Nano zeolite has advantages of large external surface area, short diffusion path and less coke formation over micron-sized zeolites. With these improved properties, nano zeolite has applications in synthesis of structured zeolite materials (membrane, film), optical and chemical sensing, catalysis and biomedical targeting.<br/>Synthesis of nonaggregated nano zeolite requires clear-solution synthesis method, which needs large amount of organic structure directing agent, low alkali cation content and low crystallization temperature. Several studies have reported successful synthesis of nanozeolite Y, but long crystallization time of 4-5 days and low yield are limiting its industrialization.<br/>In this study, supernatant obtained after hydrothermal synthesis has been used as the reactant. After regular clear solution synthesis, large amount of unreacted nuclei still remains in the supernatant. With microwave heating, 9% yield of nanozeolite particle is achieved in 1 hour. By recycling the supernatant, total yield reaches 70% after 8 batches. However, as recycling time goes more than 6 batches, large particles of dense zeolite framework, like LTA, SOD, start to form.

Methods for rapid synthesis of nonaggregated nanozeolite Y

249th National Meeting (2015)

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