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Study on Rheological Characteristics and Molecular Interaction Properties of Annona Squamosa (Custard Apple) Seed Biodiesel

The consequential use of biodiesel as a source of renewable energy sustained a rapid growth over the past few years due to its major advantages like biodegradability, higher lubricity, low toxicity and low CO2 emissions. Generally, transesterification is used for the production of biodiesel by employing base catalysis. Here, this Biodiesel is prepared from Annona Squamosa (Custard apple) seed oil with methanol by using potassium hydroxide as a catalyst which is further tested in Compression Ignition (C.I) engines. In the present study, an attempt has been made to analyze the acoustical studies on various blend compositions of Biodiesel with conventional diesel in the ratios 0%, 20%, 40%, 60%, 80% and 100% by determining relative viscosity, ultrasonic velocity and density at 303K. From these experimental data, various molecular interaction parameters like adiabatic compressibility, viscous relaxation time, inter molecular free length, specific acoustical impedance are calculated and the results are discussed in the light of solute-solvent interaction.