A simple model for the prediction of CO2 solubility in H2O-NaCl system at geological sequestration conditions

N. A. Darwish, Nidal Hilal

    Research output: Contribution to journalArticle

    Abstract

    Carbon dioxide (CO2) released in the atmosphere is the principal cause of the so-called global warming or greenhouse phenomenon. One procedure for the mitigation of CO2 consists of the capture, transport and geological storage (sequestration) of the gas in deep saline aquifers. In this work, a model for predicting CO2 solubility in H2O-NaCl system covering conditions typically encountered in geological sequestration (e.g., 300-500 K, 50-2000 bar, and 1-4 mol salt/kg) has been developed and validated by comparison with available experimental and theoretical data. Themodel is a simple one with four adjustable parameters that is based on an extension of the well-known Setschenov model [Kgs /Kg0=(P/P0)f(Tr,m) with f(Tr,m)=(0.461+0.078 m) (-1+Tr/(1.0+0.1267 m)]. The model is developed by exploiting interesting features in the behavior of solubility data of CO2 in saline water over the above-mentioned ranges of conditions. The model is capable of predicting CO2 solubility in saline water with accuracy comparable to that made by multi-parameter models (having 20 parameters or more). It is also in very good agreement with the available experimental data with root-mean-squared-error (RMSE) in the range of 0.03-0.225 mol CO2/kg H2O. The extrapolative power of the model is acceptable at both ends of its range of applicability.

    Original languageEnglish (US)
    Pages (from-to)114-118
    Number of pages5
    JournalDesalination
    Volume260
    Issue number1-3
    DOIs
    StatePublished - Jan 1 2010

    Fingerprint

    solubility
    Solubility
    prediction
    Saline water
    Greenhouses
    Global warming
    Aquifers
    Carbon Dioxide
    global warming
    Carbon dioxide
    mitigation
    Salts
    carbon dioxide
    Gases
    aquifer
    salt
    water
    atmosphere
    gas
    parameter

    Keywords

    • Salting out
    • Sequestration
    • Setschenov model
    • Solubility

    ASJC Scopus subject areas

    • Chemistry(all)
    • Chemical Engineering(all)
    • Materials Science(all)
    • Water Science and Technology
    • Mechanical Engineering

    Cite this

    A simple model for the prediction of CO2 solubility in H2O-NaCl system at geological sequestration conditions. / Darwish, N. A.; Hilal, Nidal.

    In: Desalination, Vol. 260, No. 1-3, 01.01.2010, p. 114-118.

    Research output: Contribution to journalArticle

    @article{8e5b54a9494e4351a86716a7e06961c4,
    title = "A simple model for the prediction of CO2 solubility in H2O-NaCl system at geological sequestration conditions",
    abstract = "Carbon dioxide (CO2) released in the atmosphere is the principal cause of the so-called global warming or greenhouse phenomenon. One procedure for the mitigation of CO2 consists of the capture, transport and geological storage (sequestration) of the gas in deep saline aquifers. In this work, a model for predicting CO2 solubility in H2O-NaCl system covering conditions typically encountered in geological sequestration (e.g., 300-500 K, 50-2000 bar, and 1-4 mol salt/kg) has been developed and validated by comparison with available experimental and theoretical data. Themodel is a simple one with four adjustable parameters that is based on an extension of the well-known Setschenov model [Kgs /Kg0=(P/P0)f(Tr,m) with f(Tr,m)=(0.461+0.078 m) (-1+Tr/(1.0+0.1267 m)]. The model is developed by exploiting interesting features in the behavior of solubility data of CO2 in saline water over the above-mentioned ranges of conditions. The model is capable of predicting CO2 solubility in saline water with accuracy comparable to that made by multi-parameter models (having 20 parameters or more). It is also in very good agreement with the available experimental data with root-mean-squared-error (RMSE) in the range of 0.03-0.225 mol CO2/kg H2O. The extrapolative power of the model is acceptable at both ends of its range of applicability.",
    keywords = "Salting out, Sequestration, Setschenov model, Solubility",
    author = "Darwish, {N. A.} and Nidal Hilal",
    year = "2010",
    month = "1",
    day = "1",
    doi = "10.1016/j.desal.2010.04.056",
    language = "English (US)",
    volume = "260",
    pages = "114--118",
    journal = "Desalination",
    issn = "0011-9164",
    publisher = "Elsevier",
    number = "1-3",

    }

    TY - JOUR

    T1 - A simple model for the prediction of CO2 solubility in H2O-NaCl system at geological sequestration conditions

    AU - Darwish, N. A.

    AU - Hilal, Nidal

    PY - 2010/1/1

    Y1 - 2010/1/1

    N2 - Carbon dioxide (CO2) released in the atmosphere is the principal cause of the so-called global warming or greenhouse phenomenon. One procedure for the mitigation of CO2 consists of the capture, transport and geological storage (sequestration) of the gas in deep saline aquifers. In this work, a model for predicting CO2 solubility in H2O-NaCl system covering conditions typically encountered in geological sequestration (e.g., 300-500 K, 50-2000 bar, and 1-4 mol salt/kg) has been developed and validated by comparison with available experimental and theoretical data. Themodel is a simple one with four adjustable parameters that is based on an extension of the well-known Setschenov model [Kgs /Kg0=(P/P0)f(Tr,m) with f(Tr,m)=(0.461+0.078 m) (-1+Tr/(1.0+0.1267 m)]. The model is developed by exploiting interesting features in the behavior of solubility data of CO2 in saline water over the above-mentioned ranges of conditions. The model is capable of predicting CO2 solubility in saline water with accuracy comparable to that made by multi-parameter models (having 20 parameters or more). It is also in very good agreement with the available experimental data with root-mean-squared-error (RMSE) in the range of 0.03-0.225 mol CO2/kg H2O. The extrapolative power of the model is acceptable at both ends of its range of applicability.

    AB - Carbon dioxide (CO2) released in the atmosphere is the principal cause of the so-called global warming or greenhouse phenomenon. One procedure for the mitigation of CO2 consists of the capture, transport and geological storage (sequestration) of the gas in deep saline aquifers. In this work, a model for predicting CO2 solubility in H2O-NaCl system covering conditions typically encountered in geological sequestration (e.g., 300-500 K, 50-2000 bar, and 1-4 mol salt/kg) has been developed and validated by comparison with available experimental and theoretical data. Themodel is a simple one with four adjustable parameters that is based on an extension of the well-known Setschenov model [Kgs /Kg0=(P/P0)f(Tr,m) with f(Tr,m)=(0.461+0.078 m) (-1+Tr/(1.0+0.1267 m)]. The model is developed by exploiting interesting features in the behavior of solubility data of CO2 in saline water over the above-mentioned ranges of conditions. The model is capable of predicting CO2 solubility in saline water with accuracy comparable to that made by multi-parameter models (having 20 parameters or more). It is also in very good agreement with the available experimental data with root-mean-squared-error (RMSE) in the range of 0.03-0.225 mol CO2/kg H2O. The extrapolative power of the model is acceptable at both ends of its range of applicability.

    KW - Salting out

    KW - Sequestration

    KW - Setschenov model

    KW - Solubility

    UR - http://www.scopus.com/inward/record.url?scp=77954429857&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=77954429857&partnerID=8YFLogxK

    U2 - 10.1016/j.desal.2010.04.056

    DO - 10.1016/j.desal.2010.04.056

    M3 - Article

    VL - 260

    SP - 114

    EP - 118

    JO - Desalination

    JF - Desalination

    SN - 0011-9164

    IS - 1-3

    ER -