Development of high durability plasma filter for air circulating disinfection system

Park, Joo Young; Baek, Ki Ho; Kim, Sang-jin; Choi, Joon‐Hwan; Yoon, Hyunkyung; Park, Hunkwan; Kim, Giyeong; Lee, Seunghun

doi:10.1016/j.cap.2022.06.017

Cited by 6 publications

(2 citation statements)

References 32 publications

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“…In terms of energy efficiency, our setup obtains almost identical inactivation results at only a quarter of the energy requirement. However, it is well established that gram-negative species are more susceptible to NTP than grampositive species, which might explain this observation [28,30].…”

Section: Antibacterial Efficacymentioning

confidence: 99%

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Non-thermal plasma for decontamination of bacteria trapped in particulate matter filters: plasma source characteristics and antibacterial potential

Helmke,

Curril,

Mrotzek

et al. 2024

J. Phys. D: Appl. Phys.

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The aims of this study encompass the characterization of process parameters and the antimicrobial potential during operation of a novel non-thermal plasma (NTP) source in a duct system containing a particulate matter (PM) filter thus mimicking the interior of an air purifier. Simulating conditions of a long-term operation scenario, in which bacterial aerosols in indoor environments accumulate on PM filters, the filter surfaces were artificially inoculated with Escherichia coli (E. coli) and exposed to an air stream enriched with reactive species. Electrical power consumption, key plasma parameters, volume flow and air flow velocity, reactive gas species concentrations as well as inactivation rates of E. coli were assessed. The NTP operated at a gas temperature close to ambient air temperature and featured a mean electron energy of 9.2 eV and an electron density of 1∙1019 m-3. Ozone was found to be the dominating reactive gas species with concentrations of approx. 10 ppm in close vicinity to the PM filters. An inactivation rate of 99.96 % could be observed after exposure of the PM filters to the gas stream for 15 min. This inactivation efficiency appears very competitive in combating realistic bacterial aerosol concentrations in indoor environments.

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Section: Antibacterial Efficacymentioning

confidence: 99%

“…Park et al proposed a packed-bed reactor comprising dielectric beads in combination with a HEPA filter and an ozone catalyst installed in some cm distance downstream the reactor for disinfection of circulating air [28]. They observed a reduction of 98.35% after 20 min operation for E. coli and 70.69% for M. luteus, respectively.…”

Section: Antibacterial Efficacymentioning

confidence: 99%