Al-ZSM-5 Nanocrystal Catalysts Grown from Silicalite-1 Seeds for Methane Conversion

This study evaluated Al-ZSM-5 nanocrystals grown from silicalite-1 seed crystals as catalysts for the methane dehydroaromatization (MDA) reaction. Silicalite-1 sized between 30 and 40 nm were used to grow under various synthesis conditions. The size of was significantly affected by Si/Al ratio (SAR), time, silica nutrients/seed crystal (NSR). Larger obtained with an increased SAR in sols. Gradual growth occurred although ceased at 5 h 120 °C, indicating rapid aided seeds. Precise tuning possible changing nutrient/silicalite-1 ratio; a higher NSR led larger crystals. Two representative SARs 35 140 prepared catalyst testing, sizes tailored <100 controlling NSR. MDA reaction conducted presence Al-ZSM-5. exhibited distinct differences stability, while did not produce noticeable changes stability commercial zeolites this system.