Search: L773:1090 2694 >
Controlling diffusi...
Controlling diffusion resistance, selectivity and deactivation of ZSM-5 catalysts by crystal thickness and defects
-
- Hedlund, Jonas (author)
- Luleå tekniska universitet,Kemiteknik,Luleå University of Technology, Sweden
-
- Zhou, Ming (author)
- Luleå tekniska universitet,Kemiteknik,Luleå University of Technology, Sweden
-
- Faisal, Abrar (author)
- Luleå tekniska universitet,Kemiteknik,Luleå University of Technology, Sweden
-
show more...
-
- Öhrman, Olov G.W. (author)
- RISE,Luleå tekniska universitet,Kemiteknik,RISE Energy Technology Center, Box 726, 941 28, Piteå, Sweden,Energi och resurser,Luleå University of Technology, Sweden
-
- Finelli, Valeria (author)
- Department 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
-
- Signorile, Matteo (author)
- Department 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
-
- Crocellà, Valentina (author)
- Department 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
-
- Grahn, Mattias (author)
- Luleå tekniska universitet,Kemiteknik,Luleå University of Technology, Sweden
-
show less...
-
(creator_code:org_t)
- Elsevier, 2022
- 2022
- English.
-
In: Journal of Catalysis. - : Elsevier. - 0021-9517 .- 1090-2694. ; 410, s. 320-332
- Related links:
-
https://doi.org/10.1...
-
show more...
-
https://urn.kb.se/re...
-
https://doi.org/10.1...
-
https://urn.kb.se/re...
-
show less...
Abstract
Subject headings
Close
- 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.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Kemiska processer (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Chemical Process Engineering (hsv//eng)
- NATURVETENSKAP -- Biologi -- Biokemi och molekylärbiologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Biochemistry and Molecular Biology (hsv//eng)
- NATURVETENSKAP -- Kemi -- Fysikalisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Physical Chemistry (hsv//eng)
Keyword
- H-ZSM-5
- Defects
- Gasoline
- Deactivation
- MTG
- Chemical Technology
- Kemisk teknologi
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
To the university's database