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Magnetic Solid Base Catalysts for the Production of Biodiesel

  • Pingmei Guo
  • Fenghong HuangEmail author
  • Mingming Zheng
  • Wenlin Li
  • Qingde Huang
Original Paper

Abstract

Magnetic solid base catalysts were prepared by loading Na2SiO3 on Fe3O4 nano-particles with Na2O·3SiO2 and NaOH as precipitator. The catalysts were used to catalyze the transesterification reactions for the production of fatty acid methyl esters (FAME, namely biodiesel) from cottonseed oil. The optimum conditions of the catalysts' preparation and transesterification reactions were investigated by orthogonal experiments. The catalyst with the highest catalytic activity was obtained when Si/Fe molar ratio of 2.5, aging time of 2 h, calcination temperature of 350 °C, calcination time of 2.5 h. Magnetic of the catalyst was characterized with Vibrating Sample Magnetometer (VSM) and transmission electron microscopy photograph (TEM), and the results showed the catalyst Na2SiO3/Fe3O4 had good specific saturation magnetization and paramagnetism, and its water resistance was better than the traditional homogeneous base catalysts; under the transesterification conditions of methanol/oil molar ratio of 7:1, catalyst dosage of 5%, reaction temperature of 60 °C, reaction time of 100 min and stirring speed of 400 rpm, yield of biodiesel was 99.6%. The lifetime and recovery rate of the magnetic solid base catalyst were much better than those of Na2SiO3.

Keywords

Biodiesel Magnetic Solid Base Catalyst Transesterification 

Notes

Acknowledgments

We are grateful for the National Science and Technology Support Program (No. 2011BAD22B04), Director Fund of Oil Crops Research Institute (No.1610172011014), High Technology R&D Program (863 project) (No. 2010AA101503).

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Copyright information

© AOCS 2011

Authors and Affiliations

  • Pingmei Guo
    • 1
    • 2
  • Fenghong Huang
    • 1
    • 2
    Email author
  • Mingming Zheng
    • 1
    • 2
  • Wenlin Li
    • 1
    • 2
  • Qingde Huang
    • 1
    • 2
  1. 1.Oil Crops Research InstituteChinese Academy of Agricultural SciencesWuhanChina
  2. 2.Energy Crops and Bio-diesel Center of Hubei ProvinceWuhanChina

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