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Reducing carbon emissions has emerged as a critical challenge, and among various methods, solvent-based CO2 capture technology is the most widely employed. Amines, particularly effective solvents for CO2 capture, play a significant role in this process. To advance this technology, it is essential to understand the thermodynamic properties of the interactions between the constituent components. In this study, we examined the deviation in dynamic viscosity ( Δ η ), and the deviation in refractive index ( Δ n D ) calculated from the measured η and n D data for n-butylamine (NBA) with alkanol systems. The temperature range for our study was 298.15–318.15 K. We utilized the Ab-initio approach for Δ η data analysis. Our findings revealed that the depolymerization power of alkanol is dependent on the unlike interactions. Furthermore, we employed various correlations/mixing rules to predict the η as well as n D values from the experimental pure components data. The standard deviation was utilized to express the predictive abilities of these correlations. [ABSTRACT FROM AUTHOR]

As butanol would be the potential oxygenates, viscosity of twelve binary systems of butanol isomers with hydrocarbons (cyclohexane or benzene or toluene) was measured with Ubbelohde viscometer over the entire range of composition at 308.15 K. The calculated viscosity deviation values were fitted to Redlich-Kister polynomial. The deviations in viscosity were coupled with previously reported excess molar volume data in order to study the intermolecular interaction in these binary mixtures with one associated component. This approach was proposed for the viscosity of binary mixtures with self-associating component and here applied on butanol + cyclohexane or benzene or toluene mixtures at 308.15 K. It was suggested that depolymerization power of aromatic hydrocarbon toward isomers of butanol as well as strength of intermolecular interactions (electron donor-acceptor type) between monomer of butanol and aromatics depends on π-electron density of aromatic hydrocarbon. The viscosity of these binary mixtures was also correlated by Grunberg-Nissan, Tamura-Kurata, Hind-McLaughlin-Ubbelohde and Katti-Chaudhari correlations. It was found that the viscosity of these binary mixtures was best predicted by Grunberg-Nissan correlation except for n-butanol + cyclohexane or toluene and tert-butanol + benzene mixtures. [ABSTRACT FROM AUTHOR]