通过水热合成法和离子交换法制备了负载Ni的介孔Ni-HZSM-5分子筛催化剂，采用XRD、SEM、EDX、FT-IR、N₂物理吸附-脱附等手段对催化剂组成、结构和形貌进行了研究，并以固定床微石英管反应器考察了不同反应温度、空速条件下介孔Ni-HZSM-5分子筛催化剂的乙烯齐聚反应性能。结果表明，Ni-HZSM-5样品具有介孔ZSM-5分子筛典型的特征结构，Ni进入分子筛骨架致使比表面降低，但孔径变大，更有利于齐聚反应的进行；在气体空速为1.2 L/（g·h）、反应温度为275℃时，乙烯的转化率为87.82%，C₄的选择性可达57.25%，C₆的选择性可达30.74%，说明Ni-HZSM-5催化剂对乙烯齐聚具有较好的催化性能。

The Ni-supporting mesoporous Ni-HZSM-5 molecular sieve catalyst is synthesized by using hydrothermal synthesis and ion exchange methods.The composition,structure and morphology of prepared catalyst are investigated by XRD,SEM,EDX,FT-IR and N₂ adsorption-desorption.The reaction performance of ethylene oligomerization over the prepared Ni-HZSM-5 molecular sieve catalyst is studied under different reaction temperatures and gas hourly space velocities (GHSV) in a fixed bed microquartz tube reactor.The results show that Ni-HZSM-5 samples have the same typical characteristic structure as mesoporous ZSM-5 molecular sieve.The specific surface area reduces slightly and pore size expands as Ni atoms embed in sieve frameworks,which is benefit to oligomerization.The conversion rate of ethylene can reach 87.82% with the selectivity rates of C₄ and C₆ being 57.25% and 30.74%,respectively under conditions that GHSV is 1.2 L/(g·h) and reaction temperature is 275℃.In summary,Ni-HZSM-5 catalyst has high catalytic performance for ethylene oligomerization.

龚畅(1992-),男,硕士研究生,主要研究方向为齐聚催化剂的制备,gcwit2015@163.com