Naslov
Simultaneous oxidation of aromatic compounds using Sr-doped lanthanum manganites as catalysts

Autori
Žužić, Andreja ; Car, Filip ; Macan, Jelena ; Tomašić, Vesna ; Gajović, Andreja

Izvornik
International journal of applied ceramic technology (1546-542X) 19 (2022), 5; 2891-2904

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
autocombustion synthesis ; catalytic oxidation ; coprecipitation ; doped lanthanum manganites ; volatile organic compounds

Sažetak
Strontium-doped lanthanum manganites, La1-xSrxMnO3 (LSMO), are promising and affordable catalysts for oxidative degradation of volatile organic compounds. LSMO catalysts (x = 0, .1, .2, and .3) were prepared by the citrate-nitrate autocombustion (CNA) and coprecipitation synthesis. The phase composition was confirmed by X- ray diffraction and Rietveld refinement analysis, while the oxygen content was determined by Mohr’s salt permanganate titration. Morphology and porosity of prepared catalysts was correlated to catalytic oxidation of benzene, toluene, ethylbenzene and o-xylene. It was observed that both synthesis methods yielded catalysts of similar average pore size diameter and specific surface area, but the pore size distribution differed: CNA-prepared catalysts had a multimodal pore size distribution, while the coprecipitated ones had a single maximum at 4 nm. Catalysts prepared by the CNA method have shown a higher catalytic activity in the temperature range 373– 723 K, as the presence of Mn3+/Mn4+ mixed valences increased their reducibility.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

POVEZANOST RADA