氧化铝陶瓷管负载TS-1沸石膜的制备及表征

Preparation and Characterization of TS-1 Zeolite Membrane Supported on Alumina Tube

利用二次晶种生长法在α-Al2O3陶瓷管上制备TS-1沸石膜,详细研究了晶化时间对TS-1沸石膜表面形貌、沸石层厚度、沸石生长速率及气体渗透性能的影响。通过扫描电子显微镜(SEM),X-射线衍射仪(XRD),红外光谱(FTIR)、紫外光谱(UV-Vis)及N2渗透测试对TS-1沸石膜进行了全面表征。研究结果表明:随着晶化时间的延长,TS-1膜层表面沸石粒子互生性增强,且膜层厚度也随之增加。然而,随着沸石层厚度的增加,其气体传输性能下降。当晶化时间为48 h,沸石生长速率最快,为0.087μm/h,此时TS-1沸石膜厚度为4μm,表面平整,无明显缺陷。

TS-1 zeolite membranes were prepared on α-A1203 tubes by seeded secondary growth method. Effects of crystallization time on the surface morphology, membrane thickness, membrane growth rate and permeation performance of the resulted TS-1 membranes were investigated in detail. Moreover, the zeolite membranes were characterized by scanning electron microscopy （SEM）, X-ray diffraction （XRD）, Fourier Transform infrared spectroscopy （ FT-IR）, UV-vis spectroscopy and N2 permeation test. Results show that thickness of the zeolite membrane N2 permeance decreased when prolonged the increased with increasing crystallization time. However, the crystallization time. The highest average membrane growth rate of 0.087 μm/h was obtained on the 4 μm thick TS-1 membrane synthesized for 48 h. Under the condition, the surface of TS-1 membrane was smooth and no obvious defects could be observed.