Browsing by Author "Deimund, Mark A."

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    Facile Synthesis and Catalysis of Pure-Silica and Heteroatom LTA
    (American Chemical Society, 2015) Boal, Ben W.; Schmidt, Joel E.; Deimund, Mark A.; Deem, Michael W.; Henling, Lawrence M.; Brand, Stephen K.; Zones, Stacey I.; Davis, Mark E.
    Zeolite A (LTA) has many large-scale uses in separations and ion exchange applications. Because of the high aluminum content and lack of high-temperature stability, applications in catalysis, while highly desired, have been extremely limited. Herein, we report a robust method to prepare pure-silica, aluminosilicate (product Si/Al = 12–42), and titanosilicate LTA in fluoride media using a simple, imidazolium-based organic structure-directing agent. The aluminosilicate material is an active catalyst for the methanol-to-olefins reaction with higher product selectivities to butenes as well as C5 and C6 products than the commercialized silicoalumniophosphate or zeolite analogue that both have the chabazite framework (SAPO-34 and SSZ-13, respectively). The crystal structures of the as-made and calcined pure-silica materials were solved using single-crystal X-ray diffraction, providing information about the occluded organics and fluoride as well as structural information.