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    Technoeconomic Assessment of an Advanced Aqueous Ammonia-Based Postcombustion Capture Process Integrated with a 650-MW Coal-Fired Power Station

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    Fulltext not available
    Authors
    Li, K.
    Yu, H.
    Yan, S.
    Feron, P.
    Wardhaugh, L.
    Tade, Moses
    Date
    2016
    Type
    Journal Article
    
    Metadata
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    Citation
    Li, K. and Yu, H. and Yan, S. and Feron, P. and Wardhaugh, L. and Tade, M. 2016. Technoeconomic Assessment of an Advanced Aqueous Ammonia-Based Postcombustion Capture Process Integrated with a 650-MW Coal-Fired Power Station. Environmental Science and Technology. 50 (19): pp. 10746-10755.
    Source Title
    Environmental Science and Technology
    DOI
    10.1021/acs.est.6b02737
    ISSN
    0013-936X
    Faculty
    Faculty of Science and Engineering
    URI
    http://hdl.handle.net/20.500.11937/28340
    Collection
    • Curtin Research Publications
    Abstract

    Using a rigorous, rate-based model and a validated economic model, we investigated the technoeconomic performance of an aqueous NH3-based CO2 capture process integrated with a 650-MW coal-fired power station. First, the baseline NH3 process was explored with the process design of simultaneous capture of CO2 and SO2 to replace the conventional FGD unit. This reduced capital investment of the power station by US425/kW (a 13.1% reduction). Integration of this NH3 baseline process with the power station takes the CO2-avoided cost advantage over the MEA process (US67.3/tonne vs US86.4/tonne). We then investigated process modifications of a two-stage absorption, rich-split configuration and interheating stripping to further advance the NH3 process. The modified process reduced energy consumption by 31.7 MW/h (20.2% reduction) and capital costs by US55.4 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 CO2 compared with the NH3 baseline and advanced MEA process, respectively. The analysis of energy breakdown and cost distribution indicates that the technoeconomic performance of the NH3 process still has great potential to be improved.

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