes of blended fuel increase with an increase of RH ratio and oxygen ratio. The SO 2 peak values decrease with increases of RH ratio, and increase with an increase of oxygen ratio and temperature. However, the mean SO 2 emissions and fuel‐S conversions show the inverse trend. © 2015 Curtin University of Technology and John Wiley & Sons, Ltd.