Photocatalytic NOx abatement: The effect of high air flow velocity
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F22%3A00559887" target="_blank" >RIV/61388955:_____/22:00559887 - isvavai.cz</a>
Alternative codes found
RIV/26763842:_____/22:N0000004
Result on the web
<a href="https://hdl.handle.net/11104/0333014" target="_blank" >https://hdl.handle.net/11104/0333014</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.eti.2022.102820" target="_blank" >10.1016/j.eti.2022.102820</a>
Alternative languages
Result language
angličtina
Original language name
Photocatalytic NOx abatement: The effect of high air flow velocity
Original language description
In the literature, the abatement of nitrogen oxide (NO) emissions by photocatalysis is rarely carried out at real-world air flow velocities. Here, we investigated the performance of two commercial photocatalysts, Aeroxide® TiO 2 P25 (Evonik Industries, Germany) and FN NANO®2 (Advanced Materials-JTJ, Czech Republic), P25 containing 88 % anatase and 12 % rutile, while FN 2 moreover 13 % of a binder. The degradation of NOx pollutants (0.1 and 1.0 ppmv) at air flow velocities ranging from 0.02 to 0.7 m s was tested, the photocatalytic efficiency being determined for various slit heights (5–25 mm) and rate of volume flow (1500–11 000 cm 3 min). The photocatalysts achieved substantial NO and NO abatement. Pollutant conversion decreased as the air flow velocity increased, with the highest conversion (80%) occurring at 0.1 m s. The NO conversions were slightly higher for NO than for NO2, and significantly higher for the NO concentration of 0.1 ppmv. Slit height had a negligible effect, indicating a substantial degree of mixing in the direction perpendicular to the flow. Consequently, the flow cannot be laminar in nature as the ISO standard (22197-1:2016) states. This finding is supported by the nanoindentation technique showing that the surface roughness contributed to the formation of vortexes and enhancement of the mass transport. To our best knowledge, this is the first study to test commercial photocatalysts under such a wide range of air velocities and, in doing so, it has identified considerable implications for outdoor air purification.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10403 - Physical chemistry
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Environmental Technology & Innovation
ISSN
2352-1864
e-ISSN
2352-1864
Volume of the periodical
28
Issue of the periodical within the volume
NOV 2022
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
12
Pages from-to
102820
UT code for WoS article
000891311900016
EID of the result in the Scopus database
2-s2.0-85135537327