Mesoporous zeolite single crystal catalysts: Diffusion and catalysis in hierarchical zeolites

Preparation of porous diatomite-templated carbons with large adsorption capacity and mesoporous zeolite K-H as a byproduct

“…2a). The high N 2 adsorption capacity of C/Dt-KOH at the relative pressure near to zero indicates the existence of abundant micropores [40], which was in good agreement with the TEM result. And the N 2 adsorption capacity of C/Dt-KOH was much higher than that of C/Dt (Fig.…”

Hierarchically Nanoporous Zeolites and Their Heterogeneous Catalysis: Current Status and Future Perspectives

“…The long-range order of micropores in the zeolite crystal can provide the well-known size/shape selective molecular discrimination during adsorption/ separation or catalytic reaction [5,6]. However, such bulky crystalline system can suffer from the diffusion limitation [7,8]. It causes a slow mass transport to and away from the catalytic sites inside the micropores, which can increase the possibility of secondary or undesired side reactions.…”

Multimodal Zr-Silicalite-1 zeolite nanocrystal aggregates with interconnected hierarchically micro-meso-macroporous architecture and enhanced mass transport property

“…However, the reduction in crystal size of zeolites from the micrometer to the nanometer scale leads to the decrease in the crystalline degree, the thermal stability, and substantial changes in the properties. Zeolites with hierarchical porosity are mostly preferred, which can possess a great superiority in practical catalysis applications compared with conventional zeolites featuring only micropores due to their significantly improved accessibility and molecular transport, and higher surface area [14,15]. There have been many successful approaches to hierarchical MFI-type zeolites [16].…”