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    On the buffer capacity of CO2-charged seawater used for carbonation and subsequent mineral sequestration

    183287_57033_wolff_boenisch_2011.pdf (259.7Kb)
    Access Status
    Open access
    Authors
    Wolff-Boenisch, Domenik
    Date
    2011
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Wolff-Boenisch, Domenik. 2011. On the buffer capacity of CO2-charged seawater used for carbonation and subsequent mineral sequestration. Energy Procedia. 4: pp. 3738-3745.
    Source Title
    Energy Procedia
    DOI
    10.1016/j.egypro.2011.02.307
    ISSN
    1876-6102
    School
    Department of Applied Geology
    Remarks

    This article is published under the Open Access publishing model and distributed under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by-nc-nd/3.0/. Please refer to the licence to obtain terms for any further reuse or distribution of this work.

    URI
    http://hdl.handle.net/20.500.11937/26469
    Collection
    • Curtin Research Publications
    Abstract

    Successful mineral trapping of carbon dioxide faces the challenge of effectively titrating a CO2-charged acidic injection solution to pH conditions favorable to carbonate precipitation -using the rock as primary alkalinity source. To illustrate the magnitude of this task, buffer capacities of seawater solutions equilibrated with different partial pressure of CO2 are presented, under open and closed conditions. A number of mechanisms can be evoked to overcome the large buffer intensity of the injection fluid, including dilution, dissolution kinetic catalysis and increasing reaction temperature. Buffer capacity – pH plots are presented to aid in understanding how buffer capacity changes as a function of the presence and concentration of key solutes, like fluoride.

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