在SAPO-17分子筛的合成母液中加入工业级HZSM-22分子筛，采用水热法制备了一系列不同HZSM-22质量分数的SAPO-17/HZSM-22复合分子筛。利用XRD、SEM、FT-IR、NH₃-TPD等手段对复合分子筛的微观结构和酸性进行表征，并考察其在甲醇制烯烃（MTO）反应中的催化性能。结果表明，HZSM-22的质量分数对复合分子筛的物化性质和MTO性能均具有较大影响。当添加质量占混合凝胶总质量的1/10时，SAPO-17/HZSM-22复合分子筛结晶度最高，形成部分粘连结构，且在MTO反应中复合分子筛催化剂的寿命较长，反应进行11 h时，其低碳烯烃选择性仍可保持在75%左右，丙烯/乙烯的比值为1.19。

A series of SAPO-17/HZSM-22 composite molecular sieves with different contents of HZSM-22 are prepared through hydrothermal method with adding industrial grade HZSM-22 molecular sieve into the synthetic mother liquor of SAPO-17 molecular sieve.The microstructure and acidity of the composite molecular sieves are characterized by XRD,SEM,FT-IR and NH₃-TPD,and their catalytic performances in methanol to olefins (MTO) reaction are investigated.The results show that the addition amount of HZSM-22 has a great influence on the physicochemical properties and catalytic properties of the composite molecular sieves.When the addition amount is 1/10 of the total amount,the SAPO-17/HZSM-22 composite molecular sieve has the highest crystallinity due to the formation of a partial adhesion structure,and its lifetime is lengthened in the MTO reaction.The selectivity of low carbon olefins can still be maintained at about 75% and the yield ratio of propylene to ethylene is 1.19 after the reaction over the 1/10 composite molecular sieves has performed 11 h.

张晓晓(1992-),女,硕士研究生,研究方向为分子筛的合成,2393058226@qq.com