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Zeolite morphology and catalyst performance: Conversion of methanol to hydrocarbons over offretite

Catalysis Science and Technology, ISSN: 2044-4761, Vol: 7, Issue: 22, Page: 5435-5447
2017
  • 19
    Citations
  • 0
    Usage
  • 44
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    19
    • Citation Indexes
      19
  • Captures
    44

Article Description

The synthesis, characterization and catalytic performance of offretite with four distinct crystal morphologies (oval, hexagonal, broccoli-like, and spherical) are presented. As a member of the ABC-6 family of zeolite structures, offretite is likely to form intergrowths which can affect its shape-selective properties. Herein, a combination of experiments (SC-XRD, PXRD, benzene uptake and the methanol-to-hydrocarbon conversion) allows the determination of the mechanism and fraction of twinning. It is demonstrated that the catalysts with the same crystal aspect ratio (AR = 3) yield product spectra dominated by C-C aliphatics. Such product selectivity is associated with zeolites with an 8-ring channel system. Interestingly, a significant production of bulky aromatics is seen for the catalyst with the spherical morphology (AS = 1.1) which is a manifestation of the 12-ring pore system of the OFF framework topology. This constitutes the first report of this behavior. The particular display of product shape selectivity can be ascribed to the catalyst particle morphology.

Bibliographic Details

Katarzyna Anna Łukaszuk; Daniel Rojo-Gama; Sigurd Øien-ØDegaard; Andrea Lazzarini; Karl Petter Lillerud; Unni Olsbye; Pablo Beato; Lars Fahl Lundegaard; Stian Svelle; Gloria Berlier; Silvia Bordiga

Royal Society of Chemistry (RSC)

Chemical Engineering

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