1 research outputs found
Separation Performance of BioRenewable Deep Eutectic Solvents
Deep eutectic solvents
(DESs) have been regarded as promising cost-effective
and environmentally benign alternatives to conventional volatile organic
solvents. The screening and selection of the suitable solvent for
separation is an important part of the process design. Limiting activity
coefficients provide a useful tool for the optimal choice of the selective
solvent. For the first time, activity coefficients at infinite dilution
have been measured in DESs as a solvent for 23 solutes (aliphatic
and aromatic hydrocarbons, alcohols, ketones, ethers, and esters).
The DESs were constituted from choline chloride and glycerol in molar
ratios of 1:1 and 1:2. The measurements were carried out with the
help of gas–liquid chromatography in the temperature range
298–358 K. Using experimental results, selectivity of different
separation cases was assessed. To verify the separation performance
of DESs the perturbed-chain statistical associating fluid theory (PC-SAFT)
was employed for the first time. This method appears to be powerful
tool for screening of suitable precursors and evaluation of separation
performance at temperatures relevant for practical applications. It
has turned out that the separation performances of DESs are comparable
to those of ionic liquids, but DESs are cheaper, because they are
constituted from natural and renewable nontoxic bioresources