Fluoride-free synthesis of high-silica CHA-type aluminosilicates by seed-assisted aging treatment for starting gel
Ryota Osuga, Mizuho Yabushita, Takeshi Matsumoto, Masato Sawada, Toshiyuki Yokoi, Kiyoshi Kanie, Atsushi Muramatsu
Abstract
High-silica CHA-type aluminosilicates (Si/Al molar ratio >100) were synthesized hydrothermally in the absence of fluoride media, where the seed-assisted aging treatment played an important role on the crystallization. These aluminosilicates showed a long catalytic lifetime with high selectivity toward lower olefins in the methanol-to-olefins reaction.
Topics & Concepts
AluminosilicateFluorideChemical engineeringChemistryInorganic chemistryOrganic chemistryCatalysisEngineeringZeolite Catalysis and SynthesisMesoporous Materials and CatalysisGlass properties and applications