摘要
聚甲氧基二甲醚(DMMn)具有氧含量和十六烷值高的优点,将其与柴油混配可有效提高柴油的燃烧性能,降低尾气中污染物的排放。因聚合度为5~8的DMMn常温下为固态,不易与柴油互溶,影响柴油低温流动性,所以选择聚合度为1~4的DMMn与0#柴油进行调和。通过将单组分DMM1~DMM4和DMM1~4混合组分分别按照7个不同的质量比与0#柴油调和,并考察对柴油凝点、密度、运动黏度及动力黏度的影响。结果表明:单组分DMM1~DMM4和DMM1~4混合组分调和柴油后均可以显著降低柴油的凝点,21%的DMM1调和0#柴油时降凝效果最好为降低6℃。根据调和柴油性质对比0#柴油国Ⅵ标准,使密度和黏度保持在标准范围内,得到最优降凝的调和比例为9%DMM1、12%DMM2和18%DMM1~4,最后通过对最优降凝调和柴油进行十六烷值和闪点以及红外光谱和质谱检测,确定18%的混合DMM1~4为最优配比,为实际柴油调和提供参考。
Polymethoxy dimethyl ether(DMMn) has the advantages of high oxygen content and high cetane number. Mixing it with diesel can effectively improve the combustion performance of diesel and reduce the emission of pollutants in exhaust gas. DMMn with a polymerization degree of 5-8 is solid at room temperature, and is not easily miscible with diesel, which affects the low-temperature fluidity of diesel. Therefore, DMMn with a polymerization degree of 1-4 is selected to be blended with 0# diesel. The single component DMM1-DMM4 and DMM1-4 mixed components were mixed with 0# diesel oil according to 7 different mass ratios, and the effects on diesel gel point, density, kinematic viscosity and dynamic viscosity were investigated. The results showed that the single component DMM1-DMM4 and DMM1-4 mixed components could significantly reduce the freezing point of diesel after blending with diesel. The best effect was to reduce 6℃ when the 21% DMM1 was blended with 0# diesel. According to the characteristics of blending diesel oil, the density and viscosity of the 0#diesel were kept within the national standard range for diesel(Ⅵ), and the optimal condensation for depressing the freezing point was9% DMM1, 12% DMM2 and 18% DMM1-4 respectively. Finally, the optimum condensation of 18% mixed DMM1-4 was determined by the cetane number, flash point and the infrared spectrum and mass spectrometry detection, which provided a reference for the actual diesel blending.
作者
李燊
袁梦
张志美
乔英云
田原宇
LI Shen;YUAN Meng;ZHANG Zhimei;QIAO Yingyun;TIAN Yuanyu(Laboratory of Low Carbon Energy and Chemical Engineering,College of Chemical and Environmental Engineering,Shandong University of Science and Technology,Qingdao 266590,Shandong,China;State Key Laboratory of Heavy Oil Processing,China University of Petroleum(East China),Qingdao 66580,Shandong,China)
出处
《化工进展》
EI
CAS
CSCD
北大核心
2020年第3期947-955,共9页
Chemical Industry and Engineering Progress
基金
国家自然科学基金(21576293,21576294,21878335)
自主创新科研计划(15CX05044A)。
关键词
混合物
聚合物
优化
聚甲氧基二甲醚
柴油调和组分
凝点
密度
黏度
mixtures
polymers
optimization
polymethoxy dimethyl ether
diesel blending component
condensation point
density
viscosity
作者简介
第一作者:李燊(1993-),男,硕士研究生,研究方向为煤化工。E-mail:2931434655@qq.com;通信作者:田原宇,教授,博士生导师,主要研究方向为低碳能源化工工艺与设备一体化。E-mail:tianyy1008@126.com。
