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

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Petroleum Science 2022年第4期19卷 1793-1802页

作者： Guang-Yu Sun Hao Zhang Dai-Wei Liu Chuan-Xian Li Fei Yang Bo Yao Ze Duan Xin-Ya Chen Fu-Jun Sheng College of Pipeline and Civil Engineering China University of Petroleum(East China)Qingdao266580ShandongPeople's Republic of China Shandong Key Laboratory of Oil&Gas Storage and Transportation Safety Qingdao266580ShandongPeople's Republic of China

In petroleum industry, crude oil emulsions are commonly formed in oilfields. The asphaltenes and fine particles in crude oil may affect the stability of the emulsions by adsorbing at the water/oil interface. In this research, the effect of silica nanoparticles and asphaltenes on emulsion stability is explored first. The asphaltenes are proved to benefit emulsion stability. Unlike the asphaltenes, however, the modified silica nanoparticles may have positive or negative effect on emulsion stability, depending on the asphaltene concentration and aggregation degree in the emulsions. Further, it is confirmed by conducting interfacial experiment that the asphaltenes and particles can adsorb at the interface simultaneously and determine the properties of the interfacial layer. More in-depth experiments concerning contact angle and asphaltene adsorption amount on the particles indicate that the asphaltenes can modify the wettability of the particles. Higher concentration and lower aggregation degree of the asphaltenes can increase their adsorption amount on the surface of particles and then improve the modification effectiveness of the particles. Resultantly, the particles with good modification effectiveness can enhance the emulsion stability while the particles with poor modification effectiveness will weaken the emulsion stability.

关键词： Asphaltene Silica nanoparticle Co-adsorption behavior Modification effectiveness emulsion stability

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A Simple and Effective Test Method of the emulsion stability

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Chinese Journal of Chemical Engineering 2001年第2期9卷 200-203页

作者：李啸风陈志荣李浩然韩世钧 DepartmentofChemistry，Hangzhou310027 China DepartmentofChemicalEngineering ZhejiangUniversityHangzhou310027China

An innovational test method was developed on the basis of redefinition of the emulsion stability. The stability was characterized by relative volume percentage of disperse phase demulsified thoroughly from the top part and the bottom part of an emulsion sample, each weighting the same amount, after being settled for a given time at constant temperature. Three series of emulsions were prepared and tested successfully, which were emulsions of paraffin oil and water stabilized with polyoxyethylene lauryl ether series (AEO3 and AEO9) at various HLBs, and emulsions of rapeseed oil and water stablized with sorbitan monoleate (Span80) and each of polyoxyethylene (20) sorbitan carboxylic esters (Tween20, Tween40, Tween60, Tween80 and Tween85) at different HLBs. It provedthat this method is especially workable while the boundaries are opaque in a wide range of HLBs and is capable of offering an accurate optimum HLB.

关键词： emulsion stability stability number optimum HLB

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Nanoparticle stabilized emulsion with surface solidification for profile control in porous media

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Petroleum Science 2022年第2期19卷 800-808页

作者： Yi-Ning Wu Xiang Yan Ke Xu Ruo-Yu Wang Meng-Jiao Cao Xiao-Da Wang Yuan Li Cai-Li Dai Shandong Key Laboratory of Oilfield Chemistry School of Petroleum EngineeringChina University of Petroleum(East China)Qingdao266580PR China Key Laboratory of Unconventional Oil&Gas Development China University of Petroleum(East China)Ministry of EducationQingdao266580PR China Department of Energy and Resources Engineering College of EngineeringPeking UniversityBeijing100871China Dongxin Oil Production Plant Shengli Oilfield CompanySINOPECDongying257000China College of Chemical Engineering Fuzhou UniversityFuzhou350116China

Profile control is utilized to redirect the injection water to low permeability region where a large amount of crude oil *** gel particles are the commonly used agent for redistributing water by blocking the pores in high permeability *** the capability of deep penetration of performed gel particles is ***,we formulate nanoparticle stabilized emulsion(NSE).The stability and the effect of NSE on the fluid redirection in a three-dimensional porous medium were *** usingμ-PIV(particle image velocimetry),it was found that the velocity gradient of continuous fluid close to the nanoparticle stabilized droplets is much higher than that close to surfactant stabilized *** behaves as solid particle in preferential seepage channels,which will decrease effectively the permeability,thereby redirecting the subsequent injection ***,NSE shows high stability compared with emulsion stabilized by surfactant in static and dynamic *** addition,water flooding tests also confirm that the NSE can significantly reduce the permeability of porous media and redirect the fluid *** results demonstrate NSE owns high potential to act as profile control agent in deep formation.

关键词： Nanoparticles emulsion stability Flow behavior Coalescence Profile control

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Determination of hydrophilic–lipophilic balance value and emulsion properties of sacha inchi oil

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Asian Pacific Journal of Tropical Biomedicine 2017年第12期7卷 1092-1096页

作者： Kiattiphumi Saengsorn Ampa Jimtaisong School of Cosmetic Science Mae Fah Luang University Chiangrai 57100 Thailand

Objective: To determine hydrophilic–lipophilic balance(HLB) value, stability of formulate emulsion and properties of sacha inchi ***: The physiochemical characteristics of sacha inchi oil were first *** radical scavenging property was studied by DPPH assay. HLB value of sacha inchi oil was experimentally determined by preparing the emulsion using emulsifiers at different HLB value. Sacha inchi oil emulsion was prepared using the obtained HLB and its stability was conducted by centrifugation, temperature cycling, and accelerated stability test. The efficiency of the prepared emulsion was clinically investigated by 15 volunteers. The primary skin irritation was performed using closed patch test. Subjective sensory assessment was evaluated by using 5-point hedonic scale ***: Peroxide value of sacha inchi oil was 18.40 meq O2/kg oil and acid value was1.86 KOH/g oil. The major fatty acids are omega-3(44%), omega-6(35%) and omega-9(9%). The vitamin E content was 226 mg/100 g oil. Moreover, sacha inchi oil(167 ppm)and its emulsion showed 85% and 89% DPPH inhibition, respectively. The experimental HLB value of sacha inchi oil was 8.5. The sacha inchi oil emulsion exhibited good stability after stability test. The emulsion was classified as non-irritant after tested by primary skin irritation method. The skin hydration value significantly increased from38.59 to 45.21(P emulsion for 1 month and the overall product satisfaction of volunteers after use was with score of ***: This work provides information on HLB value and emulsion properties of sacha inchi oil which is useful for cosmetic and pharmaceutical application.

关键词： Sacha inchi oil Hydrophilic–lipophilic balance value emulsion stability Efficacy test Sensory test

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Performance and emission characteristics of a diesel engine operating on different water in diesel emulsion fuels:optimization using response surface methodology(RSM)

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Frontiers in Energy 2019年第4期13卷 636-657页

作者： Seyed Saeed HOSEINI Mohammad Amin SOBATI School of Chemical Engineering Iran University of Science and Technology(IUST)Tehran 16765163Iran

The nitrogen oxide(NOx)release of diesel engines can be reduced using water in diesel emulsion fuel without any engine *** the present paper,different formulations of water in diesel emulsion fuels were prepared by ultrasonic *** water droplet size in the emulsion,polydisperisty index,and the stability of prepared fuel was examined,***,the performance characteristics and exhaust emission of a single cylinder air-cooled diesel engine were investigated using different water in diesel emulsion *** effect of water content(in the range of 5%-10% by volume),surfactant content(in the range of 0.5%-2% by volume),and hydrophilic-lipophilic balance(HLB)(in the range of 5-8)was examined using Box-Behnken design(BBD)as a subset of response surface methodology(RSM).Considering multi-objective optimization,the best formulation for the emulsion fuel was found to be 5%water,2% surfactant,and HLB of 6.8.A comparison was made between the best emulsion fuel and the neat diesel fuel for engine performance and emission characteristics.A considerable decrease in the nitrogen oxide emission(-18.24%)was observed for the best emulsion fuel compared to neat diesel fuel.

关键词： water in diesel emulsion fuel hydrophiliclipophilic balance(HLB) response surface methodology(RSM) emulsion stability engine performance exhaust emission

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Influences of water treatment agents on oil-water interfacial properties of oilfield produced water

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Petroleum Science 2013年第3期10卷 415-420页

作者： Guo Jixiang Cao Jingjing Li Mingyuan Xia Haiying Enhanced Oil Recovery Institute China University of Petroleum Engineering Technology Institute of Southwest Petroleum Branch Company

The emulsion stability of oilfield produced water is related to the oil-water interfacial film strength and the zeta potential of the oil droplets. We investigated the effects of water treatment agents （corrosion inhibitor SL-2, scale inhibitor HEDP, germicide 1227, and flocculant polyaluminium chloride PAC） on the stability of oilfield produced water. The influence of these treatment agents on oil-water interfacial properties and the mechanism of these agents acting on the oilfield produced water were studied by measuring the interfacial shear viscosity, interfacial tension and zeta electric potential. The results indicated that the scale inhibitor HEDP could increase the oil-water interfacial film strength, and it could also increase the absolute value of the zeta potential of oil droplets. HEDP played an important role in the stability of the emulsion. Polyaluminum chloride （PAC） reduced the stability of the emulsion by considerably decreasing the absolute value of the zeta potential of oil droplets. Corrosion inhibitor SL-2 and germicide 1227 could decrease the oil-water interfacial tension, whereas they had little influence on oil-water interfacial shear viscosity and oil-water interfacial electricity properties.

关键词： Water treatment agents oil-water interracial properties emulsion stability oilfield produced water

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Effect of Petroleum Sulphonate on Interfacial Property and stability of Crude Oil emulsions

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Chinese Journal of Chemical Engineering 2005年第5期13卷 691-695页

作者：王慧云李明远吴肇亮林梅钦 EOR Research Center of China University of Petroleum Beijing

The influence of petroleum sulphonate (TRS) on interfacial properties and stability of the emulsions formed by formation water and asphaltene, resin and crude model oils from Gudong crude oil was investigated by measurement of interfacial shear viscosity, interfacial tension (IFT) and emulsion stability. With increasing petroleum sulphonate concentration, IFT between the formation water and the asphaltene, resin and crude model oils decreases significantly. The interfacial shear viscosity and emulsion stability of asphaltene and crude model oil system increase for the petroleum sulphonate concentration in the range 0.1% to 0.3%, and decrease slightly when the concentration of the surfactant is 0.5%. There exists a close correlation between the interfacial shear viscosity and the stability of the emulsions formed by asphaltene or crude model oils and petroleum sulphonate *** stability of the emulsions is determined by the strength of the interfacial film formed of petroleum sulphonate molecules and the natural interfacial active components in the asphaltene fraction and the crude oil. The asphaltene in the crude oil plays a major role in determining the interfacial properties and the stability of the emulsions.

关键词： asphaltene petroleum sulphonate (TRS) interfacial tension interfacial shear viscosity emulsion stability

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Investigating Factors Influencing the stability of Enteral Nutritional emulsions Designed for Cancer Patients

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Journal of Nutritional Oncology 2021年第3期6卷 140-148页

作者： Qin Qin Li Dan Ping Hou Zhuang Ding Sangeeta Prakash Yu Ying Liu Han Ping Shi Jun Han Zheng Ping Wang Institute of BioPharmaceutical Liaocheng UniversityLiaocheng252000ShandongChina Liaocheng High-tech Biotechnology Co. Ltd.Liaocheng 252000ShandongChina School of Agriculture&Food Sciences The University of QueenslandBrisbaneQLD 4072Australia Department of Gastrointestinal Surgery/Department of Clinical Nutrition Beijing Shijitan HospitalCapital Medical UniversityBeijing 100038China

Objective A commercially available reference product was“re-engineered”and the target emulsion was formulated to contain the same energy density,as well as the same percentage of energy sources,as the reference *** particle size and distribution,polydispersity index(PDI),and zeta-potential of emulsions were measured as indices to analyse the quality of the *** The centrifugal stability(Ke)was examined as the main measure of the stability of the target *** parameters affecting the stability of emulsions were also determined,while the temperature was fixed at 30℃,shear speed at 3500 r/min,and shear time was 15 *** optimal quantity of emulsifier was also studied in the crude *** A relatively stable emulsion could be obtained by using PC-50 at a dosage of 2%as the emulsifier.A 2∶1 proportion of whey protein to casein,a 1∶1 proportion of maltodextrin(DE 10-15)to maltodextrin(DE 15-20)and medium chain triglyceride(MCT)in powder form were used to obtain the most desirable *** This study explored the critical parameters that influence the stability of a total nutrition enteral emulsion designed for cancer patients,providing useful information for further industrialisation of this and other emulsion products.

关键词： Food for Special Medical Purposes Enteral nutritional emulsion emulsion stability Functional food,Cancer nutrition

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Development and Performance Evaluation of a Deep Water Synthetic Based Drilling Fluid System

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Open Journal of Yangtze Oil and Gas 2020年第4期5卷 165-175页

作者： Zengwei Chen Yongxue Lin Ninghui Dou Chao Xiao Hua’an Zhou Yu Deng Yuqiao Zhou Song Wang Dichen Tan Huaiyuan Long State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development Beijing China Sinopec Research Institute of Petroleum Engineering Beijing China Drilling Fluid Technical Service Company of Chuanqing Drilling Engineering Co.. Ltd. Cheng du China Yangtze University Jingzhou China

With the enhancement of environmental protection awareness, the requirements on drilling fluid are increasingly strict, and the use of ordinary oil-based drilling fluid has been strictly restricted. In order to solve the environmental protection and oil-gas reservoir protection problems of offshore oil drilling, a new synthetic basic drilling fluid system is developed. The basic formula is as follows: a basic fluid (80% Linear a-olefin + 20% Simulated seawater) + 2.5% nano organobentonite + 3.5% emulsifier RHJ-5# + 2.5% fluid loss agent SDJ-1 + 1.5% CaO + the right amount of oil wetting barite to adjust the density, and a multifunctional oil and gas formation protective agent YRZ has been developed. The performance was evaluated using a high-low-high-temperature rheometer, a high-temperature and high-pressure demulsification voltage tester, and a high-temperature and high-pressure dynamic fluid loss meter. The results show that the developed synthetic based drilling fluid has good rheological property, demulsification voltage ≥ 500 V, temperature resistance up to 160°C, high temperature and high pressure filtration loss < 3.5 mL. After adding 2% - 5% YRZ into the basic formula of synthetic based drilling fluid, the permeability recovery value exceeds 90% and the reservoir protection effect is excellent. The new synthetic deepwater drilling fluid is expected to have a good application prospect in offshore deepwater drilling.

关键词： Deep Water Drilling Synthetic Based Drilling Fluid Rheological Property emulsion stability Filtration Agent of Reservoir Protection

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Formulation and Optimization of New Spreads Based on Olive Oil and Honey: A Response Surface Methodology Box-Benken Design

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Food and Nutrition Sciences 2022年第4期13卷 358-372页

作者： Asma Tekiki Ichrak Charfi Raoudha Helal Salwa Bornaz Laboratory of Innovation and Valorisation for a Sustainable Food Industry High School of Food Industries of Tunis Carthage University of Tunis Tunis Central Laboratory of Analysis and Testing of Tunis Tunis

Bread spread is one of the fundamental foods in human diets. Generally, cheese spread, butter, chocolate spread, and margarine are the most consumed. In the last decade, a new concept alimentary has been integrated, it was low fat spread or functional spread. This work is an attempt to formulate and optimize new low-fat spreads based on olive oil and honey using a response surface methodology box-benken design. To optimize its stability and its textural properties under the effects of three factors, beeswax content, stirring time, and stirring speed. Results revealed that the best mixture was the formulation that contained 1% beeswax, 79% honey, and 20% olive oil, formulated under 6.39 min of time stirring at 15,428 rpm speed. The beeswax was the major factor showing the highest effect on all the properties of spreads.

关键词： Beeswax Olive Oil Honey Spread emulsion stability Textural Properties

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