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Chemical Engineering Department

Chemical Engineering Department. Towards Reducing the Adsorption of Surfactants on Carbonate Minerals. Hadi ShamsiJazeyi, George J. Hirasaki April 2011. Agenda. Introduction Problem Definition Adsorption Methods Results and Discussions Conclusion. Introduction.

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Chemical Engineering Department

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  1. Chemical Engineering Department Towards Reducing the Adsorption of Surfactants on Carbonate Minerals Hadi ShamsiJazeyi, George J. Hirasaki April 2011

  2. Agenda • Introduction • Problem Definition • Adsorption • Methods • Results and Discussions • Conclusion

  3. Introduction

  4. Why is Surfactant Adsorption important in EOR? • Enhanced Oil Recovery (EOR) • Surfactant Adsorption & EOR • Economy of Surfactant Injection • Chromatographic Separation • Wettability Alteration

  5. Problem Definition

  6. NIB Used in Chemical Flooding • Neodol-67 : • IOS15-18 • Lauryl Betaine • Previously used for ASF (Alkaline Surfactant Foam) in our group • Mobility Control + Low Interfacial Tension NIB-Blend

  7. What Caused this Retardation? NIB on Carbonate showed a retardation: CHROMATOGRAPHIC SEPARATION? (ADSORPTION) or DELAY in FOAM FORMATION?

  8. Adsorption

  9. Adsorption of NIB • To evaluate adsorption of NIB We investigate adsorption of NI and adsorption of Betaine, separately. • Why? • Easier to measure the concentration • Effect of NI and B can be determined separately on the adsorption

  10. Sacrificial Agents

  11. Our Tested Choices as Sacrificial Agent • Succinic Acid • Propionic Acid • Sodium Poly acrylate

  12. Methods

  13. Surfactants Used

  14. Procedure for Static Adsorption Experiment • Limestone Sand (Mesh 20-40) • 24 h equilibrium time • Measurement using potentiometric titration For NI-Blend: Hyamine 1622 For Betaine: Sodium tetraphenylborate N:I:B=4:1:10

  15. Results & Discussions

  16. Adsorption isotherm of NI-Blend on Limestone Sand 0.15 wt% initial concentration of NI-Blend Different weights = 2,3,4,4.5,6 (g) Room temperature, Limestone Sand (20-40) 24 (h) shaking 3.5 % NaCl, 10 (cc) solution used • Relatively low Adsorption

  17. Sacrificial Agents and Adsorption of Surfactants on Limestone Sand Betaine NI-Blend 0.3 wt% initial concentration of NI-Blend, Room temperature, Limestone Sand (20-40) 24 (h) shaking, 5(cc) NI-Blend + 5(cc) sacrificial agent solution, Simultaneously added, 3.5 wt% NaCl, solid weights = 4 (g). Concentration of sacrificial agents = 0.6 wt% 0.6 wt% initial concentration of Betaine, Room temperature, Limestone Sand (20-40) 24 (h) shaking, 5(cc) NI-Blend + 5(cc) sacrificial agent Simultaneously added. solution, 3.5 wt% NaCl, solid weights = 4 (g). Concentration of sacrificial agents = 1.2 wt%

  18. Conclusions

  19. Conclusions • On Limestone sand: Adsorption of Lauryl Betaine >> Adsorption of NI-Blend • Polyacrylate had the best results comparing to some other materials in reducing adsorption of NI and Betaine on limestone sand

  20. Future Work • Polymeric Sacrificial Agent vs. Same Monomeric ones • Effect of Equilibrating Sacrificial Agent Before Equilibrating Surfactant on Adsorption Reduction • Other Sacrificial Agents • Other Mechanisms of Adsorption • Optimal Concentration of Sacrificial Agents needed • 1D Dynamic Adsorption • How Reducing Adsorption can affect foam mobility in 1D ASF using NIB?

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