倾点
蜡
差示扫描量热法
粘弹性
材料科学
抑制剂
流变学
粘度
兴奋剂
化学工程
化学
色谱法
复合材料
热力学
有机化学
医学
物理
光电子学
药理学
工程类
作者
Cunzhe He,Yanfen Ding,Juan Chen,Feng Wang,Chong Gao,Shimin Zhang,Mingshu Yang
出处
期刊:Fuel
[Elsevier]
日期:2016-03-01
卷期号:167: 40-48
被引量:99
标识
DOI:10.1016/j.fuel.2015.11.031
摘要
The influence of the nano-hybrid pour point depressant (NPPD) on flow properties of waxy crude oil was studied. Rheological results showed that NPPD demonstrated better improvement in viscosity, yield stress and pour point reduction for crude oil than the conventional polymer PPD (N6) did. Moreover, the viscoelastic behavior data showed that the NPPD doped oil had a weaker gel network structure at a low temperature compared with N6 doped oil. Differential scanning calorimetry results revealed that NPPD reduced the wax appearance temperature (WAT) and the wax precipitation amount within the temperature range from WAT to −20 °C. The difference of shape and size of wax crystals in undoped and doped oils was studied by X-ray diffraction and polarized optical microscopy. The total interaction energy between wax particles was calculated according to the Derjaguin–Landau–Verwey–Overbeek theory using ζ potential. It was found that the energy barrier between the wax particles in the NPPD doped oil was higher than that in N6 doped oil. The larger electrostatic repulsion inhibited the aggregation of the wax particles and stabilized the NPPD doped oil system.
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