乙醇－柴油混合燃料的制备及其性能研究

 研究了乳化剂种类、乳化剂含量、乳化剂之间配比及乙醇含量对乙醇－柴油混合燃料性能的影响，优化出乙醇－柴油混合燃料的乳化剂，将其添加于乙醇－柴油中，采用物理共混法制备出最优乙醇－柴油混合燃料。实验得出，阳离子乳化剂31381与非离子乳化剂1202在m(31381) :m(1202)=3:7下复配，制得乙醇－柴油混合燃料的最优乳化剂。在乙醇—柴油（乙醇质量分数为16%）中添加质量分数为3.3%的最优乳化剂，制备出的最优混合燃料在室温下能稳定存放6个月以上；透射电镜测定该混合燃料的粒径分布均匀；燃烧速率与0#柴油相当，而烟度较0#柴油降低60%；腐蚀性符合国家标准。

PREPARATION AND PERFORMANCE STUDY OF ETHANOL-DIESEL BLENDED FUEL

Ethanol-diesel blended fuel was prepared by physical mixing in the presence of emulsifier. The effects of different emulsifiers including their various mixtures, the dosage of emulsifier and the content of ethanol on the performance of blended fuel were investigated. Results showed that under the optimum preparation conditions of a blended fuel with a ethanol content of 16%, using a mixed emulsifier (31381 cation emulsifier and 1202 emulsifier) having a mass mixing ratio of 3 to 7, and a dosage of the mixed emulsifier (HLB=6.95) of 3.3%, the viscosity and the surface tension of the emulsified blended fuel were 3.06 mPa•s and 26.82 mN/m, respectively. The particles distribution of the emulsified blended fuel shown by transmission electron microscopy was uniform. Test results also showed that the combustion rate of said blended fuel was similar with that of 0# diesel fuel, its pitch of smoke reduced by 59.2% as compared with 0# diesel fuel, and its corrosive behavior met the requirement of National Standard. A 6-month storage test at ambient temperature showed that the emulsified blended fuel was stable.