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    Influence of Regenerated Monoethylene Glycol on Natural Gas Hydrate Formation

    Access Status
    Fulltext not available
    Authors
    AlHarooni, Khalifa
    Gubner, Rolf
    Iglauer, Stefan
    Pack, D.
    Barifcani, Ahmed
    Date
    2017
    Type
    Journal Article
    
    Metadata
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    Citation
    AlHarooni, K. and Gubner, R. and Iglauer, S. and Pack, D. and Barifcani, A. 2017. Influence of Regenerated Monoethylene Glycol on Natural Gas Hydrate Formation. Energy and Fuels. 31 (11): pp. 12914-12931.
    Source Title
    Energy and Fuels
    DOI
    10.1021/acs.energyfuels.7b01539
    ISSN
    0887-0624
    School
    School of Chemical and Petroleum Engineering
    URI
    http://hdl.handle.net/20.500.11937/63050
    Collection
    • Curtin Research Publications
    Abstract

    The key objective of this study is to investigate the efficiency of thermodynamic hydrate inhibition of monoethylene glycol (MEG) solutions collected from a MEG regeneration/reclamation pilot plant, simulating six scenarios of the start-up and clean-up phases of a typical gas field. The scenarios contain complex solutions of condensates, drilling muds/well completion fluids with high concentrations of divalent-monovalent ions, particulates, and various production chemicals, which can result in various system upsets in a MEG plant. MEG was regenerated and reclaimed at a recently constructed closed-loop MEG pilot plant that replicates a typical field plant. During MEG plant operation, feed-rich MEG is separated, cleaned, and heated so that water in it is evaporated and purified for reuse. In this study, equilibrium conditions of natural gas hydrates in the presence of 20 wt % of regenerated and reclaimed MEG solution at a pressure range of 65-125 bar were reported. The equilibrium data were measured in a PVT sapphire cell unit using an isochoric temperature search method. The measured data were compared with the literature and theoretical predictions to investigate the influence of regenerated/reclaimed MEG on gas hydrate inhibition performance. A better understanding of the efficiency of regenerated complex MEG solutions on hydrate phase equilibria forms a basis for improved system design, operations, and calculating required MEG dosages for hydrate inhibition.

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