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  • Hedlund, JonasLuleå tekniska universitet,Kemiteknik,Luleå University of Technology, Sweden (author)

Controlling diffusion resistance, selectivity and deactivation of ZSM-5 catalysts by crystal thickness and defects

  • Article/chapterEnglish2022

Publisher, publication year, extent ...

  • Elsevier,2022
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:ltu-90477
  • https://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-90477URI
  • https://doi.org/10.1016/j.jcat.2022.04.013DOI
  • https://urn.kb.se/resolve?urn=urn:nbn:se:ri:diva-59216URI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • Validerad;2022;Nivå 2;2022-06-01 (hanlid)
  • Funding details: Vetenskapsrådet, VR, 2014-04585_VR; Funding details: Energimyndigheten, P41164-1; Funding text 1: Financial support from the Swedish Research Council (2014-04585_VR) and Bio4energy are acknowledged. Swedish Energy Agency is acknowledged by financing part of the work (O. Öhrman) through grant ID P41164-1.
  • A systematic investigation of two sets of defect free and defective ZSM-5 crystals with controlled thickness (T) between 30 and 400 nm and of their performances in methanol conversion was reported for the first time in the present work. The defect free ZSM-5 crystals with a thickness of 35 nm are by far the smallest ever reported and displayed superior activity, stability and selectivity to slower diffusing compounds, which resulted in high yield of e.g. gasoline and the 1,2,4-trimethylbenzene isomer with high octane number, as compared to the other studied catalysts. Almost only products forming in the zeolite pores were detected and consequently, the external surface must be nearly inactive. Strong correlations between T and deactivation rate were observed. Thick crystals deactivated much faster than thin crystals, probably due to formation of carbon species in the zeolite pores, which results in pronounced percolation effects and faster deactivation of the former. At comparable thickness, crystals with defects deactivated much faster than defect free crystals, due to formation of additional small molecular coke species in the former. Strong correlations between T and selectivity were also observed and assigned to control of diffusion resistance by crystal thickness.

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Added entries (persons, corporate bodies, meetings, titles ...)

  • Zhou, MingLuleå tekniska universitet,Kemiteknik,Luleå University of Technology, Sweden(Swepub:ltu)minsho (author)
  • Faisal, AbrarLuleå tekniska universitet,Kemiteknik,Luleå University of Technology, Sweden(Swepub:ltu)abrfai (author)
  • Öhrman, Olov G.W.RISE,Luleå tekniska universitet,Kemiteknik,RISE Energy Technology Center, Box 726, 941 28, Piteå, Sweden,Energi och resurser,Luleå University of Technology, Sweden(Swepub:ltu)olor (author)
  • Finelli, ValeriaDepartment of Chemistry, NIS and INSTM Reference Centre, Università di Torino, Via G. Quarello 15, I-10135 and Via P. Giuria 7, I-10125, Torino, Italy (author)
  • Signorile, MatteoDepartment of Chemistry, NIS and INSTM Reference Centre, Università di Torino, Via G. Quarello 15, I-10135 and Via P. Giuria 7, I-10125, Torino, Italy (author)
  • Crocellà, ValentinaDepartment of Chemistry, NIS and INSTM Reference Centre, Università di Torino, Via G. Quarello 15, I-10135 and Via P. Giuria 7, I-10125, Torino, Italy (author)
  • Grahn, MattiasLuleå tekniska universitet,Kemiteknik,Luleå University of Technology, Sweden(Swepub:ltu)magr (author)
  • Luleå tekniska universitetKemiteknik (creator_code:org_t)

Related titles

  • In:Journal of Catalysis: Elsevier410, s. 320-3320021-95171090-2694

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