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Microwave-assisted pyrolysis of waste cooking oil for bio-based hydrocarbons over Chem-CaO@SiC catalyst

Author

Listed:
  • Wu, Qiuhao
  • Zhang, Letian
  • Ke, Linyao
  • Zhang, Qi
  • Cui, Xian
  • Yang, Qi
  • Wang, Yuanyuan
  • Dai, Anqi
  • Xu, Chuangxin
  • Liu, Yuhuan
  • Ruan, Roger
  • Wang, Yunpu

Abstract

Bio-based hydrocarbons derived from biomass pyrolysis is an important supplement to the fossil resources. The inhomogeneous temperature of catalytic bed is one of the important reasons for catalyst deactivation. Chem-CaO@SiC catalyst was synthesized for the conversion of waste cooking oil (WCO) to bio-based hydrocarbons in this paper. Compared with the catalyst prepared from physical mixing, the catalyst prepared by chemical reaction was performed better in maintaining the bio-oil yield and increasing the relative content of hydrocarbons in bio-oil. Catalyst characterization showed that CaO was well supported on the SiC-powder surface. Then the effects of SiC-ball bed temperature and CaO loading rate on product yield and distribution were investigated. Also, the deoxygenation pathway was discussed. More polycyclic aromatics were produced when the SiC-ball bed temperature was 550 °C and above. And the composite catalyst could inhibit the formation of PAHs. The bio-oil yield increased and high heating value of gas products decreased with the decrease SiC-to-CaO ratio, and more energy from the WCO flowed into bio-oil. The catalyst remained 0.622 times of the initial activity after 5 cycles.

Suggested Citation

  • Wu, Qiuhao & Zhang, Letian & Ke, Linyao & Zhang, Qi & Cui, Xian & Yang, Qi & Wang, Yuanyuan & Dai, Anqi & Xu, Chuangxin & Liu, Yuhuan & Ruan, Roger & Wang, Yunpu, 2023. "Microwave-assisted pyrolysis of waste cooking oil for bio-based hydrocarbons over Chem-CaO@SiC catalyst," Energy, Elsevier, vol. 263(PB).
    • Handle: RePEc:eee:energy:v:263:y:2023:i:pb:s0360544222025695
    DOI: 10.1016/j.energy.2022.125683
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    References listed on IDEAS

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    1. Luo, Juan & Sun, Shichang & Chen, Xing & Lin, Junhao & Ma, Rui & Zhang, Rui & Fang, Lin, 2021. "In-depth exploration of the energy utilization and pyrolysis mechanism of advanced continuous microwave pyrolysis," Applied Energy, Elsevier, vol. 292(C).
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    1. Lin, Yi Li & Zheng, Nai Yun & Lin, Wei Hsiu & Chang, Chao Chin, 2025. "Economic and environmentally efficient biochar production via microwave-assisted co-torrefaction of fruit residue and waste oil," Renewable and Sustainable Energy Reviews, Elsevier, vol. 209(C).
    2. Aghababaeian, Shiva & Beygzadeh, Mojtaba & Dehghan, Maziar & Halek, Farah-Sadat & Aminy, Mohammad, 2024. "Energy and economic aspects of efficient radiative heating for biodiesel production: Prospects and challenges of using solid magnetic CaO/CoFe2O4 nano-catalyst," Energy, Elsevier, vol. 289(C).

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