Dissertation > Excellent graduate degree dissertation topics show

Theoretical and Experimental Study of Anionic Surfactant Adsorbed Behavior at Water/Oil Interface

Author: YuLiJun
Tutor: ZhangJun
School: China University of Petroleum
Course: Materials Science and Engineering
Keywords: Surfactant Interfacial tension Molecular dynamics simulation Enhanced Oil Recovery Mechanism
CLC: O647.31
Type: Master's thesis
Year: 2011
Downloads: 174
Quote: 0
Read: Download Dissertation

Abstract


Surfactants can reduce the interfacial tension, change the emulsifying properties of crude oil in the formation, can greatly improve the efficiency of the wash oil, thereby enhancing oil recovery. Due to the the reservoir complex environment, the surfactant with the oil phase and an aqueous phase in the formation mechanism of action is affected by many factors, severely restricted the surfactant flooding mechanism for basic research, adverse to promote its complex reservoir Application. The paper Select oilfield commonly used anionic surfactant sodium dodecyl sulfate (SAS), sodium dodecylbenzenesulfonate (SDBS), sodium dodecyl sulfate (SDS), and polyoxyethylene lauryl ether sulfate sodium (AES) as the research object; method of combining experiments and computer simulations, to carry out research in the adsorption behavior of the oil-water interface and the microscopic mechanism of four surfactants. The experimental results show that: under the same experimental conditions, the the four surfactant in n-dodecane / water interface to reduce the interfacial tension of order for AES GT; the SDBS gt; SDS gt; SAS; different oil (alkanes) / water at four surfactants reduce oil-water interfacial tension of difference, but at the same tension as low as n-decane / water interface interface; influence of temperature on the interfacial activity of the surfactant is more complex, but overall, SDBS and AES surfactant has a certain temperature performance, at higher temperatures still able to reduce the interfacial tension; the salt tolerance of different surfactants having a larger difference, SDBS and AES molecules in a certain The concentration of NaCl solution interfacial tension can be reduced to 10 -1 mN / m, but AES molecules can be maintained in a wider concentration range lower the interfacial tension, the divalent metal ions (Ca < sup> 2 the the Mg 2 ) in the solution environment, the salt tolerance of SDBS molecules Terrible solution will precipitate a lot of precipitation, AES molecule has a good resistance to inorganic salts. Computer simulation results show that: the surfactant in the oil-water interface to form a stable monolayer film can be formed by calculating the interface, the thickness of the interface layer, the radial distribution function, the coordination number, the order parameter, the diffusion coefficient and the rotation time of the correlation function The capacity parameters, from theory to evaluate the four surfactants reduce the interfacial tension as follows: AES gt; SDBS GT; SDS GT; SAS; monolayer of SDS molecules in the four oil phase to reduce the interfacial tension were as follows: the decane GT; octane GT; dodecane GT; hexadecane; the AES molecular monolayer at different temperatures reduce the ability of the oil-water interfacial tension as follows: 343K gt; 313 K gt; 353 K gt; 328 K. Theoretical evaluation results are fully consistent with the experimental results.

Related Dissertations

  1. Application of Additives’ Drag Reducing Technology in District Heating System,TU995
  2. Effectiveness Comparison of Different Solvents in Organochlorine Pesticide (OCP)-Contaminated Soil Flushing and Optimization of Flushing Parameters,X592
  3. Studies on the Isolation of Oil-Degrading Bacteria with Biosurfactant Production and Their Characteristics,X172
  4. Hydrophilic structure of different types of surface -modified polyurethane material and coagulation 12 factor nine peptide fragments,and fibrinogen P1 fragment of computer simulation of the interaction,O631.3
  5. Adsortions of Dye by Modified Activated Carbon and Heavy Metals by Rice Husk-Based Activated Carbon,X703
  6. Determination of Organophosphorus Pesticides Residues by Fluorescence Method and Its Application,O657.39
  7. Experimental Study of Wettability of Coal and New Wetting Agent,TD714
  8. Molecular Dynamics Simulations of Temperature Effects on Pt/Au Heteroepitaxial Growth,O484.1
  9. Molecular Dynamics Simulations of Structural Relaxation of Two-dimensional Lattice Mismatch Epitaxial Aluminum Thin Film,O484.1
  10. Activition of Surfactant Protein A and D in Aspergillus Fumigatus-Induced Innate Immune Responses in Human Cornea Epithelial Cells,R772.21
  11. Study on the Properties of the Mixed Systems with Betaines,TQ423.3
  12. The Preparation of Modified Siloxane Surfactant and Its Application in Emulsifying Silicone Oil,TQ423
  13. Synthesis and Properties of Functional Waterborne Polyurethane Coatings,TQ633
  14. Pesearch of Manufacuture and Application of Environmental Friendly Detergents,TQ649.5
  15. Synthesis and Surface-active Properties of Novel Quaternary Ammonium Salt Gemini Surfactants,TQ423
  16. Synthesis of Uniform Magnetite Nanoparticles Via W/O Interface System Applied as Bio-Labels,TB383.1
  17. Study on the Subsititute of Inorganic Salt Used in Active Dyeing on Cotton,TS193.5
  18. Study on Hydrophobic Modification of Sodium Carboxymethyl Cellulose and Ph-Sensitive Hydrogel,O631.3
  19. Different electrical properties of carbon nanotubes covalently modified FAD molecular dynamics simulation,TB383.1
  20. Colliers were dispersed system of preparation and application performance,TQ610.1
  21. Sulfonic acid type gemini surfactants in the application of silicone emulsion,TQ316.3

CLC: > Mathematical sciences and chemical > Chemistry > Physical Chemistry ( theoretical chemistry ),chemical physics > The physical chemistry of surface phenomena > Adsorption > Adsorption theory
© 2012 www.DissertationTopic.Net  Mobile