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Filtration

Filtration

Filtration is a physical separation process that involves passing a suspension through a porous medium to separate solids from fluids. During filtration, solids collect on the porous medium while liquids, also collectively known as the filtrate, pass through. The filtration medium is selected based on the filtration purpose, quantity, and nature of the precipitate. The general criteria for a suitable filtering medium are that it is inert, mechanically strong, nonabsorbent toward dissolved...

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Glass Wool Filters for Concentrating Waterborne Viruses and Agricultural Zoonotic Pathogens

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Published on: March 3, 2012

Long-lifetime water-washable ceramic catalyst filter for air purification.

Hyuk Jae Kwon¹, Dong Sik Yang², Min Seok Koo²

¹Air Science Research Center (ASRC), Samsung Advanced Institute of Technology (SAIT), Samsung Electronics Co., Ltd., 130 Samsung-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do, 16678, Republic of Korea. hj13.kwon@samsung.com.

Nature Communications

|February 15, 2023

Summary

New ceramic catalyst filters (CCFs) offer a sustainable solution for air purification, effectively removing particulate matter (PM) and volatile organic compounds (VOCs). These regenerable filters provide long-term use and zero-waste generation.

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Area of Science:

Environmental Science
Materials Science
Chemical Engineering

Background:

Particulate matter (PM) and volatile organic compounds (VOCs) are significant air pollutants.
Conventional disposable filters generate waste and require frequent replacement.
There is a need for robust, regenerable filters for efficient air purification.

Purpose of the Study:

To develop and evaluate novel, water-washable ceramic catalyst filters (CCFs) for simultaneous PM and VOC removal.
To assess the performance, capacity, and reusability of the developed CCFs.
To demonstrate the potential of CCFs for sustainable, long-term air purification.

Main Methods:

Fabrication of CCFs by coating inner and outer channels with an inorganic membrane and a Cu2O/TiO2 photocatalyst.
Testing CCF performance for simultaneous removal of PM (>95%) and VOCs (>82%).
Evaluating dust loading capacity and regeneration capability through water washing over multiple cycles.

Main Results:

CCFs achieved >95% PM and >82% VOC removal in a single pass.
Maximum dust loading capacity was four times higher than conventional filters (20 g/L vs 5 g/L).
CCFs maintained performance after ten regeneration cycles via water washing.

Conclusions:

Developed CCFs offer a highly efficient and regenerable solution for air purification.
CCFs demonstrate superior dust loading capacity and longevity (20 years) compared to conventional filters.
The CCFs represent a sustainable, zero-waste technology for indoor and outdoor air purification.