中文摘要：

采用外延生长法合成了ZSM-5/SAPO-34复合分子筛,并通过浸渍法用金属离子Zn和Ga对其进行了改性。利用X射线衍射（XRD）、扫描电镜（SEM）、吡啶-原位傅里叶红外变换光谱（Py-IR）、氨气程序升温脱附（NH_3-TPD）、氮气吸附脱附（BET）等手段对制备的分子筛样品进行了表征,并对催化剂进行了甲醇芳构化催化性能评价。结果表明,在复合分子筛的基础上,加入金属使分子筛的比表面积和孔容减小,且双金属改性可有效调整分子筛表面L/B酸比例,明显提高了分子筛在甲醇芳构化中的催化活性和选择性。

英文摘要：

Zn and Ga modified ZSM-5/SAPO-34 composite molecular sieves were prepared by the method of two-step crystallization, and characterized by XRD, SEM, PY-IR, NH3-TPD and BET. Their catalytic performances in the aromatization of methanol were evaluated. The results show that modifying the ZSM-5/SAPO-34 molecular sieves by Ga and Zn could not only reduce the surface area and pore volume of the molecular sieves, but also effectively regulate and control the L/B acid ratio on the surface of molecular sieves and obviously increase catalytic activity in the aromatization of methanol.