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Related Concept Videos

Magnetic Damping01:17

Magnetic Damping

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Eddy currents can produce significant drag on motion, called magnetic damping. For instance, when a metallic pendulum bob swings between the poles of a strong magnet, significant drag acts on the bob as it enters and leaves the field, quickly damping the motion.
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Adhesion01:14

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Adhesion occurs when one type of molecule is attracted to a different molecule. Water exhibits adhesive properties in the presence of polar surfaces, such as glass or cellulose in plants. For instance, when water is poured into a glass, the positively charged hydrogen molecules of water are more attracted to the negatively charged oxygen molecules in the silica than to the oxygen in neighboring water molecules.
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The high insolubility of some precipitates can result in an unfavorable relative supersaturation. This can lead to colloidal particles with a large surface-to-mass ratio, where adsorption is promoted. For instance, in the precipitation of silver chloride, silver ions are adsorbed on the surface of the colloidal particles, forming a primary layer. This layer attracts ions of opposite charge (such as nitrate ions), forming a diffuse secondary layer of adsorbed ions. This electric double layer...
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Fabrication of Superhydrophobic Metal Surfaces for Anti-Icing Applications
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Preventing Hydrate Adhesion with Magnetic Slippery Surfaces.

Thevaruban Ragunathan1, Xingguang Xu2, Juhairi Aris Shuhili1

  • 1Petroleum Engineering Department, Universiti Teknologi PETRONAS, Seri Iskandar 32610, Perak, Malaysia.

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|October 9, 2019
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Summary

This study introduces a magnetic slippery surface to combat hydrate formation in oil and gas transport. The novel coating significantly reduces hydrate adhesion, offering a promising solution for cold-condition operations.

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Area of Science:

  • Petroleum Engineering
  • Materials Science
  • Chemical Engineering

Background:

  • Hydrate formation poses significant challenges in oil and gas transportation, particularly under cold conditions.
  • Existing coating solutions face limitations due to solid-liquid interfaces promoting hydrate nucleation and adhesion.
  • Developing effective anti-adhesion strategies is crucial for operational efficiency and safety.

Purpose of the Study:

  • To evaluate the efficacy of a magnetic slippery surface in preventing hydrate adhesion.
  • To demonstrate the potential of magnetic fluid coatings as hydrate inhibitors.
  • To assess performance under both static and dynamic (fluid flow) conditions.

Main Methods:

  • A hydrocarbon-based magnetic fluid was applied to a metal surface to create a magnetic slippery interface.
  • Tetrahydrofuran (THF) hydrates were used as a model system at atmospheric pressure.
  • Hydrate adhesion strength was quantified by measuring the reduction in torque after hydrate formation under static and dynamic flow.

Main Results:

  • The magnetic slippery surface demonstrated a notable reduction in hydrate adhesion strength.
  • The coating effectively lowered the torque value, indicating decreased hydrate adhesion.
  • Performance was validated under both static and dynamic fluid flow conditions.

Conclusions:

  • Magnetic slippery surfaces show significant potential as a novel approach to mitigate hydrate adhesion.
  • The magnetic coating gel can act as an effective inhibitor for hydrate adhesion in oil and gas applications.
  • This proof-of-concept study opens avenues for developing advanced anti-adhesion technologies for subsea and cold-weather operations.