Naslov
Mechanochemical approach for the synthesis of LTA and SOD zeolites from (meta)kaolin

Autori
Rukavina, Marko ; Bafti, Arijeta ; Janković-Miloš, Lucija ; Ljubičić, Ines ; Tomić, Andrea ; Mandić, Vilko

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

Izvornik
28th Croatian Meeting of Chemist & Chemical Engineers / Rogošić, Marko - Zagreb : Hrvatsko društvo kemijskih inženjera i tehnologa (HDKI), 2023, 208-208

Skup
28th Croatian Meeting of Chemists & Chemical Engineers

Mjesto i datum
Rovinj, Hrvatska, 28.03.2023. - 31.03.2023

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Mehanokemija ; Kaolin ; LTA ; SOD
(Mechanochemistry : Kaolin ; LTA ; SOD)

Sažetak
Due to its high aluminosilicate content, purity, and pozzolanic properties, metakaolin is one of the most commonly used precursors in the synthesis of zeolites. It is obtained by dehydroxylation of the kaolinite structure in the temperature range from 450 to 800 °C. [1] Compared to the common thermal activation of kaolinite, mechanochemical activation is considered as an environmentally friendly alternative for the activation of kaolinite clay avoiding the high-temperature dehydroxylation process. Mechanochemical activation (MCA) is a process that can induce structural disorder – amorphization, through intensive grinding, which increases the chemical reactivity of the processed aluminosilicate material. Also, by using the MCA approach in the synthesis of zeolites, the energy-demanding hydrothermal conditions can be avoided, which is in line with the principles of green chemistry. In this work, the obtained samples were subjected to broad structural, spectroscopic, and morphological characterization. The parameters for zeolite synthesis were set to a molar ratio of 1 mol Na2O: 1 mol Al2O3: 2 mol SiO2. The amount of water and the temperature for curing the samples were varied. The possibility of MCA of kaolin was investigated by monitoring the degree of dehydroxylation, i.e. the degree of amorphization, as a parameter to monitor the success of conversion of kaolin-into-metakaolin. X-ray diffraction was used to study the degree of amorphization as a function of grinding time. [2] Finally, the study of the proposed mechanochemical activation showed that this route is a viable green approach alternative for the synthesis of zeolites. [3]

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Interdisciplinarne prirodne znanosti, Kemijsko inženjerstvo, Temeljne tehničke znanosti, Interdisciplinarne tehničke znanosti

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