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CIT-9: a fault-free, gmelinite zeolite

Dusselier, Michiel and Kang, Jong Hun and Xie, Dan and Davis, Mark E. (2017) CIT-9: a fault-free, gmelinite zeolite. Angewandte Chemie International Edition, 56 (43). pp. 13475-13478. ISSN 1433-7851. doi:10.1002/anie.201707452.

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A synthetic, fault-free gmelinite (GME) zeolite is prepared using a specific organic structure-directing agent (OSDA), cis-3,5-dimethylpiperidinium. The cis-isomers align in the main 12-membered ring (MR) channel of GME. Trans-isomer OSDA leads to the small-pore zeolite SSZ-39 with the OSDA in its cages. Data from N_2-physisorption and rotation electron diffraction provide evidence for the openness of the 12 MR channel in the GME 12×8×8 pore architecture and the absence of stacking faults, respectively. CIT-9 is hydrothermally stable when K^+-exchanged, while in the absence of exchange, the material transforms into an aluminous AFI-zeolite. The process of this phase-change was followed by in situ variable temperature powder X-ray diffraction. CIT-9 has the highest Si/Al ratio reported for GME, and along with its good porosity, opens the possibility of using GME in a variety of applications including catalysis.

Item Type:Article
Related URLs:
URLURL TypeDescription
Dusselier, Michiel0000-0002-3074-2318
Kang, Jong Hun0000-0002-4197-9070
Xie, Dan0000-0003-2467-976X
Davis, Mark E.0000-0001-8294-1477
Additional Information:© 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim. Manuscript received: July 21, 2017; Revised manuscript received: August 25, 2017; Accepted manuscript online: August 30, 2017; Version of record online: September 21, 2017. M.D. thanks the Research Foundation - Flanders (FWO) and BOFZAP for funding. SACHEM Inc. and PQ Corporation are thanked for providing the piperidinium OSDA and sodium silicate, respectively. Tom Rea and Maryam Deldar are thanked for RED and variable temperature PXRD respectively. Most of the work performed at Caltech was supported by Chevron Energy Technology Company. Dr. Stacey Zones is thanked for insightful discussions. The authors declare no conflict of interest.
Funding AgencyGrant Number
Fonds Wetenschappelijk Onderzoek - Vlaanderen (FWO)UNSPECIFIED
Chevron Energy Technology CompanyUNSPECIFIED
Subject Keywords:AFI zeolite; gmelinite; organic structure-directing agents; rotation electron diffraction; zeolites
Issue or Number:43
Record Number:CaltechAUTHORS:20170831-132157296
Persistent URL:
Official Citation:M. Dusselier, J. H. Kang, D. Xie, M. E. Davis, Angew. Chem. Int. Ed. 2017, 56, 13475
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:81020
Deposited By: Tony Diaz
Deposited On:31 Aug 2017 20:30
Last Modified:15 Nov 2021 19:40

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