Capturing Ultrasmall EMT Zeolite from Template-Free Systems

• DOI: 10.1126/science.1214798
• Publication Date: 2011-12-09T05:54:42Z
• Authors: Eng-Poh Ng; Daniel Chateigner; Thomas Bein; Valentin Valtchev; Svetlana Mintova
• Keywords: Template; Nanometre; Fluid catalytic cracking

Controlling Zeolite Nucleation Small zeolite crystals are of increasing interest as catalysts and for membrane separations because they allow the high selectivity their cages to be exploited while minimizing kinetic limitations caused by diffusion. Ng et al. (p. 70 , published online 8 December) synthesized ultrasmall (6 15 nanometers) EMT zeolite, which has a low framework density good catalytic properties hydrocarbon “cracking” (conversion large smaller ones). The synthesis normally required expensive organic templates that limit its industrial use. Careful control conditions, such ratios reactants short bursts microwave heating, allowed small nucleate avoid formation zeolites with closely related structures.