EFFECT OF TEMPERATURE ON THERMO PHYSICAL PROPERTIES OF BINARY LIQUID MIXTURE AND ITS EFFECT ON ENVIRONMENT.

Liquid mixtures have attracted considerable attention due to their unusual behaviour. In pharmaceutical, chemical and biochemical industries, organic compounds are used as an intermediate and are normally handled in fluid form and as a consequence, the transport properties of fluids assume importance due to their environmental impact. The emission of volatile or partially volatile compounds must be reduced to appropriate levels before exposing industrial streams to atmosphere. One of the most widespread technologies used to achieve that reduction is adsorption using suitable adsorbent like activated carbon in a fixed bed. These processes are operated at different temperatures. Design of such operations requires quantitative estimates of transport properties of liquid mixtures. In the present study, densities and viscosities of paraanisaldehyde – propylacetate organic mixture was measured over the entire mole fractions at 308.15, 318.15 and 328.15 K. Studies on determination of different thermo physical properties of liquid mixtures within wide range of composition and temperature are valuable sources of information that might be used to examine relation between the internal structure of the system and its physical properties. Excess Gibbs free energy was obtained at different temperature from the measured properties and the spontaneity of the process was discussed. The impacts of organic compound, based on Gibbs free energy values were also discussed. The positive Gibbs free energy revealed that the adsorption is non-spontaneous and hence the impact on the environment of the binary liquid mixtures paraanisaldehyde - propylacetate is high at 308.15, 318.15 and 328.15 K.