Hierarchical Sn-MFI zeolites prepared by facile top-down methods for sugar isomerisation

Hierarchical Sn-MFI zeolites prepared by facile top-down methods for sugar isomerisation

A top-down methodology for ultrafast tuning of nanosized zeolites.

We herein present a top-down methodology to prepare nanosized zeolites with tunable size by combining post-synthesis milling and fast recrystallization of several minutes (10 min for SSZ-13 and 5 min for AlPO4-5). A continuous-flow recrystallization process is demonstrated to further enhance the overall product efficiency.

Hierarchical whitespace allocation in top-down placement

Increased transistor density in modern commercial ICs typically originates in new manufacturing and defect prevention technologies [15], [16]. Additionally, better utilization of such low-level transistor density may result from improved software that makes fewer assumptions about physical layout in order to reliably automate the design process. In particular, recent layouts tend to have large ...

Hierarchical Whitespace Allocation in Top - Down Placement

Increased transistor density in modern commercial ICs typically originates in new manufacturing and defect prevention technologies [15], [16]. Additionally, better utilization of such low-level transistor density may result from improved software that makes fewer assumptions about physical layout in order to reliably automate the design process. In particular, recent layouts tend to have large ...

H NMR Signal Broadening in Spectra of MFI Type Zeolites

1. Introduction Isotropic mobility of molecules adsorbed in zeolites should completely average out spin interactions which cause line broadening in nuclear magnetic resonance (NMR) spectroscopy. But it is well-known that additional application of magic-angle spinning (MAS), Hahn-Echo (HE) or Carr-Purcell (CPMG) pulse sequences reduces the effective line broadening in such systems. This is essen...