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Related Experiment Videos

Filtration application from recycled expanded polystyrene.

C Shin1

  • 1Samsung SDI Co. Ltd., 575, Shin-dong, Yeongtong-gu, Suwon-si, Gyeonggi-do, 443-391, Republic of Korea. cg.shin@samsung.com

Journal of Colloid and Interface Science
|June 20, 2006
PubMed
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Separating small water droplets in oil emulsions is challenging. Adding polystyrene nanofibers to glass fiber filters significantly improves water removal efficiency with only a minor increase in pressure drop.

Area of Science:

  • Chemical Engineering
  • Materials Science
  • Environmental Science

Background:

  • Separating fine water-in-oil emulsions (droplet size < 100 µm) is difficult using conventional methods.
  • Coalescence filtration is an economical and effective technique for separating dispersions, with performance influenced by flow rate, bed depth, fiber properties, and droplet size.
  • Increased fiber surface area directly correlates with improved filtration efficiency.

Purpose of the Study:

  • To investigate the efficacy of incorporating electro-spun polystyrene (PS) nanofibers into glass fiber filter media for enhanced water-in-oil emulsion separation.
  • To evaluate the impact of these modified filter media on separation efficiency and pressure drop.
  • To identify an optimal composition for improved filtration performance.

Main Methods:

Related Experiment Videos

  • Recycled expanded polystyrene (EPS) was electro-spun into sub-micron PS fibers.
  • These PS nanofibers were mixed with conventional micro glass fibers to create modified filter media.
  • The modified filter media were tested for their performance in separating water droplets from water-in-oil emulsions.

Main Results:

  • The addition of PS nanofibers to glass fiber filter media demonstrably improved the separation efficiency for water droplets.
  • An increase in pressure drop was observed with the addition of nanofibers.
  • An optimal performance was achieved with approximately 4% by mass of 500 nm diameter PS nanofibers, balancing significant efficiency gains with minimal pressure drop increase.

Conclusions:

  • Incorporating PS nanofibers into glass fiber filters is a viable strategy to enhance water-in-oil emulsion separation.
  • The study identified an optimal percentage of nanofibers for maximizing filtration efficiency while managing pressure drop.
  • This approach offers a promising method for improving industrial emulsion separation processes.