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Related Concept Videos

Air-entraining Agents01:27

Air-entraining Agents

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Air-entraining agents improve the durability and workability of concrete in climates with frequent freezing and thawing. These agents prevent cracks by introducing small air bubbles into the mix, creating spaces accommodating water expansion when temperatures drop. The air-entraining agents lower the surface tension of water, forming stable, small air bubbles. This method is more effective than having accidental large voids, as the intentional, smaller, and evenly distributed air voids improve...
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Lubricant-Impregnated Surfaces for Mitigating Asphaltene Deposition.

Henri-Louis Girard1, Philippe Bourrianne1, Mohsen Yeganeh2

  • 1Department of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02119, United States.

ACS Applied Materials & Interfaces
|June 10, 2020
PubMed
Summary

Liquid-impregnated surfaces (LIS) prevent heavy crude oil asphaltene buildup in pipes. This innovative approach uses a stable lubricant layer to protect surfaces, reducing clogging and costly cleaning operations.

Keywords:
adsorptionanti-foulingasphalteneslubricant impregnated surfacesslippery surfaces

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Area of Science:

  • Petroleum Engineering
  • Materials Science
  • Surface Chemistry

Background:

  • Asphaltenes, complex aromatic compounds in crude oil, readily adhere to surfaces.
  • Asphaltene deposition in pipes causes significant operational issues, including clogging and production downtime.
  • Current solutions often involve costly mechanical cleaning or bulk additives with downstream removal challenges.

Purpose of the Study:

  • To demonstrate the efficacy of liquid-impregnated surfaces (LIS) in preventing asphaltene deposition.
  • To explore the benefits of LIS, such as tunable interfacial properties and inherent surface protection.
  • To develop a cost-effective and sustainable method for mitigating asphaltene-related problems in oil production.

Main Methods:

  • Selection and thermodynamic stability confirmation of a suitable fluorinated lubricant.
  • Fabrication of textured and functionalized solid substrates.
  • Application of LIS to industrial materials (e.g., aluminum) and testing under simulated pipe flow conditions (shear flow).

Main Results:

  • Asphaltene adsorption was successfully prevented over extended periods using the developed LIS.
  • The liquid interface of LIS provided a stable, minimal lubricating layer, protecting the solid substrate.
  • The LIS system demonstrated effectiveness on representative industrial materials under shear stress.

Conclusions:

  • Liquid-impregnated surfaces offer a promising solution for preventing asphaltene deposition in oil production.
  • LIS technology provides a dynamic, defect-free surface with tunable properties, overcoming limitations of traditional methods.
  • This approach reduces operational costs and eliminates the need for downstream additive removal, enhancing process efficiency.