Effect of nanocomposite as pour point depressant on the cold flow properties and crystallization behavior of diesel fuel
Effect of nanocomposite as pour point depressant on the cold flow properties and crystallization behavior of diesel fuel
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DOI：
10.1016/j.cclet.2021.09.021
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发表时间：
2021-09
影响因子：
9.1
通讯作者：
Yuan Xue;Fengfei Chen;Bin Sun;Hua-lin Lin;B. Dai;Sheng Han
中科院分区：
文献类型：
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作者：
Yuan Xue;Fengfei Chen;Bin Sun;Hua-lin Lin;B. Dai;Sheng Han
高效纳米复合降凝剂（PPD）在改善柴油低温流动性方面的潜在应用引起了广泛关注。本文采用熔融共混法制备了三种不同烷基链长（即，十四烷基、十六烷基和十三烷基）的甲基丙烯酸正烷基酯-马来酸酐共聚物（R1 MC-MA，R1= C14、C16、C18）和SiO2纳米颗粒。研究了这些纳米杂化PPD对柴油冷滤点和凝点的降低效果。结果表明，纳米杂化PPD在柴油上表现出更好的性能。C14 MC-MA/SiO2纳米杂化PPD处理柴油时，CFPP和SP的降低率分别达到6 °C和18 °C，均高于单一C14 MC-MA处理柴油时的降低率。通过粘度-温度曲线和偏光显微镜分析，探讨了C14 MC-MA/SiO2纳米杂化降凝剂的作用机理，结果表明，C14 MC-MA/SiO2纳米杂化降凝剂能有效降低柴油的低温粘度，改善柴油的结晶行为和结晶形态。因此，柴油的冷流性能得到了显着改善。
The high effective nano-hybrid pour point depressant (PPD) has attracted extensive attention for its potential application in improving the cold flow properties of diesel fuel. In this paper, the nano-hybrid PPD was prepared by melt-blending method using three different alkyl chain lengths (i.e., tetradecyl, hexadecyl, and octodecyl) ofn-alkyl methacrylate-maleic anhydride copolymers (R1MC-MA, R1= C14, C16, C18) and SiO2nanoparticles. The effect of those nano-hybrid PPDs on the cold filter plugging point (CFPP) and solidifying point (SP) depressing of diesel fuel were studied. Results indicated that nano-hybrid PPD showed much better performance on diesel fuel. The diesel fuel treated with 0.2 wt% C14MC-MA/SiO2nano-hybrid PPD exhibited the best depression in CFPP and SP by 6 °C and 18 °C, respectively, which higher than that of single C14MC-MA. Viscosity-temperature curves and polarized optical microscopy were conducted to explore the performance mechanism; and results presented that nano-hybrid PPD of C14MC-MA/SiO2could effectively lower the low-temperature viscosity, and modify the crystallization behavior and crystal morphology of diesel. Therefore, the cold flow properties of diesel were significantly improved.