Binary system

About: Binary system is a research topic. Over the lifetime, 5788 publications have been published within this topic receiving 97882 citations.

Density, Refractive Index, and Related Properties for 2-Butanone + n -Hexane Binary Mixtures at Various Temperatures

Abstract: Density refractive index n and the related properties molar volume V and molar refraction R have been investigated for 2-butanone + n-hexane liquid binary mixtures over the entire composition range and a wide range of temperatures. Some well-known relationships have been applied to study the temperature and composition dependence of the measured and derived quantities. Furthermore, the deviations of the respective excess properties VE, nE, and RE have been examined, with the aim of identifying particular intermolecular interaction patterns responsible for the macroscopic behavior of these binary mixtures. The results have been interpreted on the basis of structural and geometric effects between the components.

Thermal behaviour of pure and binary Fe(NO3)3·9H2O and (NH4)6Mo7O24·4H2O systems

Abstract: Thermal behaviour of pure ferric nitrate, ammonium molybdate and their mixtures in different ratios were investigated by means of thermal analysis (TG, DTG and DTA) techniques Relative thermal analysis (RTA) graphical treatment of derivatographic curves of the components in the pure and binary system has been carried out as well A series of Fe 2 O 3 –MoO 3 systems were prepared from pure and binary salts by heating at 350, 550, 750 and 1000 °C The X-ray diffraction (XRD) analysis was used to characterize the phases produced from thermal treatment of investigated solids The results revealed that pure ferric nitrate decomposed to Fe 2 O 3 at 250, while pure ammonium molybdate decomposed into MoO 3 and 340 °C and then melted at 790 °C For the binary components, crystalline ferric or molybdenum oxides were detected beside ferric molybdate Fe 2 (MoO 4 ) 3 phase starting from 350 °C Fe 2 (MoO 4 ) 3 phase was formed as a result of solid-solid interactions between the produced oxides The thermal stability of the formed compound was significantly affected by the composition of the mixture and treatment temperature The presence of two-component solids in the binary systems affected the thermal decomposition of their individual salt and affected their physical and chemical behaviour The catalytic activity of the obtained pure and mixed oxides was measured using the decomposition of hydrogen peroxide reaction as a model reaction at 20–50 °C It was found that the mixed oxide solids had catalytic activity higher than single oxides thermally treated at 350 and 550 °C This is attributed to the increase in the concentration of active sites via creation of new ion pairs in case of binary systems The rise in calcination temperature up to 750 and 1000 °C brought about drastic decrease in the activity of all solids because of changing catalyst composition and/or sintering process The activation energies of H 2 O 2 decomposition were determined for pure and mixed solids The results obtained were discussed in light of induced changes in chemical composition and treatment temperature

Vapor Liquid Equilibria of Binary and Ternary Systems with Water, 1,3-Propanediol, and Glycerol

Abstract: Isobaric vapor−liquid equilibrium data for the binary system water + 1,3-propanediol and for the ternary system water + 1,3-propanediol + glycerol were determined at 30 kPa. All the experimental data reported were thermodynamically consistent. The activity coefficients were correlated with the Wilson, NRTL, and UNIQUAC equations. A distillation column was simulated to study the removal of water from a fermentation broth containing 1,3-propanediol and glycerol.