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Conversion of Methanol to Alkenes over Medium- and Large-Pore Acidic Zeolites: Steric Manipulation of the Reaction Intermediates Governs the Ethene/Propene Product Selectivity
Open accessAbstract
High Resolution Image Download MS PowerPoint Slide Methanol conversion over H-beta and H-ZSM-5 zeolite catalysts is compared at identical reaction conditions (temperature = 350 °C, WHSV = 7.0 gg -1 h -1 ), and it is found that H-ZSM-5 yields seven times more ethene relative to propene than H-beta yields. By switching from a 12 C methanol feed to 13 C methanol, the transient incorporation of 13 C atoms from methanol into the gas-phase products and reaction intermediates located within the zeolite voids is followed. For H-beta, penta- and hexamethylbenzene are involved in a hydrocarbon-pool-type mechanism, leading predominantly to propene and the higher alkenes, whereas for H-ZSM-5, the lower methylbenzenes are the intermediates and represent the only route for ethene formation. This work outlines how the zeolite topology determines the type of intermediate participating in the catalytic cycle, thereby controlling the ethene/propene product selectivity in the methanol to olefins reaction.
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Citations
Cited by
Selective production of propylene from methanol: Mesoporosity development in high silica HZSM-5
MEI, C., WEN, P., LIU, Z., LIU, H., WANG, Y., YANG, W., XIE, Z., HUA, W., & GAO, Z. (2008) · Journal of Catalysis · doi:10.1016/j.jcat.2008.06.019 · Cited by 366
Structure–deactivation relationship for ZSM-5 catalysts governed by framework defects
Barbera, K., Bonino, F., Bordiga, S., Janssens, T. V. W., & Beato, P. (2011) · Journal of Catalysis · doi:10.1016/j.jcat.2011.03.016 · Cited by 335
Unraveling the Reaction Mechanisms Governing Methanol‐to‐Olefins Catalysis by Theory and Experiment
Hemelsoet, K., Van der Mynsbrugge, J., De Wispelaere, K., Waroquier, M., & Van Speybroeck, V. (2013) · ChemPhysChem · doi:10.1002/cphc.201201023 · Cited by 270
Zheng, M., & Bukowski, B. C. (2024) · The Journal of Physical Chemistry C · doi:10.1021/acs.jpcc.4c01087 · Cited by 18
Metadata
- Authors
- Svelle, S., Olsbye, U., Joensen, F., & Bjørgen, M.
- Venue
- The Journal of Physical Chemistry C
- Publisher
- American Chemical Society (ACS)
- Published
- 2007-11-08
- Volume
- 111
- Issue
- 49
- Pages
- 17981-17984
- ISSN
- 1932-7447 (ISSN-L)
- 1932-7455
- OpenAlex
- W1994092123
- Cited by
- 198
- References
- 0
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Svelle, S., Olsbye, U., Joensen, F., & Bjørgen, M. (2007). Conversion of Methanol to Alkenes over Medium- and Large-Pore Acidic Zeolites: Steric Manipulation of the Reaction Intermediates Governs the Ethene/Propene Product Selectivity. The Journal of Physical Chemistry C. https://doi.org/10.1021/jp077331j
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