北京市燃油标准变化对车用汽油主要性能的影响

Effect of Beijing Fuel Standard Change on Main Performance of Motor Gasoline

为改善大气环境,减少汽车尾气中有害物质排放,我国车用汽油持续加速进行质量升级。基于北京市汽油标准变化对车用汽油性能的影响,以2018—2022年北京市车用汽油为研究对象,对车用汽油馏程、驱动性指数、硫含量、苯含量、芳烃含量、烯烃含量和辛烷值等重要指标进行分析。研究发现,与京Ⅵ汽油相比,京ⅥB汽油50%蒸发温度和终馏点平均值均降低,汽油馏程分布范围更轻质化,可有效提高发动机加速的灵敏性;京ⅥB汽油芳烃和烯烃含量平均值均降低,汽油的清洁化性能得到提高。

In order to improve the atmospheric environment and reduce the emission of harmful substances in automobile exhaust,the quality upgrade of automobile gasoline in China has been accelerating.Based on the influence of the standard on the performance of motor gasoline,taking Beijing motor gasoline from 2018 to 2022 as the research object,this paper analyzed and compared the main indexes of motor gasoline,such as distillation range,driving index(DI),sulfur content,benzene content,aromatic content,olefin content and octane number.The results show that compared with Beijing Ⅵ gasoline,Beijing ⅥB gasoline reduces 50%evaporation temperature and final distillation point,and the content of light hydrocarbon in gasoline fraction is higher,which will effectively improve the sensitivity of engine acceleration.The average content of aromatic hydrocarbon and olefin in Beijing VIB gasoline decreased,which improved the cleanliness of gasoline.