Journal
JOURNAL OF CATALYSIS
Volume 405, Issue -, Pages 601-605Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2021.11.006
Keywords
Zeolite; Silicon tetrachloride; Silicogermanate; Bifunctional catalysis
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Funding
- Flemish government
- European Research Council (ERC) [834134]
- Flemish government, department EWI [AH.2016.134, I001321N]
- European Research Council (ERC) [834134] Funding Source: European Research Council (ERC)
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This study successfully transformed the unstable silicogermanate into a stable aluminosilicogermanate using post-synthetic isomorphic substitution. The resulting material showed promising performance in the catalytic transformation of bulky molecules, suggesting potential applications for stable derivatives of silicogermanate zeolites.
Owing to their extra-large pores compared to traditional aluminosilicate zeolites, silicogermanates could be attractive for the catalytic transformation of bulky molecules, provided the frameworks can be mod-ified to incorporate acid sites and can be stabilized to survive calcination. Post-synthetic isomorphic sub-stitution of Ge by Si and Al would present a route to achieve this goal. This report describes the transformation and characterization of the non-stable IM-12 silicogermanate into a new stable IZM-7 aluminosilicogermanate by partially substituting Ge by Si in gaseous form to stabilize the material, followed by an aqueous alumination step. IZM-7-based catalyst presents promising performance in the hydroconversion of n-decane compared to conventional zeolites, opening perspectives for the catalytic use of stable derivatives of silicogermanate zeolites. (C) 2021 Elsevier Inc. All rights reserved.
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