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Chemistry and Industry of Forest Products ›› 2021, Vol. 41 ›› Issue (6): 83-89.doi: 10.3969/j.issn.0253-2417.2021.06.011

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KNO3-Loaded Mesoporous Carbon Catalyzed Transesterification Reaction of Cornus wilsoniana Oil

Qin WANG1,2(), Hongmei WANG1, Aihua ZHANG2,*(), Zhihong XIAO2, Changzhu LI2   

  1. 1. College of Chemistry and Food Engineering, Changsha University of Science and Technology, Changsha 410114, China
    2. Hunan Academy of Forestry, Changsha 410004, China
  • Received:2020-11-09 Online:2021-12-28 Published:2021-12-31
  • Contact: Aihua ZHANG E-mail:1075291183@qq.com;zhangaihua909@163.com


Using sucrose as the carbon source and SBA-15 as the mesoporous template, the CMK-3 mesoporous carbon was prepared by the hard template method. And then, the mesoporous carbon-based solid base catalyst by loading KNO3 that could efficiently catalyze the production of biodiesel from Cornus wilsoniana oil was prepared by the impregnation method. Catalytic experiments were carried out to determine the catalytic activity of KNO3/CMK-3 and explore the best preparation conditions by comparing the transesterification rate of biodiesel. The catalyst was characterized by SEM, TEM, BET, XRD, CO2-TPD, etc.. The research results showed that the optimal loading conditions were calcination temperature 450 ℃, calcination time 2 h, loading amount of KNO3 7.5%. Under these conditions, the transesterification rate of biodiesel from C.wilsoniana oil could reach 95.95%. The catalyst 7.5%KNO3/CMK-3 was characterized by SEM, TEM, BET, XRD, CO2-TPD and so on, the results showed that the alkali content of the catalyst 7.5%KNO3/CMK-3 was 0.921 1 mmol/g, the surface area was 93.95 m2/g, the total pore volume was 0.114 6 cm3/g and the pore size was 4.879 nm. Before and after the modification, the alkaline active molecule was loaded on the meso-carbon and the rodstructure of carbon skeleton remained stable. The FT-IR and GC-MS analysis results showed that the mass fractions of methyl linolenate and methyl oleate in the obtained biodiesel were the highest, and were 45.97% and 32.08%.

Key words: biodiesel, Cornus wilsoniana oil, transesterification reaction, solid base catalyst, CMK-3

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