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Abstract
The objective of this paper is to investigate the molecular interaction between corrosion inhibitors and oxygenates molecules through dielectric relaxation studies. It makes one to understand the fuel additives its structure. Fuel additives is a chemical substance, added to fuel ,in concentration typically of less than 1% to impart or enchance needed properties or to overwhelm objectionable properties. They include octane enhancers, antiknock compounds and oxygenates, as well as corrosion inhibitors, detergents, and dyes. It alters the rate at which fuel burns, reduce harmful emissions, prevent premature detonation, stop corrosion, and prevent the formation of deposits in the fuel system and combustion chambers. In view of this, amine and alcohol mixtures most important one. because of amine can be used as a antioxidants,corrosion inhibitors and also be used to control the deposits in engine. Antioxidants are the molecule that inhibits the oxidation of other molecule and used as fuel additives when creating fuel blends. Alcohol can be used as oxygenates. They are used to reduce the carbon monoxide emissions creating when burning fuel.Therefore it is seemed important to examine the molecular interaction studies on those additives. Dielectric relaxation studies are of great help in the assignment of the molecular structure or configurations, particularly those of organic compounds and also helps to detect the formation and composition of complexes in them. The molecular complex formation can be investigated by studying the dielectric relaxation parameter values such as static permittivity (ε0), Permittivity at optical frequency (ε∞), dielectric constant at microwave frequency (ε'),dielectric loss (ε") at microwave frequency, density (r) and the coefficient of viscosity (h) for the system,1-butanol in (benzene + tert.butylamine) and 1-propanol in (benzene + tert.butylamine) taken for the investigation at three different temperatures 303K, 313K and 323K are reported. Using these parameters values of most probable relaxation time (t0), relaxation time corresponding to group rotation (t1) which is otherwise known as intramolecular relaxation time, relaxation time due to overall rotation of the molecule (t2) and distribution of relaxation time (a) are obtained using Higasi model and the values are also reported. The hetero interaction through hydrogen bonding between the molecules of corrosion inhibitors and oxygenates have been identified by the dielectric relaxation process.