A5049949505- Enhanced Oil Recovery Techniques
- Surfactants and Colloidal Systems
- Petroleum Processing and Analysis
- Hydraulic Fracturing and Reservoir Analysis
- Pickering emulsions and particle stabilization
- Spectroscopy and Quantum Chemical Studies
- Analytical Chemistry and Chromatography
- Phase Equilibria and Thermodynamics
- Hydrocarbon exploration and reservoir analysis
- Block Copolymer Self-Assembly
- Mesoporous Materials and Catalysis
- CO2 Sequestration and Geologic Interactions
- Drilling and Well Engineering
- Microfluidic and Capillary Electrophoresis Applications
- Innovative Microfluidic and Catalytic Techniques Innovation
- Microbial bioremediation and biosurfactants
- Polymer Surface Interaction Studies
- Carbon Dioxide Capture Technologies
- Nanomaterials for catalytic reactions
- Catalysis for Biomass Conversion
- Enzyme Structure and Function
- Zeolite Catalysis and Synthesis
- Semiconductor materials and devices
- Chemical Reaction Mechanisms
- Oil and Gas Production Techniques
Sinopec (China)
2004-2024
Shihezi University
2024
Shanghai Research Institute of Chemical Industry
2022
Guangdong University of Technology
2016
China University of Petroleum, East China
2013
Shandong University
2005-2011
Tsinghua University
1995
A multiscale stability study of foams stabilized by sodium dodecyl sulfate (SDS), dodecylbenzene sulfonate (SDBS), and polyoxyethylene alkylether (AES) was conducted, to investigate the relationship surfactant molecular behavior interfacial monolayer configuration foam film properties. Molecular dynamic (MD) simulations using a full-atom model utilized explore microscopic features air/liquid interface layer. Several parameters such as distribution head groups order degree hydrophobic tails...
High performance liquid chromatography (HPLC) is a key analytical technique that used in number of fields. Improving the separation efficiency, stability, and universality HPLC has been continuing analytical-chemistry focus. In chromatographic separation, factors such as composition ratio mobile phase, type stationary dimensions column significantly affect efficiency. addition, temperatures phase are also important for achieving separation. The oven usually to stably control temperature...
The mass transfer between CO2 and crude oil is crucial for CO2-EOR. However, traditional methods are complex time-consuming, leading to slow progress in the study of oil. This employed microfluidic technology generate gas–liquid slug flow rapid investigation process within ∼30 s. A method was developed eliminate pressure drop term, suitable studies systems where liquid phase's high viscosity led a high-pressure drop. systematically investigated effects gas rates, temperature, type...
Biosurfactants exhibit outstanding interfacial properties and unique biological activities that fairly related to their self-assembly in solutions at interfaces. Computational simulations provide structural details of biosurfactant aggregates the molecular level relevant thermodynamic properties, but understanding kinetics remains limited due lower simulation efficiency. In this work, a coarse-grained model has been developed for microbial lipopeptide surfactin, surfactin monolayer...
Abstract Surfactant monolayers at the interface between oil and water has been simulated using dissipative particle dynamics (DPD) technique. With a simple coarse-grained model, how variations in structure of surfactants influence their ability to reduce interfacial tension investigated. The result shows that strong hydrophilic head groups are beneficial make surfactant molecules more stretched ordered, help enhance efficiency interface, it is decrease if hydrophobic chains have similar...
Summary Mixtures of anionic/cationic surfactants have never been used in enhanced oil recovery (EOR) for negatively charged sandstone reservoirs because high adsorption. Recently, novel mixtures that produced low critical micelle concentrations (CMCs) 3.50×10–4 wt%, ultralow interfacial tension (IFT) 10–4 mN/m, solubilization 23, and adsorption 0.27 mg/g sand were developed the laboratory a mature reservoir with characteristics temperature 81°C, water cut 97.8%, factor 53.3%, low-acid 0.021...
Summary The first pilot test of a surfactant/polymer (SP) flood in the world with mixtures anionic/cationic surfactants (Sa/c) was performed high-temperature and low-permeability sandstone reservoir high content clay to demonstrate potential this novel technique improve oil recovery. Low critical micelle concentration 2.78×10−6 mol/L, ultralow interfacial tension (IFT) 10−3 10−4 mN/m when surfactant concentrations were greater than 0.025 wt%, lower phase microemulsion solubilization ratio...
Abstract Surfactants are widely used in enhanced oil and gas recovery. usually injected into wells reservoirs that released full upon the addition, effectiveness lasts very short. Slow‐release surfactant is preferred to be effective at an extended period. In this study, was encapsulated crosslinked hybrid hydrogel of polyvinyl alcohol (PVA) poly acrylamide‐2‐methyl propane sulfonic acid (PAMPS). The slow‐released high temperatures. Free radical polymerization polymerize crosslink PVA...
Abstract Biosurfactants show synergic effects with synthesized surfactant in reducing hydrophobic/hydrophilic interfacial tension, while the understanding of synergistic mechanism is limited. In present work, mixed monolayers surfactin and branched alkylbenzene sulfonate at n ‐decane/water interface were studied using atomistic molecular dynamics simulations, presence affecting microstructure dynamic properties monolayer was evaluated level. The density distributions surfactants along...
Abstract CO 2 ‐in‐water (C/W) foams have attracted much attention given their eco‐friendliness in recent years. However, limited surfactants were able to effectively adsorb at the supercritical –water (C–W) interface considering weak solvent strength of , especially high temperatures. Herein, attempts been made design suitable foaming agents by evaluating influence proportions anionic and cationic affinity between aminopropyl methyl siloxane (APSi) . Through systematical foamability foam...
Abstract Two foaming formulations, an amphoteric surfactant (noted as Fam) and a blend of anionic-cationic-amphoteric surfactants Facam) have been prepared tested at lab in field the presence high content condensate (60 vol% on average). Foam height with Facam are close to those Fam. Although Fam has better foam stability without condensate, half-life (t1/2) decreases by 50% condensate. generated shows oil resistance performance due negative spreading coefficient (S). Liquid unloading...
Surfactants are widely used as foaming agents to remove liquid accumulation in gas wells, enhancing natural production. The surfactant traditional foam sticks was dissolved and released a short period, especially at elevated downhole temperatures. This often requires the addition of maintain foam. To solve this problem, study studies utilization nano silica incorporate amphoteric surfactant, cocamidopropyl betaine (CAB), into mesoporous structure nanocomposite for controlled release CAB....
A direct and practical three-component tandem reaction of arynes, S-methyl-d3 sulfonothioate with sulfonamides or amides is developed. The highly efficient chemoselective, which allows mild synthesis trideuteromethylated sulfilimines broad substrate scope good functional group compatibility, giving the products in to excellent yields 92%–99% deuterium incorporation. Mechanism studies disclosed sulfenamide that generated situ key intermediate for reaction. This protocol provides potential...
Despite extensive investigations on the interfacial activities of mixed anionic and cationic surfactants (Sa/c), influence hydrophobic phase their assembly dilational rheology remains unaddressed. In this study, alkoxy carboxylate (anionic)/cetyltrimethylammonium chloride (cationic) surfactant mixtures was studied at various interfaces. The modulus Sa/c increases linearly with pressure interfaces air, n-hexane/n-octane/n-hexadecane, toluene. limit elasticity (ε0) is similar air alkane but...