Crystallization of metastable zeolites has been primarily driven forward by discovery and functionality, leading to synthetic pathways to 200+ frameworks. Dispite such important steps forward, the field still relies heavily on conventional batch inorganic synthesis methods at high pressure in unstirred autoclaves, which hinders production at scale and batch-to-batch reproducibility. Furthermore, from a mechaistsic perpective, it convolutes several complex phenomena: 1) gradients in transport (heat transfer and mass transfer/mixing effects), 2) multiphase mechanics/thermodynamics, including metastable crystal formation, 3) stochastic and competitive nucleation and growth kinetics. These processes are further complicated by dynamic transients in the liquid phase composition with time. Furthermore, many fundamental questions remain about the non-classical crystallization mechanism/pathways.<br/>In this presentation, techniques for using continuous flow chemistry to systematically control the transport and transients in the crystallization process will be explored. An automated reactor system used to access crystallization mechanisms will be discussed and applied to zeolite synthesis.

Continuous synthesis of metastable zeolite crystals

2019 Spring National Meeting

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