Influences of aliphatic alcohols on crystallization of large mordenite crystals and their sorption properties

Abstract

The influences of aliphatic alcohols (ROH) on the synthesis of mordenite (MOR) type zeolite were investigated using a starting synthesis mixture with the chemical compositions (0–3 ROH∶0.035 Na₂O∶0.005–0.01 Al₂O₃∶SiO₂∶40 H₂O). Highly crystalline single crystals of MOR were successfully synthesized using ethanol, 1-propanol and 1-butanol. Under well-optimized conditions, pure uniform and large single crystals up to ca. 50 μm in length were obtained. From sorption experiments of nitrogen, water, benzene and Se, it was found that the single large MOR obtained is not the large-port type MOR and that the effective sorption capacity is markedly influenced by the carbon chain length of aliphatic alcohol used in the crystallization.