Self-templating synthesis of hollow spheres of zeolite ZSM-5 from spray-dried aluminosilicate precursor

Synthesis of hollow spheres consisting of ZSM-5 zeolite crystals, prepared by a cost- and time-saving self-templating process, requires neither a hard/soft template for sphere formation nor tetraalkylammonium compound as a zeolite structure-directing agent. A preshaped aluminosilicate precursor, obt...

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Bibliographic Details
Published in:Microporous and mesoporous materials 2016-07, Vol.228, p.59-63
Main Authors: Pashkova, Veronika, Tokarova, Venceslava, Brabec, Libor, Dedecek, Jiri
Format: Article
Language:English
Subjects:
MFI
Template free synthesis
Zeolite shells
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Summary:Synthesis of hollow spheres consisting of ZSM-5 zeolite crystals, prepared by a cost- and time-saving self-templating process, requires neither a hard/soft template for sphere formation nor tetraalkylammonium compound as a zeolite structure-directing agent. A preshaped aluminosilicate precursor, obtained by spray drying of a mixture of colloidal solution of silicic acid and aluminum butoxide, plays the role of a shape-directing agent for the formation of spheres, and is used as a source of silica and alumina for zeolite growth. The zeolite structure is directed using ZSM-5 seeds. This method yielded highly stable hollow spheres with diameters of 15–25 μm, consisting of inter-grown ZSM-5 crystals (Si/Al 14) with a size of 0.5–2.0 μm. [Display omitted] •Highly stable hollow spheres consisting of ZSM-5 zeolite were prepared.•Self-templating process applying preshaped aluminosilicate precursor.•Hollow spheres preparation without templating agent for spheres formation.•Time- and cost-saving synthesis of zeolite hollow spheres.
ISSN:1387-1811
1873-3093
DOI:10.1016/j.micromeso.2016.03.021