Chemical kinetics of the reaction of carbon dioxide with triethanolamine in non-aqueous solvents

Reaction Kinetics of Carbon Dioxide with Diethanolamine in Polar Organic Solvents

“…The reaction orders were obtained from the slope of the linear relationship in Fig. Sada et al (11) explained that the reaction order would possibly range from first to second, because the deprotonation by DEA may be depressed by a basicity and the steric hindrance effect of DEA The reaction orders were plotted against the dielectric constant of solvent in semilogarithmic scale in Fig. Also, the reaction orders in other references were listed in Table 3.…”

“…In the case of nonaqueous solvents, only the amine is considered as the base in the proton removal step (11). If the steady-state approximation is applied to the zwitterion, one gets a rate of homogeneous reaction as…”

Kinetics of reactive absorption of carbon dioxide with solutions of 1,6-hexamethylenediamine in polar protic solvents

“…Most of the reactive absorptions of CO 2 studies have been conducted in aqueous media except in recent research work by Alvarez-Fuster et al [29] and Sada et al [30]. Alvarez-Fuster et al [29] found that the reaction order with respect to cyclohexylamine in ethanediol to be 1.…”

“…Alvarez-Fuster et al [29] found that the reaction order with respect to cyclohexylamine in ethanediol to be 1. Sada et al [30] studied the heterogeneous kinetics of reactive absorption of CO 2 with mono-and diethanolamine in solvents such as methanol, ethanol, 2-propanol, and water, using a stirred tank absorber with a plane gas-liquid interface at 303 K. The reaction was found to be first order with respect to CO 2 for every solvent. The order of reaction with respect to ethanolamine was found to be 1 only for an aqueous solution of monoethanolamine; for the other solutions, the order ranged from 1.4 to 2, depending on the solvent species.…”

CO2 absorption into N-methyldiethanolamine aqueous-organic solvents

“…However, discrepancies with these conclusions indicated that the suggested mechanism could not be applied to explain the reaction between the CO 2 and MDEA in non-aqueous solutions [43]. In this case, it was considered that the dissolved CO 2 could react with the tertiary solvated alkanolamine, forming an ion pair according to:…”