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The synthesis and t...
The synthesis and testing of thin film ZSM-5 catalysts
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- Hedlund, Jonas (author)
- Luleå tekniska universitet,Industriell miljö- och processteknik
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Öhrman, Olov (author)
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- Msimang, Velaphi (author)
- University of Cape Town
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- van Steen, Eric (author)
- University of Cape Town
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- Böhringer, Walter (author)
- University of Cape Town
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- Sibya, Sifiso (author)
- University of Cape Town
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- Möller, Klaus (author)
- University of Cape Town
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(creator_code:org_t)
- Elsevier BV, 2004
- 2004
- English.
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In: Chemical Engineering Science. - : Elsevier BV. - 0009-2509 .- 1873-4405. ; 59:13, s. 2647-2657
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- The synthesis and catalytic testing of thin ZSM-5 films on glass and alumina beads is described. The thickness of the ZSM-5 films was controlled to 150, 350, 800 and 2300 nm. The samples were characterised by SEM, gas adsorption and p-xylene isomerisation and 1,3,5-tri-isopropyl benzene cracking test reactions. A reaction–diffusion model adequately described the p-xylene isomerisation data. Estimates of model parameters were obtained by fitting the model to the experimental data. In both cases, the reaction rate constant increased with increasing film thickness. The xylene reaction data showed that secondary reaction products increased as expected with increasing diffusion limitations, but the increase was less than that predicted by the variation of thickness only. The trends in the reaction data could be explained by more defects in the thicker films and/or partial poisoning of the zeolite by mobile support cations in thinner films and/or orientation effects.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Kemiska processer (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Chemical Process Engineering (hsv//eng)
Keyword
- Chemical Technology
- Kemisk teknologi
Publication and Content Type
- ref (subject category)
- art (subject category)
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