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Methanol-to-Olefins Catalysis with Hydrothermally Treated Zeolite SSZ-39

Dusselier, Michiel and Deimund, Mark A. and Schmidt, Joel E. and Davis, Mark E. (2015) Methanol-to-Olefins Catalysis with Hydrothermally Treated Zeolite SSZ-39. ACS Catalysis, 5 (10). pp. 6078-6085. ISSN 2155-5435. doi:10.1021/acscatal.5b01577. https://resolver.caltech.edu/CaltechAUTHORS:20150928-091254944

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Abstract

Zeolite SSZ-39 is evaluated for catalyzing the methanol-to-olefins (MTO) reaction. By steaming NH_4–SSZ-39, Al can be removed from framework positions, resulting in an increase in framework-Si/AlT and thus a lowered active acid site density. The Si/Al_T ratios can be controlled by the steaming temperatures. SSZ-39 steamed at 750 °C, with preserved pore volume and morphology, is an excellent MTO catalyst, as high, stable olefin selectivities, long time-on-stream activity, and low alkane production are observed. Moreover, interesting propylene/ethylene/butylene ratios of 2.8/1/1.1 are obtained, likely related to the shape of the AEI cage. By Cu^(2+)-exchanging SSZ-39, evidence is provided to show that Al_T sites in close proximity (high AlT density) produce the unwanted effects (higher alkane-make and carbonaceous deposits) in nonsteamed materials during MTO.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1021/acscatal.5b01577DOIArticle
http://pubs.acs.org/doi/10.1021/acscatal.5b01577PublisherArticle
http://pubs.acs.org/doi/suppl/10.1021/acscatal.5b01577PublisherSupporting Information
ORCID:
AuthorORCID
Dusselier, Michiel0000-0002-3074-2318
Davis, Mark E.0000-0001-8294-1477
Additional Information:© 2015 American Chemical Society. ACS AuthorChoice - This is an open access article published under an ACS AuthorChoice License, which permits copying and redistribution of the article or any adaptations for non-commercial purposes. Received: July 23, 2015; Revised: September 8, 2015; Publication Date (Web): September 17, 2015. M.D. acknowledges Research Foundation − Flanders, Belgium (FWO) for his postdoctoral funding and the Belgian American Educational Foundation (honorary fellow, boat of 2014). M.A.D. thanks The Dow Chemical Company for financial support. J.E.S. would like to thank the NDSEG for their support through a fellowship. PQ Corporation is thanked for providing us with sodium silicate and SACHEM inc. is thanked for providing the OSDAs.
Funders:
Funding AgencyGrant Number
Fonds Wetenschappelijk Onderzoek - Vlaanderen (FWO)UNSPECIFIED
Belgian American Educational FoundationUNSPECIFIED
Dow Chemical CompanyUNSPECIFIED
National Defense Science and Engineering Graduate (NDSEG) FellowshipUNSPECIFIED
Subject Keywords:zeolite, SSZ-39, methanol-to-olefins, heterogeneous catalysis, steaming, AEI
Issue or Number:10
DOI:10.1021/acscatal.5b01577
Record Number:CaltechAUTHORS:20150928-091254944
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20150928-091254944
Official Citation:Methanol-to-Olefins Catalysis with Hydrothermally Treated Zeolite SSZ-39 Michiel Dusselier, Mark A. Deimund, Joel E. Schmidt, and Mark E. Davis ACS Catalysis 2015 5 (10), 6078-6085 DOI: 10.1021/acscatal.5b01577
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:60564
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:29 Sep 2015 03:12
Last Modified:10 Nov 2021 22:35

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