以四乙基氢氧化铵（TEAOH）为模板剂，采用传统水热法合成粒径为纳米级SAPO-34分子筛。利用γ-甲基丙烯酰氧基丙基三甲氧基硅烷（KH-570）对载体表面进行改性，再用二次生长法在改性载体上成功制备出高性能SAPO-34分子筛膜。通过X-射线衍射（XRD）和扫描电子显微镜（SEM）对合成的SAPO-34分子筛以及SAPO-34分子筛膜进行表征。结果表明，制备出的SAPO-34分子筛膜连续致密，且结晶度高。对SAPO-34分子筛膜进行气体分离测试以评价其性能，在298 K，膜两侧压差为0.1 MPa条件下，SAPO-34分子筛膜对H₂/CO₂的分离选择性从1.45提高到6.20，CO₂的渗透率也高达1.76×10^-7 mol/（m²·s·Pa）。

The nano-scale SAPO-34 zeolites are synthesized by hydrothermal method using tetraethyl ammonium hydroxide (TEAOH) as structure directing agent.The surface of carrier is modified by γ-(methacryloyloxy) propyl trimethoxysilane (KH-570) and then high performance SAPO-34 zeolites membranes are prepared on the modified carrier through secondary growth method.The prepared SAPO-34 zeolite and SAPO-34 zeolite membrane are characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM).The results show that the prepared SAPO-34 membranes are continuous and compact,and of high crystallinity.The gas separation test is carried out for SAPO-34 zeolite membrane in order to evaluate its performance.At 298 K and a trans-membrane pressure of 0.1 MPa,the separation selective factor of SAPO-34 membranes against H₂/CO₂ increases from 1.45 to 6.20,and CO₂ permeability is also as high as 1.76×10^-7 mol/(m²·s·Pa).

李浩阳(1992-),男,硕士研究生,研究方向为沸石分子筛膜,462290770@qq.com