Abstract: According to micro-emulsification theories, Span80+Tween80+ oleic acid was chosen as the surfactant to prepare methanol-diesel micro- emulsified fuel with many kinds of concentrations ratio. The effects of different mixture ratio of surfactant, amount of methanol, different HLB and different additive on stability of micro-emulsion diesel oil were investigated in more details．As a result, the optimum conditions were found as follows: the value of m(Span80) ∶m（Tween80）∶m(oleic acid) 3∶3∶6, the amount of the surfactant 4％(wt), the additive n-butyl alcohol and the ratio of methanol and fuel oil 1∶8.

Key words: Fuel oil, Non-ionic surfactant, Methanol

摘要： 根据微乳化理论选择Span80+Tween80+油酸作为表面活性剂配制了多种配比的甲醇-柴油微乳化燃油，并讨论表面活性剂加入量、甲醇的加入量、不同的HLB值、以及助剂的种类对微乳柴油稳定性的影响。结果表明最佳的实验条件为：表面活性剂复配比为m(Span80)/m（Tween80）/m(油酸)=3∶3∶6，其最佳加入量为4％（质量分数），助剂为正丁醇，甲醇与燃料油的物质的量比为1∶8。

关键词: 燃料油, 非离子表面活性剂, 甲醇