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<p>To meet aviation decarbonization targets, efficient catalysts for bio-jet fuel are needed. Hydrodeoxygenation (HDO) is an indispensable step in converting lipid feedstocks to jet-range hydrocarbons, which critically depends on the pore architecture, acidity distribution and metal dispersion of the catalysts. In this work, a layered SAPO-11 (LS) molecular sieve was synthesized using the polyamine surfactant (C<sub>22</sub>H<sub>45</sub>-N(CH<sub>3</sub>)-C<sub>6</sub>H<sub>12</sub>-N(CH<sub>3</sub>)<sub>2</sub>) as a micro-mesopore-directing agent. Ni species were introduced to obtain a series of Ni<sub><i>x</i></sub>/LS catalysts with the Ni loadings of <i>x</i> wt% (<i>x</i> = 3.0, 6.0, and 9.0), in which Ni<sub>6</sub>/LS exhibited the best HDO performance. Using methyl laurate (ML) as a model feedstock, at the optimized conditions of 360&#xa0;°C, 2.0&#xa0;MPa and a weight hourly space velocity (WHSV) of 6.0&#xa0;h<sup>− 1</sup>, the Ni<sub>6</sub>/LS catalyst had the 99.6% conversion of ML with the 97.3% selectivity toward C<sub>11</sub>-C<sub>12</sub> alkanes, surpassing the conventional Ni<sub>6</sub>/microporous SAPO-11 (Ni<sub>6</sub>/MS) catalyst and the literature-reported catalysts. The superior lipid HDO performance of Ni<sub>6</sub>/LS was attributed that the layered architecture of LS provided a larger specific surface area and more mesoporous channels than MS, greatly promoting the high dispersion of Ni species. </p> Graphical Abstract <p></p>

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Construction of Layered Ni/SAPO-11 Catalysts to Promote Lipid Hydrodeoxygenation

  • 期刊论文

  • 发表日期：

    2026年1月21日

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  • Yang Yu,
  • Xuefeng Song,
  • Wenli Su,
  • Wenjiang Jing,
  • Yu Fan

摘要

To meet aviation decarbonization targets, efficient catalysts for bio-jet fuel are needed. Hydrodeoxygenation (HDO) is an indispensable step in converting lipid feedstocks to jet-range hydrocarbons, which critically depends on the pore architecture, acidity distribution and metal dispersion of the catalysts. In this work, a layered SAPO-11 (LS) molecular sieve was synthesized using the polyamine surfactant (C22H45-N(CH3)-C6H12-N(CH3)2) as a micro-mesopore-directing agent. Ni species were introduced to obtain a series of Nix/LS catalysts with the Ni loadings of x wt% (x = 3.0, 6.0, and 9.0), in which Ni6/LS exhibited the best HDO performance. Using methyl laurate (ML) as a model feedstock, at the optimized conditions of 360 °C, 2.0 MPa and a weight hourly space velocity (WHSV) of 6.0 h− 1, the Ni6/LS catalyst had the 99.6% conversion of ML with the 97.3% selectivity toward C11-C12 alkanes, surpassing the conventional Ni6/microporous SAPO-11 (Ni6/MS) catalyst and the literature-reported catalysts. The superior lipid HDO performance of Ni6/LS was attributed that the layered architecture of LS provided a larger specific surface area and more mesoporous channels than MS, greatly promoting the high dispersion of Ni species.

Graphical Abstract