Penentuan Situs Asam Bronsted-Lewis dari ZSM-5 yang Disintesis Menggunakan Silika Amorphous dari Fly Ash Sawit
Abstract
Fly ash is one of the byproducts of palm oil mill. The silica extracted from fly ash can be utilized for the synthesis of ZSM-5 by hydrothermal methods after fusion pre-treatment with NaOH. This study aimed to obtain ZSM-5 and determine the characteristic of the synthesized ZSM-5. The synthesis was performed at various composition molar ratio of SiO2/Al2O3 with addition of PEG-400 as template on temperature 100°C during hydrothermal process. The analysis using XRD showed that the two of three synthesized zeolites were ZSM-5 with crystallinity 67.63% and 28.53%. Analysis using FTIR spectroscopy on synthesized ZSM-5 detected many groups including T-OH hydroxyl groups (Si-OH/Al-OH), TO groups (O-Si-O/O-Al-O) and pentasil groups are typical of ZSM-5. From analysis using pyridine adsorption, it can be concluded that the increases ratio of SiO2/Al2O3 causes the number total acid side of the sample increased.
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