Development Of A Micro-emulsified Diesel Containing Alcohol And Its Stability Study

With the development of economy, the dependence of Chinese oil is increasing year by year. The energy issue has become one of the main factors that puzzles the development of economy. In recent years, the ecological environment of Chinese has been destroyed because of the increasing consumption of fossil fuels. The environmental pressures are increasing. Micro-emulsified diesel oil has many advantages, for example saving oil and reducing the emissions of NOX and CO. So Micro-emulsified diesel can alleviate the pressure of energy and environment.In this paper, different surfactants were mixed. The better compound surfactant were screened out by turbiscan. In the diesel oil micro-emulsion, which was prepared by using Span-80, OP-10, Tween-80 as surfactant and several kinds of alcohol with different length of aliphatic chain were used as cosurfactant, the effects of mass ratio of alcohol to surfactant and kinds of alcohol were discussed. The value of HLB was 6.0. The standard free energy change for alcohol to transfer from continuous phase to interfacial membrane was calculated. The linear relationships existed between ?G*o?i and the carbon atom number of alcohol. The results showed that micro-emulsion diesel can be generated spontaneously. Taking into account the cost factor, butyric alcohol was selected as cosurfactant.The effect of the content of surfactant, alcohol and water on the micro emulsified diesel oil were analyzed by experiments and determined the preferred ratio.The density, kinematic viscosity, corrosion and the storage stability of micro-emulsion diesel density were measured. The difference of physical and chemical properties between diesel oil micro-emulsion and pure diesel oil was analyzed. It was found that the diesel oil micro-emulsion had a higher density and kinematic viscosity. The corrosion of micro emulsified diesel oil was analyzed by experiments. The corrosion of micro-emulsion diesel meet the requirements of Chinese. The micro-emulsion diesel optimum ratio:the percentages of Span-80, OP-10, Butyl alcohol, water and diesel oil were 7.059%,1.941%,1.5%,15%,74.5%, respectively.