The study fabricated ZSM-22 zeolites with Ce/Al molar ratios ranging from 0 to 1, which were subsequently loaded with Pt to perform n-hexadecane hydroisomerization. Various methods, such as XRD, ²⁹Si NMR, FTIR, UV–Vis, XPS, and H₂-TPR, confirmed the direct evidence of Ce incorporation into the zeolite framework, and the framework Ce content was of a volcanic nature. Furthermore, the study observed successful manipulation of textural and acidity properties of the samples through variation of the Ce content, as shown by N₂-physisorption, NH₃-TPD, and Py-IR. Increasing Ce content led to retardation of micropore diffusion due to lower micropore volume and surface area, as well as an increase in the distribution of weak Brønsted acid sites, which suppressed outside-of-pore cracking reactions. These changes rendered improved i-hexadecane selectivity and catalyst stability for Pt/ZSM-22. At a Ce/Al molar ratio of 0.5 with a WHSV of 12 h⁻¹, the high selectivity to monobranched isomers resulted in a yield exceeding 75 wt%.

该研究制备了 Ce/Al 摩尔比为 0 至 1 的 ZSM-22 沸石，随后负载 Pt 进行正十六烷加氢异构化。^{XRD、 29} Si NMR、FTIR、UV-Vis、XPS、H _{2 -TPR}等多种方法证实了Ce掺入沸石骨架的直接证据，且骨架Ce含量具有火山性质。_{此外，该研究还观察到通过改变 Ce 含量成功地控制了样品的质地和酸度特性，如 N 2}物理吸附、NH ₃所示。-TPD 和 Py-IR。Ce含量的增加导致微孔扩散的延迟，这是由于微孔体积和表面积的降低，以及弱布朗斯台德酸位点分布的增加，从而抑制了孔外裂解反应。这些变化提高了 Pt/ZSM-22 的间十六烷选择性和催化剂稳定性。在Ce/Al摩尔比为0.5且WHSV为12 h ^-1时，对单支化异构体的高选择性导致产率超过75wt%。