Effects of waxes on hydrate behaviors in water-in-oil emulsions containing asphaltenes

被引：44

作者：

Zhang, Dongxu ^{[1
]}

Huang, Qiyu ^{[1
]}

Li, Rongbin ^{[1
]}

Wang, Wei ^{[2
]}

Zhu, Xiangrui ^{[1
]}

Li, Huiyuan ^{[3
]}

Wang, Yijie ^{[1
]}

机构：

[1] China Univ Petr, CNPC, Beijing Key Lab Urban Oil & Gas Distribut Technol, Surface Engn Pilot Test Ctr, Beijing 102249, Peoples R China

[2] SINOPEC Dalian Res Inst Petr & Petrochem, Dalian 116000, Peoples R China

[3] CNPC Res Inst Safety Environm Technol, Beijing 102206, Peoples R China

来源：

CHEMICAL ENGINEERING SCIENCE | 2021年 / 244卷

基金：

中国国家自然科学基金;

关键词：

Hydrate formation; Hydrate dissociation; Water-in-oil emulsion; Asphaltenes; Waxes; HYDROCARBON EMULSIONS; INTRINSIC KINETICS; SHELL-MODEL; GAS; DISSOCIATION; DEPOSITION; MASS; GROWTH; AGGLOMERATION; EQUILIBRIUM;

D O I：

10.1016/j.ces.2021.116831

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

In this study, the effects of waxes on carbon dioxide hydrate formation and dissociation in asphaltenecontaining emulsions were systematically investigated using a high-pressure stirred autoclave equipped with an on-line viscometer. The results showed that the presence of waxes strengthened the inhibiting effect of asphaltenes on hydrate formation. Specifically, the induction time increased and the amount of formed hydrates decreased with increasing wax content in water-in-oil emulsion containing asphaltenes. The results indicated that waxes increased the viscosity of emulsions. It was observed that wax crystals dispersed in the bulk phase and got adsorbed at water-oil interface through the synergistic effect with asphaltenes. Furthermore, waxes inhibited the dissociation of hydrates in these emulsions. Both the gas emission rate and the average rate of hydrate dissociation decreased with an increase in wax content. The possible mechanisms were proposed to illustrate the effects of waxes on hydrate formation and dissociation in asphaltene-containing water-in-oil emulsions. (C)2021 Elsevier Ltd. All rights reserved.

引用

页数：14

共 65 条

[1] Molecular weight of petroleum asphaltenes: A comparison between mass spectrometry and vapor pressure osmometry [J].