Dissipative particle dynamics simulation of the stability of heavy oil

被引：0

作者：

Guan D. ^{[1
]}

Zhang L. ^{[1
]}

Zhao S. ^{[1
]}

Xu C. ^{[1
]}

机构：

[1] State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing

来源：

Huagong Xuebao/CIESC Journal | 2022年 / 73卷 / 10期

关键词：

dissipative particle dynamics; mesoscale; molecular simulation; petroleum; stability of heavy oil;

D O I：

10.11949/0438-1157.20220768

中图分类号：

学科分类号：

摘要：

The stability of heavy oil is related to the safety of its exploitation, storage, transportation, and processing. An accurate method for determining the stability of heavy oil has important guiding significance for the production and processing of heavy oil. However, the empirical method for determining the stability of heavy oil has certain limitations. Establishing the judgment method of heavy oil stability from the mechanism will improve the prediction accuracy of heavy oil stability. In this paper, the aggregation states of molecules in different heavy oil systems are simulated based on dissipative particle dynamics (DPD). The simulation results show that the asphaltene aggregation rate of the heavy oil system is consistent with the judgment results of the colloidal instability index (C. I. I.) and stability judgment diagram, which verifies the accuracy of the simulation. Based on the simulation results, this paper discusses the limitations of C.I.I. and stability judgment diagram and puts forward an improved stability judgment diagram for rapid judgment of heavy oil stability. The determination method of heavy oil stability proposed in this paper is expected to be used in practical industrial processes. © 2022 Chemical Industry Press. All rights reserved.

引用

页码：4613 / 4624

页数：11

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