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    CO2capture using piperazine-promoted, aqueous ammonia solution: Rate-based modelling and process simulation

    Access Status
    Fulltext not available
    Authors
    Lu, R.
    Li, K.
    Chen, J.
    Yu, H.
    Tade, Moses
    Date
    2017
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Lu, R. and Li, K. and Chen, J. and Yu, H. and Tade, M. 2017. CO2capture using piperazine-promoted, aqueous ammonia solution: Rate-based modelling and process simulation. International Journal of Greenhouse Gas Control. 65: pp. 65-75.
    Source Title
    International Journal of Greenhouse Gas Control
    DOI
    10.1016/j.ijggc.2017.08.018
    ISSN
    1750-5836
    Faculty
    Faculty of Science and Engineering
    URI
    http://hdl.handle.net/20.500.11937/58180
    Collection
    • Curtin Research Publications
    Abstract

    © 2017 Elsevier Ltd Due to the fast reaction rate of piperazine (PZ) with CO 2 , it has the potential to act as a promoter in aqueous ammonia (NH 3 )-based CO 2 capture processes. We have developed a rigorous, rate-based model for the NH 3 –PZ–CO 2 –H 2 O system using Aspen Plus ® , and validated the model against experimental results. Absorption and desorption processes were simulated under real flue gas conditions to gain a practical understanding of the behaviour and characteristics of interactions between PZ-promoted NH 3 solution and CO 2 . Adding PZ significantly increased the CO 2 absorption rate in the NH 3 -based CO 2 capture process via a fast reaction between PZ carbamate and CO 2 . The temperature along the column was higher than in the absence of PZ, and more free ammonia was released into the solution, which led to higher ammonia loss. Adding PZ also reduced the stripping heat, resulting in a smaller energy requirement for solvent regeneration.

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