Isomerization of n-Dodecane for High Selectivity of Multibranched Iso-dodecane over Pt/ZSM-22 – Y Catalyst,Industrial & Engineering Chemistry Research

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Isomerization of n-Dodecane for High Selectivity of Multibranched Iso-dodecane over Pt/ZSM-22 – Y Catalyst
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2023-12-04 , DOI: 10.1021/acs.iecr.3c02836
Jia Liu _{1,

2} , Hong Yang ₃ , Zhaoyang Song ₂ , Jing Sun ₁ , Xinwen Guo ₄

Affiliation

In this study, Pt/ZSM-22, Pt/Y, Pt/ZSM-22 + Y (the support is a mechanically blended mixture of ZSM-22 and Y at 1:1 weight ratio), and Pt/ZSM-22 – Y (the support is NaOH + CTAB-treated ZSM-22 + Y) with 0.5 wt % of Pt loading were synthesized and applied as catalysts in the hydroisomerization of n-dodecane. The microstructures and acidic properties of these catalysts were characterized by XRD, TEM, BET, N₂ adsorption–desorption isotherms, NH₃-TPD, Py-IR, and ²⁷Al-NMR. This study revealed significantly different acidic properties and catalytic performances between the mechanically mixed Pt/ZSM-22 + Y and post-treated Pt/ZSM-22 – Y. In particular, Pt/ZSM-22 – Y not only delivers a high n-dodecane conversion but also significantly enhances the yield and selectivity of multibranched iso-dodecane. This enhanced selectivity of multibranched iso-dodecane may be attributed to the high number of medium-strong acid sites and increased mesopores generated by the post-treatment process.

中文翻译：

Pt/ZSM-22 – Y 催化剂上正十二烷异构化以高选择性生产多支链异十二烷

在本研究中，Pt/ZSM-22、Pt/Y、Pt/ZSM-22 + Y（载体是 ZSM-22 和 Y 按 1:1 重量比机械混合的混合物）和 Pt/ZSM-22 –合成了负载量为 0.5 wt% Pt 的 Y（载体为 NaOH + CTAB 处理的 ZSM-22 + Y），并将其用作正十二烷加氢异构化的催化剂。_{通过XRD、TEM、BET、N 2}吸附-解吸等温线、NH ₃ -TPD、Py-IR和²⁷ Al-NMR对这些催化剂的微观结构和酸性性能进行了表征。这项研究揭示了机械混合的 Pt/ZSM-22 + Y 和后处理的 Pt/ZSM-22 – Y 之间显着不同的酸性特性和催化性能。特别是，Pt/ZSM-22 – Y 不仅提供高n -十二烷转化率也显着提高了多支链异十二烷的产率和选择性。多支链异十二烷的选择性增强可能归因于后处理过程产生的大量中强酸位点和增加的中孔。

更新日期：2023-12-04

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