Effect of a Magnetic Nanocomposite Pour Point Depressant on the Structural Properties of Daqing Waxy Crude Oil

作者：Hailin Yu, Zhengnan Sun, Guolin Jing, Zhiwei Zhen, Yang Liu, Kai Guo · 发表于：Energy & Fuels · 年份：2019 · DOI：10.1021/acs.energyfuels.9b00689 · 被引用次数：45 · 研究领域：Petroleum Processing and Analysis、Enhanced Oil Recovery Techniques、Rheology and Fluid Dynamics Studies

Nanocomposite pour point depressants (PPDs) provide a new way to further improve the fluidity of waxy crude oil at low temperatures, which has important application values in pipeline transportation. In this work, the effect of ethylene-vinyl acetate (EVA) doped with magnetic spherical nanoparticles of Fe 3 O 4 (30 nm) on the morphology of wax crystals and the flow behavior of Daqing crude oil was investigated by polarized optical microscopy and rheological testing. The results showed that, compared to the EVA PPD doped with spherical nano-SiO 2 (with the same size), the EVA (VA = 28%)/Fe 3 O 4 nanocomposite PPD caused Daqing crude oil to have a more compact and regular wax crystal structure and a weaker gel structure because of the synergistic effect of magnetic materials and heterogeneous nucleation. This study examines the mechanism of nanocomposite PPDs and provides a new perspective for the development of new nanohybrid PPDs.