聚甲氧基甲缩醛的合成及其应用研究进展

来自非石油基的聚甲氧基甲缩醛因具有十六烷值高、与柴油互溶性好、氧含量高等优点,与柴油混配后作为柴油燃料可以提高柴油机热效率,大幅降低污染物排放,是很有发展前景的绿色环保柴油添加组分。本文在介绍聚甲氧基甲缩醛的物理化学性质,及其作为柴油添加剂的性能指标基础上,对其合成技术和反应动力学研究进展进行了总结,对比了不同技术的优缺点,指出离子液体薄膜催化技术是聚甲氧基甲缩醛当前较为适合的产业化路线;并对聚甲氧基甲缩醛柴油的燃烧排放特性,以及其作为新配方燃油组分和新型环保溶剂油等的应用研究进展进行了归纳,最后指出了确定聚甲氧基甲缩醛的合适聚合度值及其添加量,加强车用测试并及时建立相关标准是聚甲氧基甲缩醛作为柴油添加剂后续应用研究工作的要点。

Research progress on synthesis and application of polyoxymethylene dimethyl ethers

Polyoxymethylene dimethyl ethers(PODE) made from non-petroleum-based substitude fuel is a new kind of green and environment-friendly diesel fuel additive,which has excellent performance and great application potential because of its high cetane number,high oxygen content and non-intermiscibility gap between diesel. It can improve the diesel fuel's cetane number and combustibility while reduce the emissions of pollutant. This work presents an overview of PODE. First,the physico-chemical characteristics and some performance indexes for diesel fuel of PODE_n has been described in detail. Then the recent research progress of synthesis technology and mechanism of chain propagation for synthesis reaction was also summarized. Using ionic liquid thin film catalysis as the possible industrialization route for PODE was proposed. The research progress of PODE_n as diesel addictive and its new applications of being new component in fuel and new type of green solvent oil was also presented. Finally the trend and key tasks of future research work was pointed out. The proper degree of polymerization and addictive amount of PODE should be determined,and the combustion and power performance of diesel fuel blended with PODE should be checked by lots of experiments. The production standard should be also established.