Showing papers by "Marta Królikowska published in 2021"
TL;DR: In this article, the infinite dilution capacity and selectivity of the studied ionic liquids were evaluated to evaluate the effectiveness of using it as an extractant in the separation of aliphatic from aromatic hydrocarbons and sulfur compounds from alkanes.
12 citations
TL;DR: In this paper, a variety of machine learning algorithms are applied, including: partial least squares regression, stepwise multiple linear regression, and a number of common classifiers (k-nearest neighbors, naive Bayes, linear discriminant analysis, support vector machines).
10 citations
TL;DR: In this paper, the isothermal VLE was measured by an ebulliometric method within a temperature range from T ǫ(328.15 to 348.15) K with an increment of 10 K and pressures up to 90 kPa.
10 citations
8 citations
TL;DR: In this paper, the influence of ionic liquid based additives on thermodynamic and physicochemical properties of aqueous lithium bromide solutions has been investigated in the context of the absorption refrigeration system.
Abstract: In recent years, many compounds have been proposed as additives to conventional working fluids to improve the performance of the absorption refrigeration system The main aim of this research is to show the influence of ionic liquid based additives on thermodynamic and physicochemical properties of {LiBr + water} solutions The following additives: 3-(1-methyl-morpholinium)propane-1-sulfonate, N,N-di(2-hydroxyethyl)-N,N-dimethylammonium bromide, and N,N,N-tri(2-hydroxy-ethyl)-N-methylammonium bromide have been added to aqueous lithium bromide solutions (IL to LiBr mass fraction, w2 = 03) The physicochemical and thermodynamic properties of {LiBr (1) + additive (2) + water (3)} and {LiBr + water} systems including (vapor + liquid) phase equilibria (VLE), density (ρ) and dynamic viscosity (η) were determined over wide temperature and composition ranges The conductor-like screening model for real solvents (COSMO-RS) was used for the VLE data prediction For the density and dynamic viscosity correlations, empirical equations were applied A comparison of experimental data for {LiBr + additive + water} with those for {LiBr + water} systems shows the influence of using the additives proposed in this work The data presented are complementary to the current state of knowledge in this area and provide directions for future research
7 citations
TL;DR: In this paper, the influence of three lithium salts on solubility is presented, and the effect of the additive on physicochemical and thermodynamic properties is characterized and the possibility of the potential application of such new ternary systems in absorption refrigeration technology is determined.
4 citations
TL;DR: In this paper, new experimental data on thermodynamic properties of ionic liquid (IL) aqueous solutions are presented, including the (vapor + liquid) phase equilibria, liquid density, and dynamic viscosity.
Abstract: In this work, new experimental data on thermodynamic properties of ionic liquid (IL) aqueous solutions are presented. The (vapor + liquid) phase equilibria, liquid density, and dynamic viscosity of...
3 citations
TL;DR: In this paper, the physicochemical and thermal properties of single base granules were studied using differential scanning calorimetry (DSC), which served to determine phase diagrams for two-component mixtures.
Abstract: Examinations of two-component mixtures, namely: triphenylamine + centralite I (TPA + CI) and triphenylamine + akardite II (TPA + AkaII) were carried out using differential scanning calorimetry (DSC), which served to determine phase diagrams. Experimental data were described with NRTL model and eutectic points for both systems were determined. For TPA + CI system, they were equal to xEu,TPA = 0.2899, TEu = 62.9 °C, whereas for TPA + AkaII system they amounted to xEu,TPA = 0.7868, TEu = 117.5 °C. Granules contain mixtures of eutectic composition were obtained. The physicochemical and thermal properties of resultant single base granules were studied. The helium density of both granules was approx. 1.47 g cm−3, the average dynamic force amounted to 0.55–0.60 bar−1 s−1, and the calorific value ranged from 3060 to 3095 J g−1. Both granules should be chemically stable for 10 years of storage at 25 °C; they meet the requirements of STANAG 4582 standard. DSC analysis of decomposition processes was used to determine kinetic parameters and to adjust the chemical reaction model of nth order with autocatalysis (CnB). Reaction order ranged from 2.6 to 3.0, while the activation energy was similar (197–198 kJ mol−1). Based on examination of thermal properties, it was observed that both eutectic mixtures of stabilizers prevent the decomposition reaction more efficiently than the use of individual compounds as stabilizers.