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Chemical and Biochemical Engineering Quarterly, Vol. 38 No. 1, 2024.

Original scientific paper

https://doi.org/10.15255/CABEQ.2022.2154

Synthesis, Characterization, and Application of Nano-sized DD3R Zeolite Powder in Thin DD3R Membrane Synthesis

M. J. Vaezi ; Nanostructure Material Research Center (NMRC), Chemical Engineering Faculty, Sahand University of Technology, P.O.Box 53318-17634, Tabriz, Iran
M. G. Geranbaha ; Nanostructure Material Research Center (NMRC), Chemical Engineering Faculty, Sahand University of Technology, P.O.Box 53318-17634, Tabriz, Iran
S. S. Moghimi ; Nanostructure Material Research Center (NMRC), Chemical Engineering Faculty, Sahand University of Technology, P.O.Box 53318-17634, Tabriz, Iran
A. A. Babaluo ; Nanostructure Material Research Center (NMRC), Chemical Engineering Faculty, Sahand University of Technology, P.O.Box 53318-17634, Tabriz, Iran

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Abstract

DD3R zeolite powder was synthesized within a brief period using tetramethyl orthosilicate through a sonochemical method combined with hydrothermal treatment. The highest crystallinity with average particle size of 47 nm was achieved within five days. This nano-sized powder was used for seeding the surface of a support modified with TiO2-Boehmite, facilitating the synthesis of a thin (less than 5 µm) and uniform DD3R zeolite layer. The resulting membrane exhibited perm-selectivities of N2 and CO2 over CH4
that were 3 and 4 times greater than those reported in literature.
The surface modification of the synthesized layer using a polydimethylsiloxane solution further improved the perm-selectivity of N2/CH4 and CO2/CH4 by up to 12 and 260, respectively. The straightforward synthesis of the initial layer before modification positively influenced the perm-selectivity of N2/CH4, achieving a three-fold increase compared to similar works in the literature.







This work is licensed under a Creative Commons Attribution 4.0 International License.

Keywords

DD3R zeolite powder; sonochemical method; hydrothermal treatment; nano-sized powder; surface modification; perm-selectivity

Hrčak ID:

316515

URI

https://hrcak.srce.hr/316515

Publication date:

29.4.2024.

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