The enthalpies of dilution of L serine in ethanol water mixtures (with 0.05 increments ranging from 0.05 to 0.40 ethanol by weight) have been measured with LKB 2277 Bio Activity Monitor at 298.15 K.Calculations show t...The enthalpies of dilution of L serine in ethanol water mixtures (with 0.05 increments ranging from 0.05 to 0.40 ethanol by weight) have been measured with LKB 2277 Bio Activity Monitor at 298.15 K.Calculations show that the value of pairwise enthalpic interaction coefficients h2 is negative and minimized at 0.25 ethanol in mixtures.展开更多
Four isothermal sections at 298.15K,308.15K,318.15K and 328.15K in system water-n-hexane-ethanol were measured by gas chromatograph method.The innerscaling method was used to determine the concentrations of n-hexane a...Four isothermal sections at 298.15K,308.15K,318.15K and 328.15K in system water-n-hexane-ethanol were measured by gas chromatograph method.The innerscaling method was used to determine the concentrations of n-hexane and ethanol in this ternary system.Ethy1 acetate was chosen as the sample of inner-scaling because of its separability and fit retainning time.Acetylacetone was chosen as diluent of the oil phase andn-butyl alcohol was chosen as diluent of the water phase.The experimental data of four isothermal sections at 298.15K,308.15K,318.15K adn 328.15K in system water-n-hexane-ethanol at normal pressure were given.Four schematic figures were also given.The character of these phase diagrams was analysed.They were compared with the phase diagram of system water-n-hexane-methanol.The possible causes of experimental error were discussed.The root mean square error of measurement is 1.47%.展开更多
Liquid-liquid equilibrium data were measured for a ethanol-styrene-water ternary system at temperature of 25.00,35.00,40.00 and 50.00?℃ and were correlated with UNIQUAC model.The model parameters were estimated based...Liquid-liquid equilibrium data were measured for a ethanol-styrene-water ternary system at temperature of 25.00,35.00,40.00 and 50.00?℃ and were correlated with UNIQUAC model.The model parameters were estimated based on a mole fraction objective function.The calculated values were in good agreement with the data measured.展开更多
文摘The enthalpies of dilution of L serine in ethanol water mixtures (with 0.05 increments ranging from 0.05 to 0.40 ethanol by weight) have been measured with LKB 2277 Bio Activity Monitor at 298.15 K.Calculations show that the value of pairwise enthalpic interaction coefficients h2 is negative and minimized at 0.25 ethanol in mixtures.
文摘Four isothermal sections at 298.15K,308.15K,318.15K and 328.15K in system water-n-hexane-ethanol were measured by gas chromatograph method.The innerscaling method was used to determine the concentrations of n-hexane and ethanol in this ternary system.Ethy1 acetate was chosen as the sample of inner-scaling because of its separability and fit retainning time.Acetylacetone was chosen as diluent of the oil phase andn-butyl alcohol was chosen as diluent of the water phase.The experimental data of four isothermal sections at 298.15K,308.15K,318.15K adn 328.15K in system water-n-hexane-ethanol at normal pressure were given.Four schematic figures were also given.The character of these phase diagrams was analysed.They were compared with the phase diagram of system water-n-hexane-methanol.The possible causes of experimental error were discussed.The root mean square error of measurement is 1.47%.
文摘Liquid-liquid equilibrium data were measured for a ethanol-styrene-water ternary system at temperature of 25.00,35.00,40.00 and 50.00?℃ and were correlated with UNIQUAC model.The model parameters were estimated based on a mole fraction objective function.The calculated values were in good agreement with the data measured.
