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

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

Energy, 2023, vol. 263, issue PB

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.

Keywords: Waste cooking oil; Pyrolysis; CaO; Composite catalyst; Renewable energy; Hydrocarbon (search for similar items in EconPapers)
Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:263:y:2023:i:pb:s0360544222025695

DOI: 10.1016/j.energy.2022.125683

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