4.7 Article

Isolation and Characterization of Interfacially Active Molecules from Asphaltene and Maltene Fractions

相关参考文献

注意:仅列出部分参考文献,下载原文获取全部文献信息。
Article Energy & Fuels

Effect of Solvents on the Stability of Water-in-Bitumen Emulsions

Harvey Yarranton et al.

Summary: This study investigated the role of solvent in stabilizing water-in-oil emulsions below and above the onset of asphaltene precipitation. The stability of the emulsions was found to increase significantly at the onset of precipitation, attributed to the increased irreversible adsorption of asphaltenes at the interface. However, at high n-alkane contents, the emulsions became less stable as more asphaltenes were precipitated out of solution. Therefore, oils near the onset of asphaltene precipitation are more likely to experience problematic emulsions.

ENERGY & FUELS (2022)

Article Energy & Fuels

Electrodeposition of bitumen-, asphaltene-, or maltene-coated kaolinite from cyclohexane suspensions

Hanyu Zhang et al.

Summary: The charge characteristics of kaolinite samples coated with bitumen, asphaltene, or maltene were studied using electrodeposition. It was found that bitumen-coated and maltene-coated kaolinite deposited on the anode, while asphaltene-coated kaolinite deposited on both anode and cathode. The carboxyl groups in the organic coating layer were the main factor contributing to the negative charges of the coated kaolinite, with higher concentrations in bitumen and maltene coatings compared to asphaltene coating. XPS analyses confirmed the higher nitrogen content in the cathode-deposited organic-coated kaolinite films and the presence of carbon and sulfur species with higher oxidation states associated with oxygen in the anode-deposited films.
Article Energy & Fuels

Influence of asphaltenes and resins on water/model oil interfacial tension and emulsion behavior: Comparison of extracted fractions from crude oils with different asphaltene stability

Caiua Araujo Alves et al.

Summary: This study compares the effects of asphaltene stability from two different crude oil samples on water-model oil interfacial tension and emulsion stability. The size of molecules in the feedstock has a predominant effect on reducing interfacial tension, while larger molecules are responsible for emulsion stability.

JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING (2022)

Article Energy & Fuels

Entrapment of Asphaltene-Stabilized Emulsions in Microfluidic Porous Media

Yu-Jiun Lin et al.

Summary: This study characterizes the entrapment of asphaltene-stabilized water/brine-in-oil emulsions in microfluidic porous media by two mechanisms: adhesion and hydrodynamic bridging. Lower water fractions result in droplet adhesion to deposited asphaltenes, while erosion and bridging between droplets become more prevalent at higher water fractions. The addition of salinity weakens adhesion but leads to increased droplet size and enhanced bridging. Higher salinity also reduces interface elasticity, resulting in larger emulsions with more erosion and bridging.

ENERGY & FUELS (2022)

Article Energy & Fuels

Characterization of crude oil interfacial material by high-resolution mass spectrometry

Jianxun Wu et al.

Summary: This study separated natural interfacial materials (IMs) from crude oils in different regions of China using the wet silica adsorption method. High resolution mass spectrometry was used to reveal the functional groups of the separated IMs. The composition of IMs varied greatly among different crude oils, including both naturally occurring compounds and artificially introduced chemicals.

JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING (2022)

Article Energy & Fuels

Co-adsorption behavior of aggregated asphaltenes and silica nanoparticles at oil/water interface and its effect on emulsion stability

Guang-Yu Sun et al.

Summary: In the petroleum industry, the stability of crude oil emulsions is affected by the presence of asphaltenes and fine particles at the water/oil interface. This study explores the impact of silica nanoparticles and asphaltenes on emulsion stability. It is found that asphaltenes contribute to emulsion stability, while the effect of modified silica nanoparticles can be positive or negative depending on the asphaltene concentration and aggregation degree. Experimental results confirm that asphaltenes and particles can adsorb at the interface simultaneously, with asphaltenes modifying the wettability of particles. Higher asphaltene concentration and lower aggregation degree lead to increased adsorption and improved modification effectiveness of the particles, ultimately enhancing emulsion stability.

PETROLEUM SCIENCE (2022)

Review Energy & Fuels

Stabilization mechanism and chemical demulsification of water-in-oil and oil-in-water emulsions in petroleum industry: A review

Duo Wang et al.

Summary: Emulsions frequently encountered in petroleum production pose technical challenges and increase costs. Chemical treatment with demulsifiers plays a vital role in destabilizing the complex emulsions, but developing effective and cost-efficient demulsifiers remains challenging. This review systematically examines the stabilization mechanisms of emulsions and categorizes demulsifiers for water-in-oil and oil-in-water emulsions, providing insights into efficient demulsification methods.
Article Energy & Fuels

Vanadium and nickel distributions in Pentane, In-between C5-C7 Asphaltenes, and heptane asphaltenes of heavy crude oils

Martha L. Chacon-Patino et al.

Summary: This study investigated the distributions of vanadium and nickel in Venezuelan heavy crude oils using various analytical methods. The results showed a strong correlation between petroleum elution and high hydrogen deficiency and increased heteroatom levels. Additionally, the solubility of asphaltenes decreased in the order of Entrained C5 Maltenes, In-between C5-C7 asphaltenes, and C7 asphaltenes. Mass spectrometry analysis revealed bimodal and multimodal distributions of vanadyl and nickel porphyrins, indicating a complex chemical nature in the heavy crude oil fractions studied.
Article Energy & Fuels

Adsorption Kinetics of Asphaltenes at the Heptol-Water Interface

Mohammadjavad Mohammadi et al.

ENERGY & FUELS (2020)

Review Chemistry, Multidisciplinary

Recent Developments on the Elucidation of Colloidal Aspects of Asphaltenes and Their Relevance to Oilfield Problems

Lia B. S. Balestrin et al.

JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY (2020)

Article Energy & Fuels

Functional Molecules and the Stability of Water-in-Crude Oil Emulsions

Deepa Subramanian et al.

ENERGY & FUELS (2017)

Article Energy & Fuels

Interfacial Properties of Asphaltenes at the Heptol-Brine Interface

Chuntian Hu et al.

ENERGY & FUELS (2016)

Article Energy & Fuels

Detection and Impact of Carboxylic Acids at the Crude Oil Water Interface

Simon Ivar Andersen et al.

ENERGY & FUELS (2016)

Article Chemistry, Physical

Reduction of Water/Oil Interfacial Tension by Model Asphaltenes: The Governing Role of Surface Concentration

Cuiying Jian et al.

JOURNAL OF PHYSICAL CHEMISTRY B (2016)

Article Energy & Fuels

Novel Method To Isolate Interfacial Material

Jacqueline M. Jarvis et al.

ENERGY & FUELS (2015)

Article Chemistry, Physical

Measurement of surface and interfacial tension using pendant drop tensiometry

Joseph D. Berry et al.

JOURNAL OF COLLOID AND INTERFACE SCIENCE (2015)

Article Chemistry, Multidisciplinary

Interfacial Properties of Asphaltenes at Toluene-Water Interfaces

Sharli Zarkar et al.

LANGMUIR (2015)

Article Energy & Fuels

FT-ICR MS analysis of asphaltenes: Asphaltenes go in, fullerenes come out

Thieres M. C. Pereira et al.

Article Energy & Fuels

Water-in-Crude Oil Emulsion Stabilization: Review and Unanswered Questions

Peter K. Kilpatrick

ENERGY & FUELS (2012)

Article Chemistry, Multidisciplinary

The Influence of Asphaltenes Subfractions on the Stability of Crude oil Model Emulsions

Siller O. Honse et al.

JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY (2012)

Article Energy & Fuels

Stabilization of Water in Crude Oil Emulsions. Part 2

Jan Czarnecki

ENERGY & FUELS (2009)

Article Chemistry, Multidisciplinary

Rheology of asphaltene - Toluene/water interfaces

DM Sztukowski et al.

LANGMUIR (2005)

Article Energy & Fuels

Asphaltene monolayers at a toluene/water interface

LY Zhang et al.

ENERGY & FUELS (2005)

Article Chemistry, Analytical

Petroleomics: MS returns to its roots

RP Rodgers et al.

ANALYTICAL CHEMISTRY (2005)

Article Chemistry, Multidisciplinary

Interfacial rheology of petroleum asphaltenes at the oil-water interface

PM Spiecker et al.

LANGMUIR (2004)