Nanosized ZSM-5 zeolites (NZ5(x) series) with different SiO₂/Al₂O₃ ratios as well as samples isomorphously substituted by Fe ([Fe,Al]NZ5(x) series) with various SiO₂/(Al₂O₃+Fe₂O₃) ratios were synthesized by an in situ seed-induced hydrothermal method. The structure, morphology, textural and acidity of catalysts were characterized via XRD, SEM, ²⁷Al and ²⁹Si MAS NMR, UV–vis spectroscopy, XPS, N₂ physical adsorption, NH₃-TPD and Py-IR. The catalytic performance was assessed by methanol-to-olefins (MTO) reaction and the effect of the textural and acidity of the two series of samples on the catalytic performance was also investigated. The results showed that the catalyst acidity is closely related to the product selectivity in the MTO reaction. Compared with NZ5(x), the [Fe,Al]NZ5(x) samples with smaller particle size, weaker acid strength and fewer Brønsted acid sites displayed a higher selectivity towards C₂∼C₄ light olefins. Highest selectivity of 82.7% for C₂∼C₄ light olefins and lowest coke amount of 0.71% after reaction for 50 h was obtained for the [Fe,Al]NZ5(300) catalyst due to the appropriate acidity and improved diffusion properties.

纳米ZSM-5沸石（NZ5（X）系列）具有不同的SiO ₂ / Al的_2分ö ₃比以及由铁同晶取代的样品（[铁，铝] NZ5（X）系列）与各种的SiO ₂ /（铝₂通过原位种子诱导的水热法合成O ₃ + Fe ₂ O ₃）的比率。通过XRD，SEM，²⁷ Al和²⁹ Si MAS NMR，UV-vis光谱，XPS，N ₂物理吸附，NH ₃表征了催化剂的结构，形态，结构和酸度。-TPD和Py-IR。通过甲醇制烯烃（MTO）反应评估了催化性能，还研究了两个系列的质地和酸度对催化性能的影响。结果表明，催化剂的酸度与MTO反应的产物选择性密切相关。与NZ5（相比X）中，[铁，铝] NZ5（X）的样品具有较小的颗粒尺寸，更弱的酸强度和较少的布朗斯台德酸位点显示向下的更高的选择性₂〜C ₄轻质烯烃。的对C 82.7％选择性最高₂〜C ₄的[铁，铝] NZ5（得到轻质烯烃和50小时反应后的0.71％的最低量的焦炭300）催化剂，因为它具有适当的酸度和改善的扩散性能。