Advanced oxidation processes for elimination of xylene from waste gases

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27710%2F21%3A10245977" target="_blank" >RIV/61989100:27710/21:10245977 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S1010603020308443?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1010603020308443?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jphotochem.2020.113047" target="_blank" >10.1016/j.jphotochem.2020.113047</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Advanced oxidation processes for elimination of xylene from waste gases

Popis výsledku v původním jazyce

The elimination of xylene was experimentally studied using advanced oxidation process in a two-step pilot plant photochemical unit with the use of UV irradiation combined with ozone (first step) and with hydrogen peroxide solution (second step). The influence of the initial xylene concentration and air flow rate was investigated. A mathematical model of the first step of the unit applying UV/O3 treatment was developed. Xylene conversion decreased with increasing its initial concentration and increasing flow rate of the air (lowering residence time in the unit). The highest xylene conversion (95 %) was achieved with the initial concentration 50 ppmv and the flow rate 57 m3. hMINUS SIGN 1. Based on the model results for the first photolytic step of the pilot plant unit, the main pathway of the elimination of xylene is its reaction with hydroxyl radicals which are formed both by the reaction of ozone with water/humidity but also by the reaction of singlet oxygen (formed by the decomposition of ozone) with water/humidity. Calculated figures-of-merit showed that the pilot plant unit is more energy-cost-efficient for the higher flow rates of the waste gas. The technology using advanced oxidation processes seems promising for the elimination of organic compounds from the air, although further studies are necessary. (C) 2020 Elsevier B.V.

Název v anglickém jazyce

Advanced oxidation processes for elimination of xylene from waste gases

Popis výsledku anglicky

The elimination of xylene was experimentally studied using advanced oxidation process in a two-step pilot plant photochemical unit with the use of UV irradiation combined with ozone (first step) and with hydrogen peroxide solution (second step). The influence of the initial xylene concentration and air flow rate was investigated. A mathematical model of the first step of the unit applying UV/O3 treatment was developed. Xylene conversion decreased with increasing its initial concentration and increasing flow rate of the air (lowering residence time in the unit). The highest xylene conversion (95 %) was achieved with the initial concentration 50 ppmv and the flow rate 57 m3. hMINUS SIGN 1. Based on the model results for the first photolytic step of the pilot plant unit, the main pathway of the elimination of xylene is its reaction with hydroxyl radicals which are formed both by the reaction of ozone with water/humidity but also by the reaction of singlet oxygen (formed by the decomposition of ozone) with water/humidity. Calculated figures-of-merit showed that the pilot plant unit is more energy-cost-efficient for the higher flow rates of the waste gas. The technology using advanced oxidation processes seems promising for the elimination of organic compounds from the air, although further studies are necessary. (C) 2020 Elsevier B.V.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10400 - Chemical sciences

Projekt

<a href="/cs/project/EF17_049%2F0008419" target="_blank" >EF17_049/0008419: Podpora mezisektorové spolupráce v oblasti snižování polutantů v životním prostředí a využití odpadů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Photochemistry and Photobiology A: Chemistry

ISSN

1010-6030

e-ISSN

—

Svazek periodika

407

Číslo periodika v rámci svazku

15 February 2021

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

9

Strana od-do

—

Kód UT WoS článku

000607218400006

EID výsledku v databázi Scopus

2-s2.0-85097751355