Ceramic foams with TiO2 -CeO2 , TiO2 -CuO and TiO2 -CeO2 -CuO catalysts in oxidation of model volatile organic compounds

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27710%2F22%3A10250979" target="_blank" >RIV/61989100:27710/22:10250979 - isvavai.cz</a>

Výsledek na webu

<a href="https://pannonian2020.umcs.eu/" target="_blank" >https://pannonian2020.umcs.eu/</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Ceramic foams with TiO2 -CeO2 , TiO2 -CuO and TiO2 -CeO2 -CuO catalysts in oxidation of model volatile organic compounds

Popis výsledku v původním jazyce

Dichloromethane and methanol are among the widely used solvents in the pharmaceutical industry, the production of synthetic polymer precursors or in analytical practice. Used, at the output of technological operations, represent a significant amount of hazardous and toxic liquid waste that must be disposed ecologically. Economically and ecologically acceptable way of their disposal is their catalytic oxidation.The work deals with the study of monolithic catalysts based on TiO2-CeO2-CuO [1, 2], TiO2-CeO2 and TiO2-CuO fixed on ceramic Vakupor foams in oxidation of dichloromethane and methanol. Oxide mixtures were prepared by sol-gel method and deposited on foams by dip-coating and calcination. Catalytic experiments were carried out on a laboratory apparatus consisting of a flow-through tube reactor with a fixed catalyst bed located in the furnace, equipped with a by-passport, injection of dichloromethane (500 ppm) and water (1.5 vol.%) or methanol (500 ppm) and an online FTIR analyzer. The activity and selectivity of monolithic catalysts in oxidation of dichloromethane were studied in the temperature range of 100MINUS SIGN 500oC, in oxidation of methanol at 45MINUS SIGN 500oC, at the SV of 11 300 h-1. The durability of the best monolithic catalyst was studied as well.The catalysts studied are suitable for oxidation of methanol, not for oxidation of dichloromethane. In methanol oxidation, TiO2-CeO2-CuO and TiO2-CuO catalysts showed the highest and comparable catalytic activity and selectivity. In oxidation of dichloromethane, the highest activity and selectivity to HCl was shown by the TiO2-CeO2 catalyst, which, however, showed low selectivity to CO2.

Název v anglickém jazyce

Ceramic foams with TiO2 -CeO2 , TiO2 -CuO and TiO2 -CeO2 -CuO catalysts in oxidation of model volatile organic compounds

Popis výsledku anglicky

Dichloromethane and methanol are among the widely used solvents in the pharmaceutical industry, the production of synthetic polymer precursors or in analytical practice. Used, at the output of technological operations, represent a significant amount of hazardous and toxic liquid waste that must be disposed ecologically. Economically and ecologically acceptable way of their disposal is their catalytic oxidation.The work deals with the study of monolithic catalysts based on TiO2-CeO2-CuO [1, 2], TiO2-CeO2 and TiO2-CuO fixed on ceramic Vakupor foams in oxidation of dichloromethane and methanol. Oxide mixtures were prepared by sol-gel method and deposited on foams by dip-coating and calcination. Catalytic experiments were carried out on a laboratory apparatus consisting of a flow-through tube reactor with a fixed catalyst bed located in the furnace, equipped with a by-passport, injection of dichloromethane (500 ppm) and water (1.5 vol.%) or methanol (500 ppm) and an online FTIR analyzer. The activity and selectivity of monolithic catalysts in oxidation of dichloromethane were studied in the temperature range of 100MINUS SIGN 500oC, in oxidation of methanol at 45MINUS SIGN 500oC, at the SV of 11 300 h-1. The durability of the best monolithic catalyst was studied as well.The catalysts studied are suitable for oxidation of methanol, not for oxidation of dichloromethane. In methanol oxidation, TiO2-CeO2-CuO and TiO2-CuO catalysts showed the highest and comparable catalytic activity and selectivity. In oxidation of dichloromethane, the highest activity and selectivity to HCl was shown by the TiO2-CeO2 catalyst, which, however, showed low selectivity to CO2.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

20700 - Environmental engineering

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

2022

Kód důvěrnosti údajů

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