TY - JOUR
T1 - Numerical investigation on combustion of coal volatiles under various O 2/CO 2 mixtures using a detailed mechanism with soot formation
AU - Wijayanta, Agung Tri
AU - Saiful Alam, Md
AU - Nakaso, Koichi
AU - Fukai, Jun
N1 - Funding Information:
This research work was partially supported by NEDO Project under the Project of Innovative Zero-emission Coal Gasification Power Generation. The authors also gratefully acknowledge a grant from the Global Center of Excellence on Novel Carbon Resource Sciences, Kyushu University.
PY - 2012/3
Y1 - 2012/3
N2 - The effort for increasing syngas production and reducing soot and CO 2 emissions from coal combustion is important for cleaner and more efficient use of coal for energy production. The primary reactions of coal volatiles for soot formation mechanism were numerically investigated under pyrolysis (thermal decomposition), partial oxidation (O 2 gasification) and O 2/CO 2 gasification conditions. Soot formation was modeled in a plug flow reactor (PFR) with a detailed reaction mechanism containing 276 species, 2158 conventional gas phase reactions and 1635 surface phase reactions. The reaction temperature and pressure were maintained in the range 1273-1873 K and 0.1-2 MPa, respectively. The effect of temperature on product concentrations appeared more significant compared with pressure effect. In the viewpoint of special attention regarding O 2/CO 2 blown gasification, the effect of O 2/CO 2 input on the production of major combustion species was investigated. The O 2 input became important in reducing PAHs/soot at low temperature. However, if the gas mixture input had a high CO 2 concentration, higher temperature and pressure provided in eliminated PAHs/soot and increased CO.
AB - The effort for increasing syngas production and reducing soot and CO 2 emissions from coal combustion is important for cleaner and more efficient use of coal for energy production. The primary reactions of coal volatiles for soot formation mechanism were numerically investigated under pyrolysis (thermal decomposition), partial oxidation (O 2 gasification) and O 2/CO 2 gasification conditions. Soot formation was modeled in a plug flow reactor (PFR) with a detailed reaction mechanism containing 276 species, 2158 conventional gas phase reactions and 1635 surface phase reactions. The reaction temperature and pressure were maintained in the range 1273-1873 K and 0.1-2 MPa, respectively. The effect of temperature on product concentrations appeared more significant compared with pressure effect. In the viewpoint of special attention regarding O 2/CO 2 blown gasification, the effect of O 2/CO 2 input on the production of major combustion species was investigated. The O 2 input became important in reducing PAHs/soot at low temperature. However, if the gas mixture input had a high CO 2 concentration, higher temperature and pressure provided in eliminated PAHs/soot and increased CO.
KW - Coal volatiles
KW - O /CO blown gasification
KW - Polycyclic aromatic hydrocarbon
KW - Reaction mechanism
KW - Soot
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U2 - 10.1016/j.fuel.2011.10.003
DO - 10.1016/j.fuel.2011.10.003
M3 - Article
AN - SCOPUS:84855977048
SN - 0016-2361
VL - 93
SP - 670
EP - 676
JO - Fuel
JF - Fuel
ER -