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Characterisation of HZSM-5 film to study Xylene Isomerisation using FTIR/ATR spectroscopy
2009 (English)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

The earlier studies carried out in the Zeolite Research group at Division of Chemical technology, showed some promising results regarding the use of FTIR/ATR technique for characterizing zeolite films. The observations indicated that the FTIR/ATR technique could be used as a characterization technique for investigating the performance as well as reaction & its kinetics occurring on active film at different temperatures and pressures. But during the experiment performed at 150oC and 828Pa for xylene isomerisation in presence of HZSM-5 film coated on ZnS crystal, some anomalies were observed within the spectral range 1300-1450 cm-1 that were not reported. In current work, zeolite ZSM-5 films were synthesized on ZnS ATR elements by an in-situ method. The films were subsequently activated by introducing Brönstedt acid sites. Xylene isomerisation reaction was successfully performed at 150oC and 828Pa on activated ZSM-5 film. The adsorption and desorption spectra obtained suggested that the bands at 1377 and 1412 cm-1 are related to methyl group of xylene and coke species. This was further confirmed by 2DCOS (Two dimensional correlation spectroscopy) treatment of the adsorption and desorption spectra. In addition tilt angle determined experimentally for p-xylene (1516 cm-1) and poly-aromatic coke (1593 cm-1) was ∼20o and ∼38o, which indicates that p-xylene adsorbs preferentially in the ZSM-5 film whereas coke adsorption is neither completely preferential nor completely random.

Place, publisher, year, edition, pages
2009.
Keyword [en]
Physics Chemistry Maths, Zeolites, ZSM-5, Xylene Isomerisation, FTIR/ATR, 2D-COS
Keyword [sv]
Fysik, Kemi, Matematik
Identifiers
URN: urn:nbn:se:ltu:diva-51285ISRN: LTU-CUPP--09/304--SELocal ID: 87f15f66-0082-4c24-af4a-8ffb40194ec5OAI: oai:DiVA.org:ltu-51285DiVA: diva2:1024646
Subject / course
Student thesis, at least 15 credits
Educational program
Chemical Engineering, bachelor's level
Supervisors
Examiners
Note
Validerat; 20101217 (root)Available from: 2016-10-04 Created: 2016-10-04Bibliographically approved

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Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
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Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
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Output format
  • html
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  • asciidoc
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