Naslov
Mechanochemical approach in zero waste synthesis of geopolymer-zeolite composite

Autori
Rukavina, Marko ; Bafti, Arijeta ; Mandić, Vilko

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

Izvornik
1st ACDC 2023 BOOK of ABSTRACTS / - , 2023, 38-38

Skup
1st International Conference of the Croatian Ceramic Society (CroCerS): Advanced Ceramics in Derivative Configurations (1st ACDC 2023)

Mjesto i datum
Dubrovnik, Hrvatska, 26.04.2023. - 29.04.2023

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
mechanochemistry ; kaolin ; zero waste ; zeolite

Sažetak
Kaolinite is a 1:1 clay mineral with the chemical formula Al2O3·2SiO2·2H2O that has a dioctahedral layer structure without charge. Each layer consists of one tetrahedral layer of silicon dioxide and one octahedral layer of aluminum oxide. The high proportion of SiO2 and Al2O3 makes kaolinite an excellent source of aluminosilicates, which is why it is one of the most commonly used natural precursors in the synthesis of geopolymers and zeolites. However, highly ordered crystalline systems are more resistant to alkaline attack than amorphous systems. Therefore, kaolin as a crystalline precursor is often used in its amorphous form - metakaolin, which requires temperature treatment, usually in the range between 600 and 800 °C. In recent years, mechanochemistry has begun to be studied as an alternative to the high-temperature processing (calcining) of kaolin into metakaolin. Due to the reduction of solvent consumption, energy, and faster chemical reactions, mechanochemistry is considered a greener approach in the synthesis of aluminosilicate materials such as geopolymers and zeolites. In this work, the possibility of mechanochemical synthesis of geopolymer-zeolite composite was investigated. The composite synthesis parameters were approximately set to a molar ratio of 1 mol Na2O: 1 mol Al2O3: 2.5 mol SiO2, while the amount of water and the curing temperature of the samples varied. The obtained samples were characterised by XRD, SEM, and ATR- FTIR analysis.

Izvorni jezik
Engleski

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

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