CAJ | 학술논문

采用化学液相沉积（ CLD）技术将含有咪唑官能团的硅烷聚合物沉积在SAPO-34分子筛膜表面，修饰膜的缺陷以提高其气体渗透选择性.通过傅里叶红外（ FT-IR）、X-射线衍射（ XRD）和场发射扫描电子显微镜（ FE-SEM）等表征手段证明了硅烷聚合物以 Si—O—Si 共价键形式成功地接枝在膜表面.在298 K、0.1 MPa压力差的测试条件下，修饰后SAPO-34分子筛膜的CO2/CH4理想分离选择性由12提高到76，提高了5倍，CO2的渗透速率由7.22×10-7mol/（m2·s·Pa）降低至4.13×10-7 mol/（m2·s· Pa），降低了42.8％.考察了温度和压力差对SAPO-34分子筛膜的CO2和CH4渗透速率的影响.
채용화학액상침적（ CLD）기술장함유미서관능단적규완취합물침적재SAPO-34분자사막표면，수식막적결함이제고기기체삼투선택성.통과부리협홍외（ FT-IR）、X-사선연사（ XRD）화장발사소묘전자현미경（ FE-SEM）등표정수단증명료규완취합물이 Si—O—Si 공개건형식성공지접지재막표면.재298 K、0.1 MPa압력차적측시조건하，수식후SAPO-34분자사막적CO2/CH4이상분리선택성유12제고도76，제고료5배，CO2적삼투속솔유7.22×10-7mol/（m2·s·Pa）강저지4.13×10-7 mol/（m2·s· Pa），강저료42.8％.고찰료온도화압력차대SAPO-34분자사막적CO2화CH4삼투속솔적영향.
A siloxane polymer coating with the imidazole group was grafted on the surface of SAPO-34 membranes to patch the defects by chemical liquid deposition method. Characterizations including field emission scanning electron microscopy( FE-SEM),X-ray diffraction( XRD)and Fourier transform infrared spectroscopy( FT-IR),showed that siloxane polymers were coated on the surfaces of crystals and membrane by Si—O—Si covalent bond. The patched SAPO-34 membrane(S-M-2)showed an increased CO2/CH4 ideal selectivity by a factor of 5(from 12 to 76),and a decreased CO2 permeance by 42.8%[from 7.22 ×10 -7mol/(m2·s·Pa)to 4.13 ×10 -7 mol/(m2· s·Pa)]at 298 K and a pressure drop of 0. 1 MPa. Theinfluences of temperature and pressure drop on single CO2 and CH4 permeances through SAPO-34 membranes werealsostudied.