Thermal Degradation Rate of 2-Amino-2-methyl-1-propanol to Cyclic 4,4-Dimethyl-1,3-oxazolidin-2-one: Experiments and Kinetics Modeling

Naser S. Matin, Jesse Thompson, Femke M. Onneweer, Kunlei Liu

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Employing experimental kinetics data collected in this study, a power law rate equation for the thermal degradation of 2-amino-2-methyl-1-propanol (AMP) to 4,4-dimethyl-1,3-oxazolidin-2-one (DMOZD) as a function of amine and CO2 concentration in the solution is introduced. The rate experiments were carried out at 120, 135, and 150 °C. Kinetic data was collected to extract the initial rate equation from aqueous solutions of 1.12, 1.68, 2.24, and 3.36 M, AMP and CO2 loadings from 0.17 to 0.7, molCO2/molAMP. Since the rate equation is based on the initial reactions in the solution, the output from the kinetic model can be used to estimate the thermal degradation rate of AMP as a whole and DMOZD formation rate at the onset of the reaction, as this cyclic compound can be considered as the primary initial thermal degradation product. The power with respect to AMP and CO2 concentration in the kinetic model, and activation energy and pre-exponential factor, were calculated and introduced in this work. AMP degradation to the cyclic DMOZD shows close comparability to monoethanolamine (MEA), where the primary initial product is oxazolidin-2-one (OZD), with less tendency in terms of the reaction frequency. In general, AMP thermal degradation to DMOZD displays a lower reaction rate constant compared to MEA. Considering the reaction rate orders of 0.45 (±0.25) and 1.18 (±0.15) for the CO2 and AMP concentrations in the solution respectively, the DMOZD formation rate displayed more dependency to AMP concentration and less dependency toward CO2.

Original languageEnglish
Pages (from-to)9586-9593
Number of pages8
JournalIndustrial and Engineering Chemistry Research
Volume55
Issue number36
DOIs
StatePublished - Sep 14 2016

Bibliographical note

Publisher Copyright:
© 2016 American Chemical Society.

ASJC Scopus subject areas

  • Chemistry (all)
  • Chemical Engineering (all)
  • Industrial and Manufacturing Engineering

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