乙醇柴油性能研究

STUDY ON THE PERFORMANCE OF ETHANOL DIESEL FUEL

以常二柴油、常三柴油、催化裂化柴油、催化加氢柴油和0号轻柴油为基础油,分别配制了不同体积分数的乙醇柴油,对乙醇柴油的互溶性、理化性能和发动机性能进行了研究。结果表明,商品柴油与乙醇的互溶性能及稳定性能良好;水分会严重影响乙醇柴油的稳定性;助溶剂可以适当改善乙醇柴油的容水性;加入乙醇后,能不同程度地降低乙醇柴油的凝点和冷滤点;乙醇柴油的腐蚀试验结果能够达到国家燃油标准;乙醇的加入使得柴油的密封性能变差,闪点降低,从而增加了柴油的着火危险性;乙醇柴油的燃料消耗率和排气烟度与商品柴油相当,但NOx排放降低。

Ethanol diesel fuel samples with various ethanol blended ratios were prepared using distillates of 2nd and 3rd atmospheric column side cuts, catalytic cracking diesel fraction,hydrotreated diesel fraction and commercial 0# diesel fuel as base oil respectively.The mutual solubility of ethanol and diesel,physical and chemical properties, longtime stability and engine test performance were investigated. Results showed that the mutual solubility and stability of ethanol and 0# diesel fuel were excellent ; the existence of water could significantly affect the stability of ethanol diesel ; adding co- solvent could improve the water tolerance of ethanol diesel in some extent. The low temperature performance of diesel fuel was improved a little by adding ethanol. The copper strip corrosion test result of ethanol diesel could meet the requirement of National Standard for diesel fuel, yet its flash point and seal compatibility were dropped a bit. As compared with diesel fuel,the fuel consumption and smoke exhaust of ethanol diesel were similar to those of conventional diesel and its NOx exhaust was lower.