选用ZSM-5分子筛为原料，采用水热晶化法，以硅烷类P为软模板剂、四丙基溴化铵为微孔结构导向剂，制备具有微介孔结构的P-ZS多级孔分子筛。进一步通过负载法、银盐或银氨配合物原位合成法等对P-ZS进行改性，制备出一系列银基改性P-ZS多级孔分子筛，并采用XRD、H₂-TPR、NH₃-TPD、Py-FTIR、氮气等温吸脱附测试等对其结构进行表征。结果显示，银氨原位合成法所得[Ag，Al]P-ZS多级孔分子筛比其他银引入方式所得改性分子筛结构更加稳定；与P-ZS相比，[Ag，Al]P-ZS比表面积、孔容及孔径等明显减小，但晶型和骨架结构未发生改变；[Ag，Al]P-ZS产生了强Lewis酸，酸性位点数量多，整体酸量明显增加。

P-ZS multistage porous molecular sieve with micro-mesoporous structure is prepared by using hydrothermal crystallization method,with ZSM-5 molecular sieve as raw materials,silane P as soft template agent and tetrapropylammonium bromide as microporous structure guide agent.A series of silver-based modified multistage porous P-ZS molecular sieves are prepared via modifying P-ZS molecular sieves by supporting method,and silver salt or silver ammonia complexes.in-situ synthesis method The samples are characterized by XRD,H₂-TPR,NH₃-TPD,Py-FTIR and nitrogen isothermal adsorption and desorption tests etc.It is shown that [Ag,Al] P-ZS molecular sieves obtained by in-situ synthesis of Ag ammonia has more stable structure than that obtained by other modification methods.Compared with P-ZS,specific surface area,pore volume and pore size of [Ag,Al] P-ZS decrease obviously,but its crystal shape and skeleton structure remains unchanged.A strong Lewis acid site appears in [Ag,Al] P-ZS,the number of acid sites on its increases,and the overall acid amount of it increases significantly.

吕存彬(1999-),男,本科,研究方向为煤及生物化工,3145774658@qq.com