Articles producció científica> Enginyeria Química

Physical Absorption of Green House Gases in Amines: The Influence of Functionality, Structure, and Cross-Interactions

  • Identification data

    Identifier: PC:2539
    Authors:
    Allan D. MackieGustavo A. OrozcoVeronique Lachet
    Abstract:
    DOI: 10.1021/acs.jpcb.6b09819 URL: http://pubs.acs.org/doi/abs/10.1021/acs.jpcb.6b09819 Filiació URV: SI Inclòs a la memòria: SI
  • Others:

    Author, as appears in the article.: Allan D. Mackie; Gustavo A. Orozco; Veronique Lachet
    Department: Enginyeria Química
    URV's Author/s: MACKIE, ALLAN DONALD; Gustavo A. Orozco; Veronique Lachet
    Keywords: carbon dioxide Chemical analysis greenhouse gases
    Abstract: Monte Carlo simulations were performed in the isothermal-isobaric ensemble (NPT) to calculate the Henry constants of methane (CH4), nitrous oxide (N2O), and carbon dioxide (CO2) in pure H2O, amines, and alkanolamines using the classical Lorentz-Berthelot combining rules (L-B). The Henry constants of N2O and CO2 in water are highly overestimated and motivated us to propose a new set of unlike interactions. Contrarily, the Henry constant of N2O in MEA is underestimated by around 40%, and again, a new reoptimized cross unlike parameter is able to reproduce the constant to within 10%. An analysis is given of the relationship between the physical absorption of these gases and the chemical structure or functionality of 12 molecules including amines and alkanolamines using the anisotropic united atom intermolecular potential (AUA4). Finally, the solubility of N2O in an aqueous solution of monoethanolamine (MEA) at 30% (wt) was also studied. A Henry constant within 7% of the experimental value was found by using the reoptimized parameters along with L-B to account for the MEA + H2O unlike interactions. This very good agreement without additional adjustments for the MEA + H2O system may be attributed to the good excess properties predictions found in previous works for the binary mixture (MEA + H2O). However, further work, including additional alkanolamines in aqueous solutions at several concentrations, is required to verify this particular point.
    Research group: Molecular simulation I: Complex Systems
    Thematic Areas: Enginyeria química Ingeniería química Chemical engineering
    licence for use: https://creativecommons.org/licenses/by/3.0/es/
    ISSN: 1520-6106
    Author identifier: 0000-0002-1819-7820; 0000-0002-4524-1540; n/a
    Record's date: 2017-01-19
    Last page: 13143
    Journal volume: 120
    Papper version: info:eu-repo/semantics/acceptedVersion
    Link to the original source: https://pubs.acs.org/doi/10.1021/acs.jpcb.6b09819
    Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
    Article's DOI: 10.1021/acs.jpcb.6b09819
    Entity: Universitat Rovira i Virgili
    Journal publication year: 2016
    First page: 13136
    Publication Type: Article Artículo Article
  • Keywords:

    Gasos d'efecte hivernacle -- Absorció i adsorció
    Etanolamines
    carbon dioxide
    Chemical analysis
    greenhouse gases
    Enginyeria química
    Ingeniería química
    Chemical engineering
    1520-6106
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