4A磁性分子筛的制备及吸附性能研究  

Preparation and adsorption properties of 4A magnetic molecular sieve

作　　者：曹研彦 李裕[1] 薛泽慧 汪林林[1] 

机构地区：[1]中北大学化工与环境学院,山西太原030051

出　　处：《化学研究与应用》2016年第2期271-275,共5页Chemical Research and Application

摘　　要：以尖晶石结构的铁酸镍为磁性载体,采用溶胶-凝胶法制备易于固–液分离的4A磁性分子筛。采用傅里叶变换红外光谱仪(FT-IR)、X射线衍射仪(XRD)、扫描电子显微镜(SEM)、振动样品磁强计(VSM)、N2吸附-脱附测试仪等对样品进行了表征。4A磁性分子筛是Ni Fe2O4和4A分子筛的复合颗粒,粒径在1.8-2μm,比表面积在300-500cm2/g,具有超顺磁性。20%-30%的4A磁性分子筛稳定性和磁回收率较好,静态吸附测试表明磁含量影响分子筛对高浓度乙醇中微量水的吸附。Freundlich模型对静态吸附数据的拟合度高。The easy to solid-liquid separation magnetic 4A molecular sieve particles were successfully pre-pared by sol-gel process using nickelferrite with spinel structure as magnetic carrier.The samples were cha-racterized with fourier transform infrared spectroscope（ FTIR）,X-ray diffractometer（ XRD）,scanning electronmicroscope（ SEM）,vibrating sample magnetometer（ VSM）,and N2adsorption-desorption.The magnetic 4A mol-ecular sieve particles were Ni Fe2O4/ 4A composite particles,particles size were between1. 8-2μm,specific sur-face area were 300-500cm^2/ g,have super paramagnetism. The stability and magnetic recovery of 20%-30%magnetic 4A molecular sieve particles were satisfactory,magnetic content affect the adsorption of trace w-ater in high concentration of ethanol.The Freundlich model are adopted to simulate the static adsorption data.

关 键 词：4A磁性分子筛 吸附线等温 乙醇 微量水 吸附＊ 

分 类 号：TQ424.25[化学工程]