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Highly porous cobalt and molybdenum-containing ordered silica applied to pyrolysis of sunflower oil into bio-hydrocarbons

Author

Listed:
  • Souza, Márcio C.M.
  • Maia, Francisco A.D.
  • Pinto, Vasco L.
  • Costa, Maria J.F.
  • Araújo, Aruzza M.M.
  • da Silva, Djalma R.
  • Santos, Anne Gabriella D.
  • Gondim, Amanda D.

Abstract

The growth of the global population continues to increase the demand for energy. Petroleum-based fuels are the most used, resulting in very high emissions of greenhouse gasses. The aim of this present work was to undertake a kinetic study of the production of bio-hydrocarbons from oil sunflower, using catalysts composed of ordered mesoporous silica MCM-41 impregnated with cobalt and molybdenum oxides. The catalysts synthesized in this study underwent characterization using XRD, FRX, FTIR, SEM and TGA analysis. Thermal & catalytic kinetics approaches used in the research were the Ozawa-Flynn-Wall and Kissinger-Akahira-Sunose methods. The TGA analyses revealed catalytic activity of the synthesized materials and their ability to reduce the activation energy (Ea) during the degradation/volatilization process of sunflower oil. Notably, Mo/MCM-41 exhibited the most significant reduction in Ea, approximately 44%. In the thermal pyrolysis process without a catalyst, the percentage of hydrocarbons formed was 16%, while in the catalytic pyrolysis, the percentages of hydrocarbons obtained were 28% (MCM-41), 16% (Mo/MCM-41), 21% (Co/MCM-41), and 45% (Co–Mo/MCM-41). For MCM-41, 8% was in the gasoline range, 29% was in the biokerosene range, and 62% was in the green diesel range. For the Mo/MCM-41, Co/MCM-41, and Co–Mo/MCM-41 catalysts, the biokerosene range corresponded to 24%, 27%, and 19%, while the green diesel range corresponded to 75%, 72%, and 80%, respectively.

Suggested Citation

  • Souza, Márcio C.M. & Maia, Francisco A.D. & Pinto, Vasco L. & Costa, Maria J.F. & Araújo, Aruzza M.M. & da Silva, Djalma R. & Santos, Anne Gabriella D. & Gondim, Amanda D., 2023. "Highly porous cobalt and molybdenum-containing ordered silica applied to pyrolysis of sunflower oil into bio-hydrocarbons," Renewable Energy, Elsevier, vol. 215(C).
    • Handle: RePEc:eee:renene:v:215:y:2023:i:c:s0960148123008686
    DOI: 10.1016/j.renene.2023.118962
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    References listed on IDEAS

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    1. Araújo, Aruzza Mabel de Morais & Lima, Regineide de Oliveira & Gondim, Amanda Duarte & Diniz, Juraci & Souza, Luiz Di & Araujo, Antonio Souza de, 2017. "Thermal and catalytic pyrolysis of sunflower oil using AlMCM-41," Renewable Energy, Elsevier, vol. 101(C), pages 900-906.
    2. Oliveira, João Leonardo F. & Batista, Luana M.B. & Alburquerque dos Santos, Nataly & Araújo, Aruzza M.M. & Fernandes, Valter J. & Araujo, Antonio S. & Alves, Ana P.M. & Gondim, Amanda D., 2021. "Clay-supported zinc oxide as catalyst in pyrolysis and deoxygenation of licuri (Syagrus coronata) oil," Renewable Energy, Elsevier, vol. 168(C), pages 1377-1387.
    3. de Souza, Lorena Mendes & Mendes, Pietro A.S. & Aranda, Donato A.G., 2020. "Oleaginous feedstocks for hydro-processed esters and fatty acids (HEFA) biojet production in southeastern Brazil: A multi-criteria decision analysis," Renewable Energy, Elsevier, vol. 149(C), pages 1339-1351.
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