清洁燃料F-T柴油在柴油机中应用的研究

煤和含碳资源通过F—T合成可以获得十六烷值高、硫和芳香烃含量极低的F—T柴油。综述了F—T柴油的特性及其对排放的影响，并就F—T柴油和常规柴油在柴油机中的燃烧和排放特性进行了比较。与常规柴油相比：F-T柴油的滞燃期缩短了约14％～30％，预混燃烧放热峰值较低，最高燃烧压力略低，法规排放和非法规有毒排放都得到了大幅度降低，其中NOx和PM分别平均降低了13％和26％。因此，F-T柴油是一种优秀的清洁代用燃料。最后指出了F—T柴油在发动机中应用时在润滑性能、低温性能和与浸油弹性体兼容性等方面存在的问题，并探讨了解决途径。

Study and Development of Fischer-Tropsch (F-T) Diesel Fuel as a Clean Alternative Fuel for Diesel Engines

Through Fischer-Tropsch(F-T) processes,coal and carbon-bearing feedstocks can be converted to F-T diesel fuel that has high cetane number,very low sulfur and aromatic contents.This review described typical F-T diesel fuel properties,discussed how these fuel properties impact pollutant emissions,and made a comparison related combustion and emission characteristics between F-T diesel fuel and conventional diesel fuels in diesel engines.In comparison with conventional diesel fuels,F-T diesel fuel exhibits an approximately 14%~30% shorter ignition delay,displays a lower maximum premixed burn rate,and has a lower peak in-cylinder pressures.The regulated emissions and unregulated toxic emissions are reduced with F-T diesel fuel.Average NO_x reductions are 13% and average PM reductions are 26% compared to conventional diesel fuels.Therefore F-T fuel is an excellent clean alternative fuel for diesel engines.Finally,possibly negative performance attributes of F-T fuel,such as lubricity,low temperature flow properties and elastomer compatibility,were discussed.