New avenues for mechanochemistry in zeolite science

Abstract

Zeolites are a class of microporous materials with tremendous value for large scale industrial applications such as catalysis, ion exchange, or gas separation. In addition to naturally ocurring variants, zeolites...

Effects of kaolinite layer expansion and impurities on the solid-state reaction of kaolinite

“…The solid-state reaction of kaolinite involves metakaolinite. 3 Although metakaolinite generally does not produce XRD diffraction lines because it has an amorphous layered structure, we recently succeeded in the formation of orderly stacked metakaolinite and revealed the destruction of the ordered structure upon manual grinding. 26 Thus, before grinding and calcination of such raw materials, it would be beneficial to assess the effects of pre-heating kaolinite to form metakaolinite with various stacking orders.…”

Advances in the synthesis and application of the SSZ-39 zeolite

“…Zeolites with well-defined micropores have been widely employed in the fields of chemicals and energy due to their large microporous volume, high surface area, and good stability. [1][2][3][4] For example, the ZSM-5 zeolite has been widely used in the process of shape-selective catalysis, and the Y zeolite is very efficient in the process of fluid catalytic cracking. [5][6][7][8] In the past few decades, great attention has also been paid to small-pore zeolites with 8-membered rings (8MRs) because they show excellent catalytic performances in the methanol-to-olefin (MTO) and selective catalytic reduction of NO x with NH 3 (NH 3 -SCR) reactions.…”

Fluoride-free synthesis of beta zeolite with enrichment of polymorph B from a solvent-free route

“…Zeolites with well-defined micropores have been widely employed in fields of catalysis, ion-exchange, adsorption, and separation due to their high surface area, large pore volume, and excellent stabilities. 1–15 Currently, there are over 250 zeolites confirmed by the Structure Commission of the International Zeolite Association. 16 Among them, about 20 zeolites have been used for practical applications, and one of the most important zeolites is beta zeolite.…”