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<p>The utilization of biomass as a feedstock for aviation kerosene production serves to alleviate demand pressure on petroleum resources. In this work, commercial hydroxyapatite (HAP) was used as a support to fabricate a series of mono- and bimetallic Pt-Ni catalysts via impregnation. These catalysts were then evaluated for the decarboxylation of oleic acid under a non-hydrogen atmosphere. The XRD and TEM analyses revealed that the Pt metal particles were highly dispersed, whereas the Ni particles exhibited a tendency toward aggregation with increasing loading. Furthermore, Pt-Ni bimetallic particles exhibited aggregation with elevated Ni content. Combined NH<sub>3</sub>-TPD and Py-IR characterization indicated that the 1.5Pt2Ni/HAP bimetallic catalyst possessed appropriate acidity(5.18 cm<sup>3</sup>/g STP) and abundant Lewis acid sites, as evidenced by a Brønsted-to-Lewis ratio of 0.32. Catalytic results demonstrated that under CO<sub>2</sub> atmosphere at 340&#xa0;°C and 18&#xa0;bar for 6&#xa0;h, the 1.5Pt2Ni/HAP catalyst achieved complete conversion of oleic acid and the yield of C<sub>8</sub>-C<sub>17</sub> alkanes reached as high as 85.0%.</p>

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Bimetallic PtNi/HAP catalyst facilitated decarboxylation of oleic acid into C8-C17 alkanes

  • 期刊论文

  • 发表日期：

    2025年10月27日

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  • Ke Wang,
  • Xiang Shi,
  • Hong Yuan

摘要

The utilization of biomass as a feedstock for aviation kerosene production serves to alleviate demand pressure on petroleum resources. In this work, commercial hydroxyapatite (HAP) was used as a support to fabricate a series of mono- and bimetallic Pt-Ni catalysts via impregnation. These catalysts were then evaluated for the decarboxylation of oleic acid under a non-hydrogen atmosphere. The XRD and TEM analyses revealed that the Pt metal particles were highly dispersed, whereas the Ni particles exhibited a tendency toward aggregation with increasing loading. Furthermore, Pt-Ni bimetallic particles exhibited aggregation with elevated Ni content. Combined NH3-TPD and Py-IR characterization indicated that the 1.5Pt2Ni/HAP bimetallic catalyst possessed appropriate acidity(5.18 cm3/g STP) and abundant Lewis acid sites, as evidenced by a Brønsted-to-Lewis ratio of 0.32. Catalytic results demonstrated that under CO2 atmosphere at 340 °C and 18 bar for 6 h, the 1.5Pt2Ni/HAP catalyst achieved complete conversion of oleic acid and the yield of C8-C17 alkanes reached as high as 85.0%.