One-pot catalyst preparation: combined detemplating and Fe ion-exchange of BEA through Fenton's chemistry

Abstract

One-pot catalyst preparation Melián-Cabrera, I.; Kapteijn, F.; Moulijn, J.A.

Oxidation Tools in the Synthesis of Catalysts and Related Functional Materials

“…• shifting the complexation equilibria for ion-exchange by oxidation of the organic chelates [146]; • one-pot synthesis of metal-exchanged zeolites [147];…”

“…We discuss here a combined process including detemplation and Fe incorporation by ion-exchange in the zeolite framework [147]. To achieve this, oxidants to decompose the organic template and Fe-cations for exchange are needed.…”

“…The approach consists of a liquid-phase oxidation using OH • Fenton radicals from H 2 O 2 for detemplation [148][149][150]. The radicals oxidize the organic template into CO 2 and H 2 O while the porosity of the material is developed.…”

“…The proof-of-principle of this concept is discussed for two case studies. [191] Platinum-catalyzed template removal [192] Low-temperature plasma [193] and ozone treatment [194] Destructive protocols II: chemical detemplation under relatively mild conditions Detemplation during the crystallization [70] Ozone in liquid phase [195] and UV-vis-assisted room temperature ozone [196] UV-vis irradiation [197] Digestion under microwaves [198] KMnO 4 combined with H 2 SO 4 [199] Diluted hydrogen peroxide oxidation [200] HNO 3 /H 2 O 2 treatments [201] Fenton chemistry [148][149][150] The first case study. Beta zeolite is the basis for many industrial applications due to its specific pore structure.…”

Synthesis, characterization and catalytic performance of a novel zeolite ITQ-2-like by treating MCM-22 precursor with H2O2

“…Recently, it is reported that the detemplation of zeolite beta could be achieved by oxidation of the template using H 2 O 2 (Melián-Cabrera et al 2005). With this approach, the original structure of the material was well preserved and no extra-framework aluminum was formed.…”