Wind to ammonia: Electrochemical processes in room temperature ionic liquids

Ted M. Pappenfus, Kyung Mee Lee, Laura M. Thoma, Carly R. Dukart

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    18 Scopus citations

    Abstract

    In this project, an alternative approach to synthesize ammonia electrochemically from wind energy, nitrogen gas, and ethanol is reported. Initial electrolyses have been attempted using room temperature ionic liquids (RTILs) as the electrolyte solvent in the presence of lithium ions. Bis(trifluoromethanesulfonyl)imide salts of 1-Ethyl-3-methylimidizolium (EMI-TFSI) and 1-Butyl-1-methylpyrrolidinium (PYR14-TFSI) were tested in this investigation. These results are compared to the use of tetrahydrofuran as the solvent. The data suggests EMI-TFSI is not an appropriate ionic liquid for the lithium mediated reduction of N2, whereas the increased electrochemical stability of PYR14-TFSI offers greater promise. Current efficiencies (3.8%) for NH3 formation in THF are consistently higher than PYR14-TFSI at atmospheric temperatures and pressures. The amount of ammonia synthesized was quantified by performing the Berthelot reaction.

    Original languageEnglish (US)
    Title of host publicationECS Transactions - Molten Salts and Ionic Liquids 16 - 214th ECS Meeting
    Pages89-93
    Number of pages5
    Edition49
    DOIs
    StatePublished - Dec 1 2008
    EventMolten Salts and Ionic Liquids 16 - 214th ECS Meeting - Honolulu, HI, United States
    Duration: Oct 12 2008Oct 17 2008

    Publication series

    NameECS Transactions
    Number49
    Volume16
    ISSN (Print)1938-5862
    ISSN (Electronic)1938-6737

    Conference

    ConferenceMolten Salts and Ionic Liquids 16 - 214th ECS Meeting
    CountryUnited States
    CityHonolulu, HI
    Period10/12/0810/17/08

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  • Cite this

    Pappenfus, T. M., Lee, K. M., Thoma, L. M., & Dukart, C. R. (2008). Wind to ammonia: Electrochemical processes in room temperature ionic liquids. In ECS Transactions - Molten Salts and Ionic Liquids 16 - 214th ECS Meeting (49 ed., pp. 89-93). (ECS Transactions; Vol. 16, No. 49). https://doi.org/10.1149/1.3159311