Future of nano-/hierarchical zeolites in catalysis: gaseous phase or liquid phase system

Abstract

Nano-/hierarchical zeolites have received increasing attention due to their catalytic performance preferable to that of conventional zeolites. The two major textural features of nano-/hierarchical zeolites, i.e. short microporous channel and large external surface area, can provide them with high activity and lifetime as well as high selectivity for products during catalysis. This perspective focuses on the most representative behavior of nano-/hierarchical zeolites in gaseous phase and liquid phase catalytic systems, considering whether the reaction is predominantly catalyzed within the micropore or at the external surface, and whether it is shape-selective. The catalytic characteristics and future prospects of nano-/hierarchical zeolites are highlighted in their applications in gaseous and liquid phase reactions.