Naslov
Photocatalytic oxidation of NOx on TiO2 supported on glass fiber mesh under artificial solar irradiation

Autori
Tomaš, Marija ; Radetić, Benjamin ; Benjak, Paula ; Grčić, Ivana

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Book of abstracts PTIM 2021 / Lodeiro, Carlos ; Capelo-Martinez, Jose Luis , Santos, Hugo M. ; Oliveira, Elisabete - Caparica : PROTEOMASS Scientific Society (Portugal), 2021, 153-153

ISBN
978-989-54822-9-0

Skup
4th International Caparica Conference on Pollutant Toxic Ions and Molecules (PTIM 2021)

Mjesto i datum
Caparica, Portugal, 31.10.2021. - 04.11.2021

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Podatak o recenziji nije dostupan

Ključne riječi
Photocatalysis ; Titanium dioxide (TiO2) ; nitrogen oxides (NOx) ; Photocatalytic tubular reactors

Sažetak
Photocatalysis has been widely researched during the last five decades as a promising method for air purification[1]. In urban areas, increased emissions of nitrogen oxides (NOx) caused by industrial and traffic activities, have been impacting on environmental and health issues, such as production of tropospheric ozone, acid rains, global warming and human diseases relevant to respiratory and immune systems[2]. In an advanced oxidation process, reactive species formed in synergy of solar irradiation, photocatalyst (semiconductor) and moisture are degrading air contaminants. In this paper, degradation of environmentally relevant concentrations of NOx in tubular laboratory reactors are presented. Preliminary experiments were performed in an annular reactor (AR) and compound parabolic collector reactor (CPC) under simulated solar irradiation with different portions of UV light. As a photocatalyst, titanium dioxide (TiO2 P25) was used and immobilized on a glass fibers by sol-gel method[3] prepared from commercially available materials. The aim of the experiments was to remove NOx from the air stream which were represented by nitrogen dioxide (NO2), nitrogen oxide (NO) and nitrous oxide (N20). The kinetic study resulted with intrinsic reaction rate constants calculated using axial dispersion model including mass transfer considerations and first- order reaction rate kinetics with photon absorption effects The results confirmed photocatalytic oxidation of nitrogen oxides towards molecular nitrogen (N2) with different reactor’s aspects, a photocatalyst’s surface, mass transfer and irradiation usage. Therefore, the preliminary results obtained in this work represent a good basis for sizing reactors on semi-pilot and pilot level to prevent further environmental pollution.

Izvorni jezik
Hrvatski

Znanstvena područja
Interdisciplinarne tehničke znanosti

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