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Modeling and Kinetic Study of the Transformation of C6- Paraffins Over Methanol to Olefin Catalyst

Roohollahi, Gholamreza | 2011

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 41816 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Kazemeini, Mohammad; Mohammad Rezaie, Alireza
  7. Abstract:
  8. Catalytic cracking of iso and normal butane over HZSM-5 at several temperatures and a variety of contact time and different partial pressures of hydrocarbon feed was conducted. Experiments indicate that the operating conditions have considerable effects on final product distribution and feed conversion. Results show that high temperatures, low contact time and partial pressure of paraffin feed favor the light olefin production, particularly propylene production. Results obtained for iso-butane show a similar conversion values in comparison to n-butane but a higher olefin and propylene selectivity. Finally kinetic modeling of both iso and normal butane cracking was performed based on a lump compound specialized-model which represented an excellent consistency between calculated and experimental results and had a very high accuracy for both paraffins.
    Joint reaction of methanol and i-butane over catalyst samples for different ration of these compounds at several temperatures and a wide variety of contact time in 2 cases, addition of water into methanol liquid feed and not addition of water, was performed. Results showed that the optimum ration for MeOH/i-C4 was 3 regardless that water is whether introduced into the reactor besides methanol or not. The data obtained during many tests showed that highest amounts of propylene and light olefins were produced at 520 °C while the lowest amounts for paraffins were obtained
  9. Keywords:
  10. Kinetics Modeling ; Methanol Conversion to Propylene (MTP)Process ; Zeolite Catalyst HZSM-5 ; Normal Butane Cracking ; Coupled Reaction of Methanol and I-butane

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