Excess Properties of and Simultaneous Effects of Important
Parameters on CO2 Solubility in Binary Mixture of Water-Phosphonium
Based-Deep Eutectic Solvents: Response Surface Methodology (RSM) and
Taguchi Method
posted on 2022-01-27, 14:11authored byHosein Ghaedi, Saeed Akbari, Hui Zhou, Wei Wang, Ming Zhao
This study provides useful information
on the existing interactions
in an aqueous solution of deep eutectic solvents (DESs) by studying
excess properties namely excess refractive index and excess logarithm
viscosity at different concentrations and temperatures. In order to
investigate the effects of DES mole fraction and temperature on the
refractive index and viscosity of binary mixtures, the response surface
methodology (RSM) was applied based on the mixed-level full factorial
design. The analysis of variance (ANOVA) results revealed that although
both DES mole fraction and temperature are significant, the DES mole
fraction has more effect on these thermophysical properties. Results
showed that as excess refractive index and excess logarithm viscosity
values are positive over the whole composition range and maximum excess
data were investigated at the water-reach region. Moreover, the effects
of important factors influencing CO2 solubilities such
as pressure, temperature, water content, and molecular weight of DES
were determined using the Taguchi L18 method.
A regression model was developed based on the Taguchi method for prediction
of the prediction of CO2 solubility. The results disclosed
that the pressure is the most significant factor influencing the CO2 fraction followed by the water content and molecular weight
of DESs while the temperature had the lowest effect. The error evaluations
indicated that the Taguchi model is an accurate model and had excellent
performance in prediction of the CO2 solubility.