Emerging Strategies for Zeolite Membrane, Adsorbent, and Catalyst Synthesis
Johns Hopkins University
Most commercial nanoporous materials are based on zeolites, which have reached high technological maturity. With the paradigm shifts in energy, fuels, and chemicals production driven by urgent needs for decarbonization and sustainability, new membranes, adsorbents and catalysts may be needed for key roles in product purification, in feedstock fractionation, and for intensified chemical conversions and separations. In the last 20 years, research efforts on nanoporous materials like zeolites, metal organic frameworks (MOFs), graphenes/graphene oxides, and other 2D materials, provided demonstrations of breakthrough performance exceeding that of currently available technologies. Selected important synthesis concepts that allowed these developments (e.g., nanoparticle/nanosheet assembly, solvent-free crystallization, nanocomposites, epitaxial growth, post-synthesis modifications) will be reviewed. Efforts to control composition, crystal morphology, and the presence of intergrowths in zeolites towards making zeolite nanosheets and nanoparticles as well as hierarchical meso/micoporous zeolites will be presented along with their emerging applications.