13C-NMR spectroscopic study on chemical species in piperazine-amine-CO 2-H 2O system before and after heating

Miho Nitta, Masaki Hirose, Toru Abe, Yukio Furukawa, Hiroshi Sato, Yasuro Yamanaka

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

    8 Citations (Scopus)

    Abstract

    Chemical reactions associated with the absorption of CO 2 into aqueous solutions of blends of piperazine (PZ) with N-methyldiethanolamine (MDEA), etc. were studied by 13C-NMR spectroscopy. The coexistence of PZ and MDEA enhanced the initial apparent rate of HCO - 3 /CO 2- 3 formation. This result can be explained by considering that PZ monocarbamate rapidly formed works as an organocatalyst in the formation reaction of HCO - 3 . Concentration changes of chemical species in CO 2-absorbed aqueous amine solutions upon heating (80 °C, 30 min) were studied by 13C-NMR spectroscopy. Carbon dioxide regeneration originates mainly from HCO - 3 /CO 2- 3, and not from carbamate and carbonate.

    Original languageEnglish
    Title of host publicationEnergy Procedia
    Pages869-876
    Number of pages8
    Volume37
    DOIs
    Publication statusPublished - 2013
    Event11th International Conference on Greenhouse Gas Control Technologies, GHGT 2012 - Kyoto, Japan
    Duration: 2012 Nov 182012 Nov 22

    Other

    Other11th International Conference on Greenhouse Gas Control Technologies, GHGT 2012
    CountryJapan
    CityKyoto
    Period12/11/1812/11/22

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    Keywords

    • C-NMR
    • Amine
    • Carbamate
    • Carbon dioxide
    • Piperazine

    ASJC Scopus subject areas

    • Energy(all)

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