Analysis of the viscosity reduction of crude oil with nano-Ni catalyst by acoustic cavitation
Analysis of the viscosity reduction of crude oil with nano-Ni catalyst by acoustic cavitation
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DOI：
10.1016/j.fuel.2020.117976
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发表时间：
2020-09-01
期刊：
影响因子：
7.4
通讯作者：
Peng, Jian
中科院分区：
文献类型：
--
作者：
Cui, Jingjing;Zhang, Zhihong;Peng, Jian
探讨了超声波与多相催化剂协同作用对原油降粘的影响。从沥青质的结构变化分析了可能的降粘原因。本文提出了一种基于FTIR光谱和XRD图谱分析沥青质团簇结构的系统和统一的方法。结果表明，金属镍颗粒的加入可以增强空化效应。空化效应破坏了胶质、沥青质和蜡晶形成的空间网络结构，使处理后的油样粘度趋于稳定。随着对空化具有协同效应的金属镍颗粒的加入，沥青质分子经历裂化反应并分解成小分子烃化合物，有助于降低粘度。但当添加一定量的金属镍颗粒时，表面空化的程度导致空化气泡数量增加，自由基复合，芳烃聚合形成次生沥青质。这导致粘度略微上升。
The present study discusses ultrasound wave and heterogeneous catalysts act synergistically on viscosity reduction of crude oil. The reasons for the possible viscosity reduction were analyzed from the structural changes of asphaltene. This paper presents a systematic and unified approach to analyzing asphaltene clusters structure based on FTIR spectra and XRD patterns. The results reveal that the cavitation effect can be intensified by the addition of metallic nickel particles. The cavitation effect destroys the spatial network structure formed by resin, asphaltene and wax crystals, so that the viscosity of the treated oil sample tends to be stable. With the addition of metallic nickel particles which has a synergistic effect on cavitation, the asphaltene molecules have undergone a cracking reaction and decomposed into small molecular hydrocarbon compounds, contributing to viscosity reduction. However, when added a certain amount of metallic nickel particles, the degree of surface cavitation leads to increasing number of cavitation bubbles, free radicals recombination, and aromatic hydrocarbons polymerizing to form secondary asphaltenes. This leads to a slight rise in viscosity.