摘要
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H_2/CO_2的分离选择性从1.45提高到6.20,CO_2的渗透率也高达1.76×10^(-7)mol/(m^2·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/（ m^2·s·Pa）.
出处
《现代化工》
CAS
CSCD
北大核心
2017年第9期119-122,共4页
Modern Chemical Industry
基金
武汉工程大学研究生教育创新基金项目(CX2015084)
