TY - JOUR
T1 - Achievement of high CO2 concentration in the flue gas at slightly positive pressure during oxy-coal combustion in a 300 kWth furnace
AU - Chi, Chung Cheng
AU - Lin, Ta Hui
AU - Huang, Wei Cheng
AU - Hou, Shuhn Shyurng
AU - Wang, Pai Yi
PY - 2015/8/17
Y1 - 2015/8/17
N2 - Abstract This study explores the combustion characteristics of a 300 kWth air-firing furnace adapted for oxy-firing combustion. The influences of operating pressure and oxygen/recycled flue gas (RFG) blend ratio on the combustion characteristics of oxy-coal firing were examined, especially on the exhausted CO2 concentration. High purity CO2 (94.1%) at the exit of the system was achieved for oxy-coal combustion at the optimized operation conditions (i.e., an RFG flow rate of 227 Nm3/h, feeding rates of oxygen and coal of 42.5 Nm3/h and 21 kg/h, respectively, and a slightly positive pressure of +100 Pa). The achievement of 94.1% CO2 emission has great potential for reducing CO2 emissions by carbon capture and storage and thus mitigating global climate change. Moreover, compared with air-firing operation, an NO emission reduction of around 66% was obtained in the oxy-firing operation.
AB - Abstract This study explores the combustion characteristics of a 300 kWth air-firing furnace adapted for oxy-firing combustion. The influences of operating pressure and oxygen/recycled flue gas (RFG) blend ratio on the combustion characteristics of oxy-coal firing were examined, especially on the exhausted CO2 concentration. High purity CO2 (94.1%) at the exit of the system was achieved for oxy-coal combustion at the optimized operation conditions (i.e., an RFG flow rate of 227 Nm3/h, feeding rates of oxygen and coal of 42.5 Nm3/h and 21 kg/h, respectively, and a slightly positive pressure of +100 Pa). The achievement of 94.1% CO2 emission has great potential for reducing CO2 emissions by carbon capture and storage and thus mitigating global climate change. Moreover, compared with air-firing operation, an NO emission reduction of around 66% was obtained in the oxy-firing operation.
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U2 - 10.1016/j.fuel.2015.08.001
DO - 10.1016/j.fuel.2015.08.001
M3 - Article
AN - SCOPUS:84939249059
VL - 160
SP - 434
EP - 439
JO - Fuel
JF - Fuel
SN - 0016-2361
M1 - 9515
ER -