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I onic liquids enhanced solvent extraction for bitumen recovery from oil sands

I onic liquids enhanced solvent extraction for bitumen recovery from oil sands. Reporter: Zhang Jianqiang Academic Advisor ： Professor Sui. Contents. Project background and significance The progress report Subsequent experiment plan. Part 1. Pro ject B ackground A nd S ignificance.

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I onic liquids enhanced solvent extraction for bitumen recovery from oil sands

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  1. Ionic liquids enhanced solvent extraction for bitumen recovery from oil sands Reporter: Zhang Jianqiang Academic Advisor：Professor Sui

  2. Contents • Projectbackground and significance • The progressreport • Subsequent experiment plan

  3. Part 1. Project Background And Significance • What is oil sands？ Oil or tar sands are complex mixtures of sand, clays , water, and bitumen, a “heavy” or highly viscous oil. • Why did we do this project? Because the lack of the crude oil, then releasing the bitumen from the oil/tar sands has a practical significance.

  4. HWEP (hot water extraction process) • How? the methods have been used: Solvent/ILs extraction Extraction Supercritical fluid extraction Ultrasound-enhanced extraction Methods Microwave assisted extraction ATP(Aostar Taciuk Process) Destructive distillation Fluid coking

  5. Solvent/ILs extraction • The method we used is • Why? 1.lower pollution risk than the HWEP 2.Lower water consumption 3.Stable in room temperature: nonvolatile, nontoxic, nonflammable … …

  6. Part2. the Progress Report • What have we done? Exp1. Composite solvent (ethyl acetate/n-heptane) extract the bitumen from the oil sands(3.0±0.1g) in different ratio range from 0:6 to 4:6, the total volume is 16mL. Exp2.Ionic liquids enhanced solvent extraction for bitumen recovery from oil sands(3.0±0.1g)in different ratio range from 0:6 to 4:6, the total volume is 16mL, the volume of the ILs is 8mL. And firstly we have to calculate the distribution ratio of the ethyl acetate in n-heptane and [Emim][BF4] by GC(gas chromatograph ) Exp3. Orthogonal test

  7. Why did we design these three steps? Exp1&Exp2are to prove that the ILs can enhance the extraction of bitumen from the oil sands. Exp3was conducted to find the optimal conditions for the extraction.

  8. Oil Sands [Emim][BF4] Ethyl Acetate n-Heptane • The experiments block diagram(take the Exp2 for example, Exp1&Exp3 are similar with Exp2) Stirring by magnetic stirrers for 30 min, 25℃,400rpm Centrifuging for 5min, 7000rpm Repeat for 4 times Transfer the top layer to a clean weighted flask by pipette Adding fresh solvent to flask Distillation, Dry the bitumen in the oven at 110℃ for 4 hours, calculating the recovery ratio Recycle the solvents/ILs, keep the sands

  9. Results … …

  10. Part 3.Subsequent Experiment Plan • What shall we do next? • The component part of the bitumen The asphalt is not suitable for the downstream refinery. Or we can say it is useless in the commercial oil. Bitumen Asphaltene 5-25% Saturates 5-20% Aromatics 40-65% Resin 15-30%

  11. What will we plan to do in details? Our purpose: 1.Find the suitable composite solvent with ILs in the optimal conditions to extract the bitumen from the oil sands without asphaltene. 2.Or find the suitable solvent to release the asphalt from the bitumen after the extraction.

  12. How to design the Experiments? Firstly, we must understand the force between the sands and the bitumen in the solvent. Then we can use the atomic force microscope (AFM) to calculate the force.

  13. atom Expulsive force atom atom Attractive force atom the mechanism of imaging by AFM

  14. Outline: We plan to use the silica sphere (~40μm) as the sands, and silicon wafer(~15X15mm) spin-coated with bitumen or asphaltene, and then we can measure the force between the silica and bitumen/asphaltene in solvents circumstance.

  15. Steps: 1.Probe Particle Preparation: The silica sphere will be glued with the two-component epoxy

  16. How to glue the silica particle to the AFM cantilever?

  17. Scanning electron microscopy(SEM) photomicrograph of silicon powder Zoom In Zoom In

  18. 2.Preparation of the substrate bitumen/asphaltenefilm are spin-cast from toluene solution(10mg/ml) using the spin-caster. Silicon wafer size: 15mm×15mm Steps: 1.Last for 10s at 100rpm 2.Last for 20s at 3000rpm 3.Last for 60s at 5000rpm AFM image of the bitumen substrate

  19. 3. The contact angle measurements Conduct both before and after the AFM experiments to ensure that the film had neither detached from the silicon substrate nor been damaged during the AFM study.

  20. 4. Surface force measurement The solution is injected into the fluid cell slowly with great care to avoid trapping air bubbles. Both surfaces immerse in the solution are allow to equilibrate for 1h. About 100 force-distance curves(10 curves at 10 different spots) to calculate the average force. 5. results and discussion

  21. THANKYOU

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