Kinetics of Co2 with Primary and Secondary Amines in Aqueous Solutions-i. Zwitterion Deprotonation Kinetics for Dea and Dipa in Aqueous Blends of Alkanolamines
نویسندگان
چکیده
The deprotonation kinetics of the DEA--C02 and the DIPA-COZ zwitterions have been studied in aqueous blends of an&es at 298 K. Amine mixtures investigated were: DEA-TEA, DEA-MDEA. DEL-DMMEA, DEA-DEMEA, DIPA-TEA, DIPA-MDEA, DIPA-DMME~ DIPA-DEMEA. FOG each blend the zwitterion deprotonation constant of the additonal base present in solution (i.e. the tertiary amine) was determined. The observed deprotonation rate constants for the DEA-zwitterion and for the DIPA-zwitterion could be summarized in two Brensted-type relationships. These relationships can be used to estimate the overall reaction rate of CO2 with DEA 0; bIPA in aqudous blends of am&s. The present work on the zwitterion deprotonation kinetics of the reaction of CO, with DEA and DIPA in aqueous amine blends provides additional verification for the validity of the &itterion mechanism prop&d by Caplow (1968) for the description of the reaction between CO, and primary and secondary alkanolamines.
منابع مشابه
Kinetics of COS Amines with Primary and Secondary in Aqueous Solutions
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