In the chemical composition of zeolites the formula is written with alumina Al2O3 and silica SiO2 while in the synthesis sodium aluminate NaAlO2 and sodium silicate Na2SiO3 are used.
Dear Sellam Mohamed, please see our published article:
"High purity oxygen production by pressure vacuum swing adsorption using natural zeolite"
Ali F. Al-Shawabkeh, Nijad Al-Najdawi, Abdullah N. Olimat
Results in Engineering 18 (2023) 101119
journal homepage: www.sciencedirect.com/journal/results-in-engineering
https://doi.org/10.1016/j.rineng.2023.101119
Best Regards
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