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Synthesis and structure of the CDO zeolite precursor with a high Al content

Abstract

A new CDO zeolite precursor (PreCDO) with a Si/Al ratio of 8.7, the lowest among the layered precursors of this channel-based small-pore zeolite reported so far, has been synthesized using tetraethylammonium (TEA+) and tetramethylammonium (TMA+) ions in fluoride media. However, both the elemental analysis and 13C MAS NMR results reveal the presence of TEA+ only in PreCDO, although this layered phase did not crystallize without TMA+ or F- present. The structure of PreCDO solved by a combination of synchrotron X-ray diffraction Rietveld analysis and computational modeling shows that the ferrierite (fer) layers of PreCDO are stacked with an interlayer distance of 2.7 Å. Its calcination led to a condensation along the a-axis, yielding a highly crystalline CDO zeolite.

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Publication details

The article was received on 19 Jun 2018, accepted on 07 Sep 2018 and first published on 07 Sep 2018


Article type: Research Article
DOI: 10.1039/C8QI00576A
Citation: Inorg. Chem. Front., 2018, Accepted Manuscript
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    Synthesis and structure of the CDO zeolite precursor with a high Al content

    S. H. Ahn, S. Seo, H. Lee and S. B. Hong, Inorg. Chem. Front., 2018, Accepted Manuscript , DOI: 10.1039/C8QI00576A

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