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Cost analysis of carbon capture and storage for current gas‐fired power plants in Nigeria
Author(s) -
Ugwuishiwu Boniface O.,
Nwakaire Joel N.,
Ohagwu Chukwuemeka J.
Publication year - 2019
Publication title -
greenhouse gases: science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.45
H-Index - 32
ISSN - 2152-3878
DOI - 10.1002/ghg.1855
Subject(s) - retrofitting , tonne , capital cost , electricity , environmental science , carbon capture and storage (timeline) , cost analysis , energy storage , fossil fuel , waste management , environmental engineering , engineering , power (physics) , electrical engineering , physics , operations research , ecology , structural engineering , climate change , quantum mechanics , biology
This study examined the cost of adopting carbon capture and storage (CCS) as a technology when retrofitting current gas‐fired plants in Nigeria to reduce CO 2 emissions. Studies show that Nigeria has abandoned or depleted oil fields; it has large coal reserves that are potential sites for CO 2 storage. Five power plants with capacities of 1074, 675, 624, 480, and 191 MW were studied using the Integrated Environmental Control Model (IECM) 9.5. The IECM 9.5 was calibrated using available data and some default values to model the performance and cost of retrofitting the power plants. The transport and storage system chosen was pipeline and enhance oil recovery (EOR). The results show that net plant efficiency, CO 2 emission rate, quantity of CO 2 captured, and CCS energy penalty are 35.78 ± 1.69%, 0.0668 ± 0.0138 kg MWh −1 , 0.4478 ± 0.0274 kg MWh −1 , and 0.2588 ± 0.0386%, respectively. The results also show that total capital requirement, cost of electricity, and percentage increase in cost of electricity were 1888.2 ± 336.9 $ kW −1 , 114.44 ± 10.15 $ MWh −1 , and 52.04 ± 3.58%, respectively. In the same manner, the cost of CO 2 avoided, cost of capture, and added cost of CCS were 84.442 ± 27.73 $ MWh −1 , 60.02 ± 22.51 $ tonne −1 , and 28.44 ± 10.16 $ MWh −1 , respectively. Further analysis shows that it would be advantageous to retrofit 1074 MW plants because this has a 46.51% increase in cost, which is lower than the cost for the other retrofitted plants. The total CO 2 emission rate dropped from 0.4282 ± 0.014 to 0.0668 ± 0.0138 kg MWh −1 ; this drop is significant as it shows that CCS can reduce the amount of CO 2 emitted from Nigeria. The study recommends that CCS is a viable CO 2 emission‐reduction alternative but incentives must be put in place to cushion the high cost of electricity. © 2019 Society of Chemical Industry and John Wiley & Sons, Ltd.