CONFERENCIAS ITQ: “Ultrafast Continuous Flow Synthesis of Crystalline Microporous Materials” y “Bead-Milling […]”

CONFERENCIAS ITQ: “Ultrafast Continuous Flow Synthesis of Crystalline Microporous Materials” y “Bead-Milling and Post-Milling Recrystallization: A New Methodology for the Production of Nano-sized Zeolite”
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Hoy jueves 28 de septiembre, a partir de las 12:00h, en el Salón de Actos del ITQ habrá un programa doble de conferencias por parte del Prof. Toru Wakihara del Department of Chemical System Engineering de la Universidad de Tokyo.

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Resúmenes:

* Ultrafast Continuous Flow Synthesis of Crystalline Microporous Materials

Crystalline microporous materials such as zeolites and zeotype have played important roles in several industries; thus, making the development of efficient synthesis routes is of high significance. The fast synthesis of crystalline microporous materials remains a huge challenge due to long synthesis period required for crystallization. Meanwhile, hydrothermal synthesis conducted in a batch reactor also suffers from drawbacks such as low energy efficiency as well as time-consuming start-up and shut-down operations. In this lecture, ultrafast routes to continuously synthesize several zeolites will be presented. By combining the addition of seed with fast heating, MFI and CHA type zeolites can be synthesized using a continuous flow reactor (plug flow reactor (PFR) rather than CSTR) in second order to one minute. In addition, the continuously synthesized CHA can be recycled as seeds, which further improves the overall efficiency of production. This easily designed, efficient route will result in remarkable cost and energy savings and thus has great potential for the industrial-level production of crystalline microporous materials in the future.

 

* Bead-Milling and Post-Milling Recrystallization: A New Methodology for the Production of Nano-sized Zeolite

A new method for the production of nanosized zeolite powder by a top-down approach has been performed. In this study, zeolite powder was first milled to produce a nanopowder. This technique can destroy the outer portion of the zeolite framework, which lowers the micropore volume of zeolite. To remedy this, the damaged part was recrystallized using a dilute aluminosilicate solution after bead milling. From the combined bead milling and post-milling recrystallization, nanosized zeolite approximately 50 nm in size with high crystallinity was obtained successfully.