Abstract This study deals with the modification of high silica H-ZSM-5 zeolite by different transition metals (nickel, iridium and silver). The nanocatalysts were characterized by XRD, FE-SEM, FT-IR, NH3-TPD, Pyridine adsorption IR spectra (Py-IR) and N2 adsorption-desorption. The metal (0.5 wt.%) was introduced by wet impregnation technique including multi-steps. The promoter species were uniformly distributed on the nanocatalyst without significant damage of the structure. The nickel impregnation resulted in the high crystallinity (97.2%) and well-adjusted acidity (strong/weak acidity = 0.98). The results showed that the nickel impregnation not only modulated the concentration of acid sites but also regulated the acid type. The highest methanol conversion (99.9%), light olefins selectivity (84%) and the lowest C5+ selectivity (

中文翻译：

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Ni掺杂高二氧化硅HZSM-5沸石（Si/Al = 200）纳米催化剂用于从甲醇选择性生产烯烃

摘要 本研究涉及不同过渡金属（镍、铱和银）对高二氧化硅 H-ZSM-5 沸石的改性。通过XRD、FE-SEM、FT-IR、NH3-TPD、吡啶吸附红外光谱（Py-IR）和N2吸附-解吸对纳米催化剂进行了表征。金属 (0.5 wt.%) 通过湿浸渍技术引入，包括多步。促进剂物质均匀分布在纳米催化剂上，没有显着破坏结构。镍浸渍导致高结晶度 (97.2%) 和调整良好的酸度（强/弱酸度 = 0.98）。结果表明，镍浸渍不仅调节了酸位的浓度，而且调节了酸的类型。甲醇转化率最高 (99.9%)、轻烯烃选择性 (84%) 和 C5+ 选择性最低 (