Testiranje aktivnosti keramičkih monolitnih katalizatora za katalitičku oksidaciju BTEX spojeva

master's thesis

• Title (english): Testing the activity of ceramic monolithic catalysts for the catalytic oxidation of BTEX compounds
• Author: Monika Suknaić
• Mentor: Vesna Tomašić (mentor)
• Committee member: Vesna Tomašić (predsjednik povjerenstva)
• Committee member: Filip Car (član povjerenstva)
• Committee member: Domagoj Vrsaljko (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2024-09-30, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering

Abstract

Cilj ovog rada bio je ispitati učinkovitost različitih monolitnih katalizatora za katalitičku oksidaciju smjese aromatskih hlapljivih organskih BTEX spojeva. U BTEX spojeve ubrajaju se benzen, toluen, etilbenzen i ksilen. BTEX spojevi pripadaju hlapljivim organskim spojevima (VOCs) koji vrlo lako dospijevaju u okoliš i imaju štetan učinak na zdravlje ljudi zbog svojih toksičnih i kancerogenih svojstava. Katalitička oksidacija jedna je od dostupnih i često upotrebljavanih metoda za smanjenje koncentracije hlapljivih organskih spojeva. Nosači na koje su se nanosile katalitički aktivne komponente izrađeni su tehnikama aditivne proizvodnje, odnosno tehnikama proizvodnje rastaljenim filamentom i stereolitografije
(3D ispisani nosači). Za usporedbu korišteni su i komercijalni kordijeritni nosači izrađeni tehnikom ekstruzije. Kao katalitički aktivne komponente upotrijebljeni su miješani metalni oksidi mangana i željeza (MnFeOx), mangana i cinka (MnZnOx), mangana i bakra (MnCuOx), mangana i kroma (MnCrOx), mangana i kobalta (MnCoOx) te mangana i cinka (MnZnOx). Katalitička oksidacija provedena je u monolitnom reaktoru u uvjetima atmosferskog tlaka, u širokom rasponu temperature te uuz konstantan volumni protok reaktanata i zraka
(92 cm^3 min^-1). Za kriterij usporedbe učinkovitosti monolitnih katalizatora korištene su vrijednosti T10, T50 i T90 (°C) koje odgovaraju temperaturama za postizanje 10 %-tne,
50 %-tne i 90 %-tne konverzije BTEX spojeva. Na temelju usporedbe vrijednosti T10, T50 i T90 (°C) kordijeritnih nosača istih geometrijskih površina (29 cm^2) s nanesenim različitim katalitički aktivnim komponentama, uočeno je da je najučinkovitiji katalizator kordijeritni nosač s nanesenim MnFeOx kao katalitičkim slojem. Usporedbom vrijednosti T10, T50 i T90 (°C) za 3D ispisane monolitne nosače s nanesenim katalitičkim slojem MnFeOx zaključuje se da je najveća učinkovitost postignuta uz ZDP-FFF nosač, pri čemu je bila potrebna najniža vrijednost temperatura za postizanje 90 %-tne konverzije benzena.

Abstract (english)

Testing the activity of ceramic monolithic catalysts for the catalytic oxidation of BTEX compounds The aim of this work was to examine the effectiveness of different monolithic catalysts for the catalytic oxidation of a mixture of aromatic volatile organic BTEX compounds. BTEX compounds include benzene, toluene, ethylbenzene and xylene. BTEX compounds belong to volatile organic compounds (VOCs) that easily reach the environment and have a harmful effect on human health due to their toxic and carcinogenic properties. Catalytic oxidation is one of the available and frequently used methods for reducing the concentration of volatile organic compounds. The carriers on which the catalytically active components were applied were made using additive manufacturing techniques, i.e. molten filament production techniques and stereolithography (3D printed carriers). For comparison, commercial cordierite supports made using the extrusion technique were also used. Mixed metal oxides of manganese and iron (MnFeOx), manganese and zinc (MnZnOx), manganese and copper (MnCuOx), manganese and chromium (MnCrOx), manganese and cobalt (MnCoOx) and manganese and zinc (MnZnOx) were used as catalytically active components. Catalytic oxidation was carried out in a monolithic reactor under conditions of atmospheric pressure, in a wide temperature range and with a constant volume flow of reactants and air (92 cm^3 min^-1). The T10, T50 and T90 values (°C) corresponding to the temperatures for achieving 10%, 50% and 90% conversion of BTEX compounds were used as a criterion for comparing the effectiveness of monolithic catalysts. Based on the comparison of the T10, T50 and T90 values (°C) of cordierite supports with the same geometric surfaces (29 cm^2) with different catalytically active components applied, it was observed that the most effective catalyst is the cordierite support with applied MnFeOx as a catalytic layer. By comparing T10, T50 and T90 values (°C) for 3D printed monolithic supports with a deposited MnFeOx catalytic layer, it is concluded that the highest efficiency was achieved with the ZDP-FFF support, while the lowest temperature value was required to achieve 90% benzene conversion.

• Keywords: aditivna proizvodnja; hlapljivi organski spojevi (VOCs); benzen; toluen; etilbenzen; o-ksilen (BTEX); monolitni katalizator; katalitička oksidacija
• Keywords (english): additive manufacturing; volatile organic compounds (VOCs); benzene; toluene; ethylbenzene; o-xylene (BTEX); monolithic catalyst; catalytic oxidation
• Language: croatian
• URN:NBN: urn:nbn:hr:149:081742
• Study programme: Title: Chemical Engineering - Graduate study; Study programme type: university; Study level: graduate; Academic / professional title: sveučilišni/a magistar/magistra inženjer/inženjerka kemijskog inženjerstva (sveučilišni/a magistar/magistra inženjer/inženjerka kemijskog inženjerstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2024-11-11 09:54:34