Zeolite minilith: A unique structured catalyst for the methanol to gasoline process

Toyin Omojola, Nikolay Cherkasov, Evgeny Rebrov, Dmitry Lukyanov, Semali Perera

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6 Citations (Scopus)
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Abstract

Structured microchannel H-ZSM-5 catalysts containing up to 80 wt% zeolite (balance bentonite) were fabricated by unit operations of paste preparation, extrusion, drying and firing. The structured catalysts, called miniliths due to their micrometre-range dimensions, were composed of parallel cylindrical channels with a wall thickness of 200 – 300 μm, density of 2.1 channels/mm2 and a channel diameter of 300 μm. These miniliths were characterised by X-ray diffraction, scanning electron microscopy, energy dispersive X-ray analysis, N2 physisorption and thermogravimetric analysis. For the first time, these miniliths were tested for the conversion of methanol to gasoline at 370 °C, 3 bar and a weight hourly space velocity (WHSV) of up to 1170 h-1. A gasoline product yield of 53% was obtained at a methanol conversion of 74% over the ZSM-5 miniliths. The pressure drop at the same conversion over a packed-bed reactor of equal ZSM-5 content was 2 orders of magnitude higher than that of the minilith. Reducing the amount of ZSM-5 catalyst in the packed bed, to obtain similar inlet pressure as the ZSM-5 minilith gave the same product yield at a much higher conversion (81%) demonstrating the potential of these structured microchannel reactors.
Original languageEnglish
Article number131
Pages (from-to)137-143
Number of pages7
JournalChemical Engineering & Processing: Process Intensification
Volume131
Early online date26 Jul 2018
DOIs
Publication statusPublished - Sep 2018

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Keywords

  • Gasoline
  • Methanol
  • Methanol-to-gasoline
  • Methanol-to-olefin
  • Micromonolith
  • Minilith
  • Structured reactor
  • ZSM-5

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Energy Engineering and Power Technology
  • Industrial and Manufacturing Engineering

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