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Further studies on how the nature of zeolite cavities that are bounded by small pores influences the conversion of methanol to light olefins

Kang, Jong Hun and Walter, Raimund and Xie, Dan and Davis, Tracy and Chen, Cong-Yan and Davis, Mark E. and Zones, Stacey I. (2018) Further studies on how the nature of zeolite cavities that are bounded by small pores influences the conversion of methanol to light olefins. ChemPhysChem, 19 (4). pp. 412-419. ISSN 1439-4235. doi:10.1002/cphc.201701197.

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A series of small-pore zeolites are synthesized and investigated as catalysts for the methanol-to-olefins (MTO) reaction. Small-pore zeolites SSZ-13, SSZ-16, SSZ-27, SSZ-28, SSZ-52, SSZ-98, SSZ-99, SSZ-104, SSZ-105 and an ITQ-3-type material are synthesized, and the results from their use as catalytic materials in the MTO reaction compared to those obtained from SAPO-34. The production of propane that tends to correlate with catalytic material lifetime (higher initial propane yields lead to shorter lifetimes) declines with increasing Si/Al (as has been observed previously for SSZ-13), and a larger cage dimension leads to higher propane yields at a fixed Si/Al. Data from these materials and others reported previously, for example, SSZ-39 and Rho, that were tested at the same reaction conditions, revealed four different patterns of light olefin selectivities: 1) ethylene greater than propylene with low butene, for example, SSZ-17, SSZ-98, SSZ-105, 2) ethylene equal to propylene and low butene, for example, SAPO-34, SSZ-13, SSZ-16, SSZ-27, SSZ-52, SSZ-99, SSZ-104, 3) propylene greater than ethylene with butene similar to ethylene, for example, SSZ-28, SSZ-39, and 4) ethylene equal to propylene equal to butene, for example, Rho. No clear relationships between zeolite cage architecture and light olefin selectivity emerged from this investigation, although several trends are presented as suggestions for further study.

Item Type:Article
Related URLs:
URLURL TypeDescription
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. Issue online: 19 February 2018; Version of record online: 10 January 2018; Accepted manuscript online: 6 December 2017; Manuscript Revised: 5 December 2017; Manuscript Received: 3 November 2017. Financial support for this work was provided by the Chevron Energy Technology Company. R.W. was a visiting student at Caltech from the Technische Universität München, Lichtenbergstraße 4, D-85747 Garching, Germany, and thanks them for the opportunity to study in Pasadena. His current address is: BMW Group, Knorrstraße 147, 80807 München, Germany. The authors declare no conflict of interest.
Funding AgencyGrant Number
Chevron Energy Technology CompanyUNSPECIFIED
Subject Keywords:small pore catalysis; methanol to olefins; structure-property relationships
Issue or Number:4
Record Number:CaltechAUTHORS:20171208-092058527
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Official Citation:J. H. Kang, R. Walter, D. Xie, T. Davis, C.-Y. Chen, M. E. Davis, S. I. Zones, ChemPhysChem 2018, 19, 412
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:83752
Deposited By: Tony Diaz
Deposited On:12 Dec 2017 17:39
Last Modified:15 Nov 2021 20:13

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