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<p>Ni/SAPO-11 catalysts with highly dispersed Ni (TA-Ni/SA-11) were prepared using tartaric acid as a dispersant. The effect of the tartaric acid content on the physiochemical properties of the TA-Ni/SA-11 catalysts and their n-heptane hydroisomerization performance were investigated. TA-Ni/SA-11 exhibits smaller Ni particles and more Ni active sites in comparison to conventional Ni/SAPO-11 prepared via the impregnation method due to the interaction between tartaric acid and Ni<sup>2+</sup>. As the molar ratio of tartaric acid and Ni<sup>2+</sup> (n<sub>TA</sub>/n<sub>Ni</sub>) increases, the number of Ni active sites in TA-Ni/SA-11 rises, while the surface area and relative crystallinity decrease because of the dealumination of SAPO-11. When n<sub>TA</sub>/n<sub>Ni</sub> is 0.75, 0.75TA-Ni/SA-11 presents the highest n-heptane conversion of 82.4% and isomer selectivity of 90.5%, as well as the lowest cracking selectivity of 9.0% at 380&#xa0;°C, 1.5&#xa0;MPa, 2&#xa0;h<sup>− 1</sup>, and a volume ratio of H<sub>2</sub> to n-heptane of 400 among these catalysts.</p> Graphical Abstract <p></p>

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Tartaric Acid Assisted Preparation of Highly Dispersed Ni/SAPO-11 Catalysts for Hydrocarbon Hydroisomerization

  • 期刊论文

  • 发表日期：

    2025年1月23日

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  • Chenglong Wen,
  • Kang Liu,
  • Yi Lu,
  • Xintian Wu,
  • Shuning Li,
  • Mohong Lu,
  • Jie Zhu,
  • Mingshi Li,
  • Chunshan Song,
  • Xiaosong Lu

摘要

Ni/SAPO-11 catalysts with highly dispersed Ni (TA-Ni/SA-11) were prepared using tartaric acid as a dispersant. The effect of the tartaric acid content on the physiochemical properties of the TA-Ni/SA-11 catalysts and their n-heptane hydroisomerization performance were investigated. TA-Ni/SA-11 exhibits smaller Ni particles and more Ni active sites in comparison to conventional Ni/SAPO-11 prepared via the impregnation method due to the interaction between tartaric acid and Ni2+. As the molar ratio of tartaric acid and Ni2+ (nTA/nNi) increases, the number of Ni active sites in TA-Ni/SA-11 rises, while the surface area and relative crystallinity decrease because of the dealumination of SAPO-11. When nTA/nNi is 0.75, 0.75TA-Ni/SA-11 presents the highest n-heptane conversion of 82.4% and isomer selectivity of 90.5%, as well as the lowest cracking selectivity of 9.0% at 380 °C, 1.5 MPa, 2 h− 1, and a volume ratio of H2 to n-heptane of 400 among these catalysts.

Graphical Abstract