Experimental and Predicted Vapor–Liquid Equilibrium for Diisopropanolamine with m-Cresol and 2,6-Dimethylphenol at 20.0 kPa

Abstract

Measurements of isobaric vapor−liquid equilibrium (VLE) results for binary systems of m-cresol (MC) + diisopropanolamine (DIPA) and 2,6-dimethylphenol (DMP) + DIPA and the ternary system of MC + DMP + DIPA were conducted at the pressure of 20.0 kPa. The binary VLE experimental data showed that DIPA had stronger interaction with MC than DMP. The ternary system experimental VLE data showed that DIPA could improve the relative volatility of DMP to MC. The binary experimental data were checked by using Herington area and point test methods, and the checked results were thermodynamically consistent. Meanwhile, the VLE data were correlated by Wilson, nonrandom two-liquid, and universal quasichemical models, and the binary energy interaction parameters for these models were obtained. These activity coefficient models were used to predict the ternary system VLE data. The predictive results suggested that the Wilson model had the best prediction.

Measurement and Correlation of Isobaric Vapor–Liquid Equilibrium for Camphene, (+)-3-Carene, and (±)-Limonene Systems

“…The comparison between the experimental data and the regression results of the models are shown in Figures 5−7 The experimental relative volatilities of camphene + (±)-limonene, camphene + (+)-3-carene, and (±)-limonene + (+)-3-carene system are compared with results calculated 28,53 using model parameters in Table 8, plotted in Figures 8, 9, and 10, which clearly demonstrate that the relative standard uncertainty of the model for the relative volatility of these systems are better than 0.05, 0.02, and 0.02, respectively. This demonstrates that the experimental data are in agreement with calculated results.…”

Isobaric Vapor–Liquid Equilibria of Binary Systems Containing Cyclohexane for the Separation of Phenolic Compounds from Biomass Fast Pyrolysis Oils

“…Some vapor–liquid equilibrium (VLE) systems for separation processes of phenolic compounds from pyrolysis oil have been investigated. The binary systems [including MC + o -cresol (OC)/diisopropanolamine (DIPA) and 2, 6-dimethylphenol (2, 6-DMP) + OC/MC/DIPA] and ternary systems (MC + 2, 6-DMP + DIPA) were measured and calculated at 20.0 kPa in Leng et al’s work. , The Wilson and NRTL activity coefficient models were adopted to correlate the VLE data, and the regressed data fitted well with the experimental data. Xia et al studied the VLE experiment and calculation of binary systems (butyl acetate + anisole/guaiacol) at 101.33 kPa .…”