Study on synthesis conditions of high quality γ-Al2O3 from sodium aluminate source of Alumina NhanCo for application as catalyst support
https://doi.org/10.62239/jca.2025.024
Abstract
γ-Al2O3 (gama aluminium oxide) was synthesized from sodium aluminate (NaAlO2) source of Alumina NhanCo, VietNam. Research on the conditions for synthesizing g-Al2O3 from this raw material source, with the purpose of application as an acidic support, suitable for catalytic synthesis processes for cracking, isomerization, alkylation reactions, etc. The results showed that, from NaAlO2 synthesized into boehmite with reaction conditions of temperature 80 ÷ 90℃, pH = 8 ÷ 9, aging time for 2 hours and calcination at 230℃ for 5 hours favored the phase transformation from phases such as gibbsite, bayerite to boehmite. Boehmite transformed into γ-Al2O3 has complete crystalline phases confirmed by XRD, with BET surface area of 304 m2/g, pore diameter is mainly distributed in regions 36 and 57Å, with three acid centers of different strengths determined by TPD NH3. Suitable as a catalyst support with good acidity.
