An approach to increase the acid site accessibility, mass transport and thus catalyst utilization in microporous three-dimensional (3D) zeolites is to slice them into nearly unit-cell thick two-dimensional (2D) structures, in which the acid sites are exposed directly on the external surface or caged within a single-micropore distance from the surface. In the catalytic processes, the bulky molecules can react over the acid sites on the external surface (external surface acid sites) or at the pore mouth regions (i.e., pore mouth acid sites formed with Al atom below the external surface) of 2D zeolites, which offer more space than those deeper inside the intracrystalline micropores of 3D zeolites. This presentation will introduce our recent efforts on development of 2D zeolite hierarchical structures and understanding of their acidity in acid catalysis applications. In particular, we employed one-step dual-templates method to create 2D zeolite architectures. By employment of organic base titrations, we were able to identify the locations of acid sites in these structures. The modification of the 2D zeolite surface and acidity has been tried to derive diversified properties. Finally, the catalysis application of these structures were tested in several different reactions.

Diversification of hierarchical two-dimensional zeolite structures for catalysis applications

255th National Meeting (2018)

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