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Abstract <p>Deoxygenation of various fatty acid methyl esters (FAMEs) and inedible biolipids to diesel-range alkanes was investigated over an efficient dual-supported Co-based catalyst (Co/Zr<sub><i>n</i></sub>–SiO<sub>2</sub>). The combination of SiO<sub>2</sub> and ZrO<sub>2</sub> dual-support improves the catalytic performance and reduces the apparent activation energy of the Co-based catalyst, with three advantages: (i) both the high surface area of SiO<sub>2</sub> and the encapsulating effect of ZrO<sub>2</sub> favor the formation of smaller Co nanoparticles and fine dispersion, which in turn reduces coke deposition; (ii) incorporating oxyphilic Zr increases the content of Co<sup>0</sup> while also improving the electron density of Co and the ratio of oxygen deficient (O<sub>D</sub>), which is favorable for the dissociation of H<sub>2</sub> and adsorption of C=O/C–O bonds; (iii) hydroxyl-rich SiO<sub>2</sub> and abundant ZrO<sub><i>x</i></sub>−O<sub>D</sub>−Co interfaces synergistically promote the hydrodeoxygenation (HDO) and suppress the decarbonylation (–CO)/decarboxylation (–COO) pathways, effectively preventing carbon loss. The Co/Zr<sub>0.25</sub>–SiO<sub>2</sub> with 10 wt% Co and 0.25 Zr/Si molar ratio is used for the deoxygenation of methyl palmitate, yielding 97.6% selectivity towards diesel-range alkanes, with 85.1% hexadecane at full MP conversion. Complex inedible biolipids such as jatropha oil and waste cooking oil can be easily transformed into diesel-range alkanes with a selectivity of 93.9% and 91.6%, respectively. Furthermore, the catalyst shows stable recyclability in the current catalytic deoxygenation system.</p> Graphical Abstract <p></p>

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Promoting Hydrodeoxygenation of Inedible Biolipids Via Coking and Sintering Resistant Co-Loaded ZrO2–SiO2 Dual-Support Catalyst

  • 期刊论文

  • 发表日期：

    2025年7月11日

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  • Jiaqi Yan,
  • Haojie Zhang,
  • Jing Guo,
  • Zhiyong Yang,
  • Yongfei Li

摘要

Abstract

Deoxygenation of various fatty acid methyl esters (FAMEs) and inedible biolipids to diesel-range alkanes was investigated over an efficient dual-supported Co-based catalyst (Co/Zrn–SiO2). The combination of SiO2 and ZrO2 dual-support improves the catalytic performance and reduces the apparent activation energy of the Co-based catalyst, with three advantages: (i) both the high surface area of SiO2 and the encapsulating effect of ZrO2 favor the formation of smaller Co nanoparticles and fine dispersion, which in turn reduces coke deposition; (ii) incorporating oxyphilic Zr increases the content of Co0 while also improving the electron density of Co and the ratio of oxygen deficient (OD), which is favorable for the dissociation of H2 and adsorption of C=O/C–O bonds; (iii) hydroxyl-rich SiO2 and abundant ZrOx−OD−Co interfaces synergistically promote the hydrodeoxygenation (HDO) and suppress the decarbonylation (–CO)/decarboxylation (–COO) pathways, effectively preventing carbon loss. The Co/Zr0.25–SiO2 with 10 wt% Co and 0.25 Zr/Si molar ratio is used for the deoxygenation of methyl palmitate, yielding 97.6% selectivity towards diesel-range alkanes, with 85.1% hexadecane at full MP conversion. Complex inedible biolipids such as jatropha oil and waste cooking oil can be easily transformed into diesel-range alkanes with a selectivity of 93.9% and 91.6%, respectively. Furthermore, the catalyst shows stable recyclability in the current catalytic deoxygenation system.

Graphical Abstract