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Metal loading on CaO/Al2O3 pellet catalyst as a booster for transesterification in biodiesel production

Author

Listed:
  • Chanthon, Narita
  • Munbupphachart, Nattawadee
  • Ngaosuwan, Kanokwan
  • Kiatkittipong, Worapon
  • Wongsawaeng, Doonyapong
  • Mens, Weerinda
  • Rokhum, Samuel Lalthazuala
  • Assabumrungrat, Suttichai

Abstract

The enhancement in the catalytic activity by using metal loading on CaO/Al2O3 pellet catalysts (M-CaO/Al2O3) for transesterification of palm oil with a 12:1 methanol-to-oil molar ratio and 10 wt% of catalyst loading and stirring speed of 600 rpm at a reaction temperature of 65 °C was revealed. FAME yields at 6 h reaction time using K-CaO/Al2O3, Sr-CaO/Al2O3, Fe-CaO/Al2O3, Li-CaO/Al2O3, and CaO/Al2O3 pellet catalysts were 88.8, 85.2, 67.0, 84.0, and 78.7%, respectively. M-CaO/Al2O3 pellet catalysts can promote the initial rate, initial TOF, and FAME yield since the metal loading on the CaO/Al2O3 pellet catalyst changes the environment of surface oxygen to increase lattice oxygen (O2−) as Lewis basic site. This work highlighted the role of O2− in the basicity and initial TOF with a linear correlation for metal oxide pellet catalyst. Although the K-CaO/Al2O3 pellet catalyst gave the highest FAME yield, the highest leaching of the active species was observed. Therefore, the high catalytic activity and stability of the Sr-CaO/Al2O3 pellet catalyst confirmed that there is more potential to drive toward continuous biodiesel production in the industry.

Suggested Citation

  • Chanthon, Narita & Munbupphachart, Nattawadee & Ngaosuwan, Kanokwan & Kiatkittipong, Worapon & Wongsawaeng, Doonyapong & Mens, Weerinda & Rokhum, Samuel Lalthazuala & Assabumrungrat, Suttichai, 2023. "Metal loading on CaO/Al2O3 pellet catalyst as a booster for transesterification in biodiesel production," Renewable Energy, Elsevier, vol. 218(C).
    • Handle: RePEc:eee:renene:v:218:y:2023:i:c:s096014812301251x
    DOI: 10.1016/j.renene.2023.119336
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