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    Aqueous ammonia and amino acid salts blends for CO2 capture

    Access Status
    Fulltext not available
    Authors
    Yang, N.
    Xu, D.
    Yang, Q.
    Wardhaugh, L.
    Feron, P.
    Li, K.
    Tade, Moses
    Yu, J.
    Wang, S.
    Yu, H.
    Date
    2013
    Type
    Conference Paper
    
    Metadata
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    Citation
    Yang, N. and Xu, D. and Yang, Q. and Wardhaugh, L. and Feron, P. and Li, K. and Tade, M. et al. 2013. Aqueous ammonia and amino acid salts blends for CO2 capture, in 30th Annual International Pittsburgh Coal Conference (PCC), Sep 15-18 2013, pp. 1737-1751. Bejing, China: CAE and NIE.
    Source Title
    30th Annual International Pittsburgh Coal Conference 2013, PCC 2013
    Faculty
    Faculty of Science and Engineering
    URI
    http://hdl.handle.net/20.500.11937/5159
    Collection
    • Curtin Research Publications
    Abstract

    Aqueous ammonia (NH3) is considered as a promising alternative to amine based absorbents for CO2 absorption. However, aqueous ammonia has low absorption rate for CO2 capture and ammonia itself is volatile. To enhance CO2 absorption rate in aqueous ammonia, a number of amino acid salts were investigated as the potential promoter due to their high reaction rates with CO2 and lower vapour pressure. According to pKa values of amino acids and screening test results of amino acid salts in the presence and absence of ammonia, potassium salts of sarcosine, proline and taurine were selected for further study in this work. It has been found that the overall gas phase mass transfer coefficients of CO2 in ammonia blended with amino acid salts are much higher than those in ammonia alone. However, ammonia loss increases with introduction of amino acid salts.

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