摘要：Magnetic treatment is a method for improving the cold flowability of waxy oils. Previous studies have predominantly focused on the viscosity reduction resulted from the treatment, with the durability of the magnetic effect neglected, which is crucial for pipeline transportation of the treated crude oil. Therefore, this study focuses on the durability and its mechanism of the magnetic effect of a waxy crude oil under static, low shear, and high shear conditions. A viscosity reduction of 15.7% was achieved under the magnetic treatment condition of the magnetic treatment temperature at 52 °C, magnetic field strength at 0.1 T, and a duration of 1 min. However, the magnetic effect gradually diminished with time elapsing and disappeared in 9 h under static conditions. Shear was found to be beneficial to the preservation of the effect, and a correlation between the viscosity of the sheared treated-oil and the energy dissipation of the shear was found. Microscopic observations, impedance measurements, and x-ray diffraction analysis revealed that exposure to a magnetic field might disperse the charged particles, i.e., resins and asphaltenes, in the crude oil, facilitating their adsorption on the wax particle surfaces, thus enhancing electrostatic repulsion among wax particles and resulting in viscosity reduction. The desorption of the adsorbed resins and asphaltenes from the wax particles and reaggregation lead to the gradual diminishment of the viscosity reduction. Shear might inhibit this reaggregation and thus contribute to the durability of the viscosity reduction. ? 2024 Author(s).

ISSN号：1070-6631

卷、期、页：v 36,n 11,

发表日期：2024-11-01

影响因子：0.000000

期刊分区（SCI为中科院分区）：二区

收录情况：EI（工程索引）

发表期刊名称：Physics of Fluids

通讯作者：苏杨,李泉德,梁冰,张超越,康家宝

第一作者：李鸿英,谢意蔚,杨兆铭,苏怀,张劲军

论文类型：期刊论文

论文概要：苏杨,李鸿英,李泉德,谢意蔚,梁冰,张超越,康家宝,杨兆铭,苏怀,张劲军，The durability of viscosity reduction of magnetically treated waxy crude oil，Physics of Fluids，2024，v 36,n 11,

论文题目：The durability of viscosity reduction of magnetically treated waxy crude oil