Naslov
DIESEL SOOT OXIDATION KINETICS OF Mn-DOPED CERIA NANOPARTICLES

Autori
Munda, Ivana Katarina ; Terzin, Andrej ; Kurajica, Stanislav

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

Izvornik
International Conference 18. Ružička Days, Book of Abstracts / Jukić, Ante - Zagreb : Hrvatsko društvo kemijskih inženjera i tehnologa (HDKI), 2020, 81-81

ISBN
978-953-6894-75-8

Skup
18. Ružičkini dani "Danas znanost - sutra industrija"

Mjesto i datum
Vukovar, Hrvatska, 16.09.2020. - 18.09.2020

Vrsta sudjelovanja
Poster

Vrsta recenzije
Domaća recenzija

Ključne riječi
oxidation, soot, ceria, doping

Sažetak
Due to incomplete combustion of fuel, diesel engines produce soot particles which are harmful to human health and pollute the environment. In order to reduce soot emission from vehicles a Diesel Particulate Filter (DPF) is utilized. In order to be capable of passive regeneration DPF should contain appropriate catalysts enabling soot oxidation at low temperature. For this purpose nanosized ceria (CeO2), can be used. In order to enhance its catalytic properties, ceria is often doped with various elements. It was shown that the incorporation of manganese atoms in the ceria crystal lattice can improve its catalytic properties such as oxygen storage and oxygen mobility, as well as its thermal stability. Therefore, Mn-doped ceria catalysts, Ce1-xMnxO2, where x = 0 ; 0.1 ; 0.2 and 0.3 were prepared by hydrothermal synthesis followed by thermal treatment. The structural, textural and morphological properties were investigated by X-Ray diffraction (XRD), BrunauerEmmett-Teller model (BET) and transition electron microscopy (TEM). Catalytic soot oxidation activity as well as kinetics in the presence of catalysts was analyzed by thermogravimetric analysis. It was established that Ce1-xMnxO2 solid solutions with nanosized particles are formed, the increase of SSA with the amount of manganese was also noted. Flynn-Wall-Ozawa and Kissinger-Akahira- Sunose kinetic models were used to determine the activation energy of prepared catalysts. Results show that with the increase of manganese ions in the prepared solid solutions, soot oxidation process rate increases while the activation energy decreases. Since these types of catalysts would require less energy for regeneration, hydrothermally-derived, Mn-doped ceria have great potential for utilization in superior DPF fabrication.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Kemijsko inženjerstvo, Temeljne tehničke znanosti

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