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Zeolite Synthesis Using Degradable Structure-Directing Agents and Pore-Filling Agents

Lee, Hyunjoo and Zones, Stacey I. and Davis, Mark E. (2005) Zeolite Synthesis Using Degradable Structure-Directing Agents and Pore-Filling Agents. Journal of Physical Chemistry B, 109 (6). pp. 2187-2191. ISSN 1520-6106. doi:10.1021/jp048908p.

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Zeolites and molecular sieves are synthesized using organic structure-directing agents (SDAs) that have the potential to be degraded into fragments within the pore space so that they can be readily extracted at mild conditions. The zeolites and molecular sieves, VPI-8, ZSM-12, and ZSM-5, are synthesized using the ketal-containing SDA, 8,8-dimethyl-1,4-dioxa-8-azoniaspiro[4,5]decane (SDA-1). As expected, solids with unidimensional pore systems (VPI-8, ZSM-12) are much more difficult to process by this methodology than solids containing multidimensional pore systems (ZSM-5). Pore-filling agents (PFAs) such as isobutylamine and cyclopentylamine are used together with the ketal-containing SDA-1 to prepare ZSM-5. Extraction of the PFA is shown to be feasible, and its removal provides space for components to enter the zeolite micropores where they react with and cleave SDA-1. Removal of the cleavage fragments from SDA-1 gives ZSM-5 that has the appropriate pore volume, framework aluminum (measured by ^(27)Al NMR), and catalytic behavior. Reasons for desiring this new type of zeolite synthesis method are enumerated.

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Davis, Mark E.0000-0001-8294-1477
Additional Information:© 2005 American Chemical Society. Received 11 March 2004. Published online 8 June 2004. Published in print 1 February 2005. This work was supported by the Chevron Texaco Energy and Research Center.
Funding AgencyGrant Number
Chevron Texaco Energy and Research CenterUNSPECIFIED
Issue or Number:6
Record Number:CaltechAUTHORS:20170605-071527798
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Official Citation:Zeolite Synthesis Using Degradable Structure-Directing Agents and Pore-Filling Agents Hyunjoo Lee, Stacey I. Zones, and Mark E. Davis The Journal of Physical Chemistry B 2005 109 (6), 2187-2191 DOI: 10.1021/jp048908p
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:77933
Deposited By: Ruth Sustaita
Deposited On:06 Jun 2017 19:10
Last Modified:15 Nov 2021 17:35

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