论文部分内容阅读
在多孔α Al2 O3 载体上 ,采用喷涂方法引入一层晶种 ,再用水热法合成出渗透量大、气体选择分离系数高的ZSM 5沸石膜 ;对影响ZSM 5沸石膜合成的主要因素进行了考察 ,并用XRD ,SEM及单组分气体渗透性能测定对所合成的沸石膜进行了表征 .结果表明 ,所合成的沸石膜是典型的ZSM 5沸石膜 ,膜表面晶粒排列有序 ,整齐地连成一致密层 ,绝大部分晶粒的取向一致 ,无较大裂缺存在 .经一次合成的沸石膜的H2 渗透率可达 2 70 μmol/(s·m2·Pa) ,H2 /C3H8理想分离系数达 14以上 .喷涂液SiO2 浓度、晶种浓度及晶种质量对沸石膜合成的影响较大
On the porous α Al 2 O 3 support, a layer of seeds was introduced by spraying method, and then a ZSM 5 zeolite membrane with large permeation and high selectivity of gas separation was synthesized by hydrothermal method. The main factors influencing the synthesis of ZSM 5 zeolite membranes were investigated The zeolite membranes were characterized by XRD, SEM and single-component gas permeation test.The results showed that the zeolite membrane was a typical ZSM 5 zeolite membrane with ordered and neat grains Even with a dense layer, most of the grains are oriented in the same direction without any major cleavage.The H2 permeation rate of the zeolite membrane synthesized in one time can reach 2 70 μmol / (s · m2 · Pa) and H2 / C3H8 Separation factor of more than 14. Spraying solution SiO2 concentration, seed concentration and seed quality zeolite membrane synthesis greater impact