Solvent/OSDA-free interzeolite transformation of FAU into CHA zeolite with quantitative yield

Phase‐Controlled Synthesis of Zeolites from Sodium Aluminosilicate under OSDA/Solvent‐Free Conditions

“…Generally, it is important to prepare the starting materials with highly dispersed Si, Al and Na species in zeolite synthesis. [26] Then, we determined the Si/Al ratio of milled materials using XRF measurements. The Si/Al ratios of milled materials increased with an increase of starting Si/Al ratios as listed in Table S1.…”

“…Recently, we have developed both OSDA/solvent‐free synthesis method using mechanochemical and steam treatments [25–27] . As a simple description, the starting materials were milled using a ball mill.…”

“…MFI type zeolite is synthesized from the starting materials containing seed crystals in the absence of both solvent and OSDA [25] . Furthermore, CHA type zeolite can be transformed from FAU type zeolite by this synthesis method [26] . In addition, we have successfully synthesized various zeolites from unseeded aluminosilicates by mechanochemical and steam treatments without solvent and OSDA [27] .…”

New avenues for mechanochemistry in zeolite science

“…The necessary amount of water for transformation of ball milled precursors into a zeolite can for example be supplied as steam, showcased with amorphous reagents and in the absence of an OSDA 59 as well as in an inter-zeolite transformation of FAU into CHA. 60 Microwave radiation has been used as energy source for crystallisation of AlPO 4 -5 (AFI), where direct comparison of manual grinding with ball milling showed higher phase purity using the latter method. 61 Access to heteroatom zeolites via mechanochemistry Altering zeolite materials to better accommodate the needs for specific applications has led researchers to include hetero-Fig.…”

Interzeolite conversion of a micronsized FAU to a nanosized CHA zeolite free of organic structure directing agent with a high CO2capacity

“…[23][24][25][26][27] Another way to obtain the CHA zeolite is through interzeolite transformation where only inorganic structure directing agents are used. 13,[28][29][30][31] CHA obtained by an interzeolite transformation of faujasite (FAU) has been reported, however, only limited research has been dedicated on the effect of the starting material on the size and morphology of the nal CHA crystals.…”