作者:Benjamin G. Harvey、Heather A. Meylemans
DOI:10.1039/c3gc41554f
日期:——
A highly efficient and selective process has been developed for the conversion of 1-hexene to jet and diesel fuels. In combination with commercial processes for the dehydration of ethanol and trimerization of ethylene, this work provides a basis for the synthesis of full-performance hydrocarbon fuels from bio-ethanol. Selective oligomerization of 1-hexene with a Cp2ZrCl2/MAO catalyst at ambient temperature and pressure resulted in 100% conversion of 1-hexene with >80% selectivity to a mixture of the dimer and trimer. The hydrogenated dimer had a −20 °C viscosity of only 3.5 mPa s, an exceptionally low freezing point of −77 °C, and a cetane number of 67 suggesting that it has performance characteristics suitable for both jet and diesel fuels. The hydrogenated trimer had a flash point of 128 °C, a cetane number of 92, a 40 °C viscosity of 3.1 mPa s, and a −20 °C viscosity of 24.5 mPa s. These properties suggest that the trimer has applications as a high-performance diesel fuel. In addition to the fuel-range hydrocarbons, heavier oligomers have potential as biolubricants which improves the carbon yield of useful products to near quantitative levels.
我们开发出了一种将 1-己烯转化为喷气燃料和柴油燃料的高效选择性工艺。结合乙醇脱水和乙烯三聚的商业工艺,这项工作为利用生物乙醇合成高性能碳氢化合物燃料奠定了基础。在常温常压下,使用 Cp2ZrCl2/MAO 催化剂对 1-hexene 进行选择性低聚,可将 1-hexene 100%转化为二聚体和三聚体的混合物,选择性大于 80%。氢化二聚体的 -20 °C 粘度仅为 3.5 mPa s,凝固点特别低,为 -77 °C ,十六烷值为 67,这表明它具有适用于喷气燃料和柴油燃料的性能特点。氢化三聚体的闪点为 128 °C,十六烷值为 92,40 °C 粘度为 3.1 mPa s,-20 °C 粘度为 24.5 mPa s。除了燃料范围内的碳氢化合物外,较重的低聚物还有可能用作生物润滑剂,从而将有用产品的碳产量提高到接近定量水平。