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    Effect of Dissolved Oxygen, Sodium Bisulfite, and Oxygen Scavengers on Methane Hydrate Inhibition

    Access Status
    Fulltext not available
    Authors
    Alef, Khalid
    Iglauer, Stefan
    Barifcani, Ahmed
    Date
    2018
    Type
    Journal Article
    
    Metadata
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    Citation
    Alef, K. and Iglauer, S. and Barifcani, A. 2018. Effect of Dissolved Oxygen, Sodium Bisulfite, and Oxygen Scavengers on Methane Hydrate Inhibition. Journal of Chemical & Engineering Data. 63 (5): pp. 1821-1826.
    Source Title
    Journal of Chemical & Engineering Data
    DOI
    10.1021/acs.jced.8b00150
    ISSN
    0021-9568
    School
    WASM: Minerals, Energy and Chemical Engineering (WASM-MECE)
    URI
    http://hdl.handle.net/20.500.11937/69301
    Collection
    • Curtin Research Publications
    Abstract

    © 2018 American Chemical Society. Numerous chemical additives are added to monoethylene glycol (MEG) injection streams to maintain and protect assets as well as to ensure steady production of hydrocarbons. Oxygen scavengers are injected for the purpose of lowering dissolved oxygen to levels that do not pose the risk of corrosion. In this study, the effect of dissolved oxygen and some oxygen scavengers on gas hydrate inhibition was investigated. Results reveal that high levels of dissolved oxygen may promote the formation of hydrates due to the reaction of dissolved oxygen with impurity components such as iron carbonate that may exist in the MEG solution, thus decreasing overall MEG quality. Sodium bisulfite had negligible effect on hydrate inhibition at low concentrations but showed greater inhibition performance at higher concentrations due to the electrostatic attraction between ions and water molecules. A proprietary oxygen scavenger showed hydrate promotion effect, which suggests that proprietary chemical additives should undergo extensive compatibility and risk analysis. An erythorbic acid-based oxygen scavenger showed minor inhibition performance albeit at small concentration, possibly due to hydrogen bonding between hydroxyl groups of its components with water molecules.

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