Technoeconomic Assessment of an Advanced Aqueous Ammonia-Based Postcombustion Capture Process Integrated with a 650-MW Coal-Fired Power Station.
Using a rigorous, rate-based model and a validated economic model, we investigated the technoeconomic performance of an aqueous NH3-based CO2capture process integrated with a 650-MW coal-fired power station. First, the baseline NH3process was explored with the process design of simultaneous capture of CO2and SO2to replace the conventional FGD unit. This reduced capital investment of the power station by US$425/kW (a 13.1% reduction). Integration of this NH3baseline process with the power station takes the CO2-avoided cost advantage over the MEA process (US$67.3/tonne vs US$86.4/tonne). We then investigated process modifications of a two-stage absorption, rich-split configuration and interheating stripping to further advance the NH3process. The modified process reduced energy consumption by 31.7 MW/h (20.2% reduction) and capital costs by US$55.4 million (6.7% reduction). As a result, the CO2-avoided cost fell to $53.2/tonne: a savings of $14.1 and $21.9/tonne CO2compared with the NH3baseline and advanced MEA process, respectively. The analysis of energy breakdown and cost distribution indicates that the technoeconomic performance of the NH3process still has great potential to be improved.
CSIRO Energy, 10 Murray Dwyer Circuit, Mayfield West, New South Wales 2304, Australia.|Department of Chemical Engineering, Curtin University of Technology Australia , GPO Box U1987, Perth, Western Australia 6845, Australia.
Kangkang
K
Li
CSIRO Energy, 10 Murray Dwyer Circuit, Mayfield West, New South Wales 2304, Australia.
Hai
H
Yu
College of Engineering, Huazhong Agricultural University , No. 1 Shizishan Street, Hongshan District, Wuhan 430070, PR China.
Shuiping
S
Yan
CSIRO Energy, 10 Murray Dwyer Circuit, Mayfield West, New South Wales 2304, Australia.
Paul
P
Feron
CSIRO Energy, 10 Murray Dwyer Circuit, Mayfield West, New South Wales 2304, Australia.
Leigh
L
Wardhaugh
Department of Chemical Engineering, Curtin University of Technology Australia , GPO Box U1987, Perth, Western Australia 6845, Australia.
Moses
M
Tade
D000641:Ammonia; D002245:Carbon Dioxide; D003031:Coal / Q000191:economics*; D011210:Power Plants / Q000191:economics; D014867:Water
D003031:Coal; D014867:Water; D002245:Carbon Dioxide; D000641:Ammonia