检索结果-南通市图书馆

Role of the porphyrins and demulsifiers in the aggregation process of asphaltenes at water/oil interfaces under desalting conditions:a molecular dynamics study

引用

Petroleum Science 2020年第3期17卷 797-810页

作者： H.Santos Silva A.Alfarra G.Vallverdu D.Bégué B.Bouyssiere I.Baraille Institut des Science Analytiques et Physico-Chimie pour l’Environnement et les Materiaux UMR 5254CNRS/Univ Pau&Pays Adour64000 PauFrance Total Research and Technology GonfrevilleBP 2776700 HarfleurFrance Joint Laboratory C2MC:Complex Matrices Molecular Characterization Total Research and TechnologyGonfrevilleBP 2776700 HarfleurFrance

Breaking water-in-oil emulsions during the refining of crude oils is an important step before any upgrading process is *** molecules are incriminated as playing an important role in this *** the mechanisms behind the affinity between them and water is a key step to understand how to break these emulsions more easily and require lower amounts of *** which demulsifier molecule(s)to use is also primordial,but to do so rationally,one needs to know which are the molecular interactions in place between asphaltenes,porphyrins and water so that demulsifiers are chosen to destabilize a specific physical–chemical *** this paper,we study the interactions arising between asphaltenes and porphyrins and six different molecules potentially displaying a demulsification action in the presence of water/oil *** demonstrate that the ionic demulsifier molecules present an interesting potential to either interact strongly with water,replacing asphaltenes in this interaction,or to interact with the active sites of asphaltenes,deactivating them and avoiding any asphaltenic interfacial ***,we also found that although asphaltenes do not migrate spontaneously toward the water/oil interfaces,porphyrins do so rather *** indicates that porphyrins do have an important activity at the water/oil interface.

关键词： Asphaltenes aggregation Petroporphyrins Molecular dynamics Emulsion Water-oil interface demulsifiers

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Investigation on the properties of non-polyether demulsifiers on the demulsibility of crude oil-in-water emulsion

Investigation on the properties of non-polyether demulsifier...

引用

中国化学会第二届全国有机自由基化学会议

作者：任朝华黄璟长江大学化学与环境工程学院

A series of non-polyether demulsifiers were prepared by micelle water solution polymerization with raw materials of acrylic acid, methacrylic acid, butyl acrylate, methyl methacrylate, styrene and so on. The demulsibility of the prepared crude oil-in-water emulsion was carried out by the above demulsifiers with the bottle test method. The effect of constitutes and structure of demulsifiers molecule on demulsibilities was studied by the experiment of demulsifying simulated crude oil emulsion. The experimental data indicate that the demulsibility of non-polyether demulsifiers containing hydrophilic group which have hydrophilic-lipophilic structure of molecules so as to reduce the intention of oil-water interface film and increase the activity of dynamic interface, exceed the counterpart of lipophilic demulsifiers which have not hydrophilic-lipophilic structure of molecules. Especially, non-polyether demulsifiers with the hydrophilic group of less than 20 weight percent in its molecular have prominent demulsibilities. And the data also indicate non-polyether demulsifiers which have phenyl group of 29 to 62 weight percentage have excellent demulsifying performance owing to good solubilization and intersolubility between the demulsifiers and natural emulsifier, especially such as asphaltene and pectin. Compared with the demulsibility of several industrial grade demulsifiers which fall into polyether demulsifiers, the non-polyether demulsifiers which contain the certain ratio of phenyl group in the molecular unit are excellent in the demulsibility of crude oil-in-water emulsion.

关键词： Acrylic acid Styrene Free radical polymerization demulsifiers Hydrophilic group Aryl group Asphaltene

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Formation,stabilization and chemical demulsification of crude oil-in-water emulsions:A review

引用

Petroleum Research 2022年第4期7卷 459-472页

作者： Edith Yonguep Kashala Fabrice Kapiamba Katende Jonathan Kabamba Mahabubur Chowdhury Department of Chemical Engineering Cape Peninsula University of TechnologySymphony WayPO Box 1906Bellville7535Cape TownSouth Africa Department of Civil Architectural and Environmental EngineeringMissouri University of Science and TechnologyRollaMO65401USA

The crude oil recovery process is frequently associated with the formation of stable emulsions due to factors such as turbulent flow in pipelines and the presence of surface-active substances that naturally occur in crude *** emulsions are undesirable for the petroleum industry because their destruction/treatment adds to the overall production cost and causes the loss of valuable amounts of crude ***,it is essential,for economic and environmental reasons,to optimize the crude oil demulsification *** effective treatment of crude oil emulsions requires understanding of the process and factors leading to their formation and *** this sense,suitable treatment methods and possible preventive measures to avoid their formation can be *** present study reviews recent oilfield emulsion types and the factors responsible for their formation and *** different demulsification techniques employed were then extensively *** tech-niques include mechanical,thermal,electrical,and chemical methods with different demulsification mechanisms affected by many factors such as emulsions type and properties,demulsifiers characteris-tics,presence of solids stabilized emulsions,*** demulsification efficiency depends on the operating parameters of the process,the economics involved,and the environmental impact,which are the main factors considered in selecting a suitable demulsification *** research on the demulsifi-cation of crude oil emulsions should focus on real crude oil emulsions studies at a pilot scale level,the effect of aging on crude oil emulsions,the combination of multiple demulsification techniques and their synergistic effects,and the use of natural,ecofriendly demulsifiers.

关键词： Crude oil Enhanced oil recovery Emulsions Stabilization Demulsification Surfactants demulsifiers Coalescence

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：