Research On Diesel Anti-wear Agents

With the continuous enhancements of the standards of automobile exhaust emission bycountries and the air quality requirements by people, governments and the automotiveindustry have put forward higher requirements on the quality of diesel. To this end, the majordomestic and foreign refineries are concentrated on reducing the sulfur content in diesel byusing new technologies. However, the diesel with low sulfide causes a series of problems forexample poor lubricity. Therefore, developing the excellent anti-wear agent is of importanceto the hydro-cracking diesel.In the paper, dimer acid and oleic alcohol amide were made by soybean oil, peanut oil,corn oil, and oleic acid and, anti-wear performance and optimum dosage of these additivewere additives were determined by examining the abrasion resistance of dimerized vegetableoil fatty acids and the mutual influence between dimerized vegetable oil fatty acids. Theexperimental results show that the decrease of wear scar diameter is fastest when theconcentration of dimer acid and oleic alcohol amide in the range of0～200μg g-1and all ofthese additives have the optimal amount of dosage. With the increase in the amount of thedimer acid prepared from corn oil, the decrease of wear scar diameter is relatively slow. Therelationship of wear scar diameter is also investigated with100μg g-1and200μg g-1ofadditives. The results indicate that the dimer acid prepared by corn oil show obvioussynergistic effect when used as anti-wear agent and other additives show inhibitory effect.The interaction between the antistatic agents and anti-wear agents and the effect of dieselviscosity were also investigated respectively. The experimental results show that the anti-wearhas a synergistic effect for antistatic agent and improve the conductivity of the antistatic agent.The anti-wear agents and antistatic agents do not have much impact on hydro-cracking dieselviscosity.