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Modified Catalyst Based on Zeolite: Preparation, Characterization and Application as Catalysts for the Isomerization of C8 Aromatics

Yazdani, Saeed | 2015

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 47438 (03)
  4. University: Sharif University of Technology
  5. Department: Chemistry
  6. Advisor(s): Gholami, Mohammad Reza; Salari, Hadi
  7. Abstract:
  8. In this project Mordinate and Eu-1 zeolite were synthesized by hydrothermal method and then bifunctional catalysts including acid-base zeolite and Pt-Al2O3 metal base were mixed and made using a planetary mill. The modified catalysts were detected by various methods such as XRD, SEM, FTIR. The aim of this project is to synthesize and characterize the modified catalysts and to escalate their catalytic properties. Our focus is primarily on the synthesis of zeolite-based catalysts modified with unique features such as having active acid sites, high thermal stability and appropriate selectivity for the purpose of investigating the mechanism and kinetics of the C8 aromatic Compounds isomerization. The unique properties listed, along with the high mechanical and chemical resistance, may yield numerous applications in a wide range of C8 aromatics isomerization including meta-xylene, ortho-xylene, para-xylene and ethylbenzene. Among the catalysts, zeolite Mordinate widely uses its acid sites for isomerization of ethyl benzene to para-xylene. But this catalyst has a lower activity and selectivity compared to Eu-1 zeolite and that is why its structure for isomerization reaction is incomplete. Ethyl benzene isomerization reaction to Para-xylene using the modified Catalyst Eu-1 which is doped with platinum due to the acidic active sites and the possibility of getting with metals such as platinum, about 0.5 wt% platinum shows a more active and effective isomerization process
  9. Keywords:
  10. Zeolite ; Isomerization ; Bifunctional Catalyst ; Aromatic Compounds ; Modified Catalyst

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