【摘要】 利用浸渍提拉方法,在平均孔径500 nm的管状α-Al₂O₃陶瓷管载体上成功制备了无缺陷的Beta/碳纳米复合分子筛膜．通过室温下单组分气体渗透实验,发现当Beta分子筛在聚糠醇/丙酮溶液中的含量逐渐加大时,复合膜的气体分离因数略有增加,同时气体渗透通量明显加大．经优化后氢气渗透通量比纯碳膜增加了一个数量级,说明Beta分子筛起到了加快气体渗透通量的作用．由SEM照片可以发现,随着Beta分子筛含量的增加,制备的纳米复合膜的厚度由平均14μm减少到7μm左右,从而减少了气体渗透的阻力．结合实验数据,探讨了沸石分子筛/碳复合膜气体渗透路径．更多还原

【Abstract】 A novel Beta-zeolite/carbon nanocomposite membrane has been prepared on a porousα-Al₂O₃ substrate by dip-coating.By single component gas experiments at room temperature,the Beta-zeolite/carbon nanocomposite membrane exhibits hydrogen permeations that are one order of magnitude higher than pure carbon membrane with comparable permselectivities.It shows that Beta-zeolite acts as high gas permeable phase in membranes.From the SEM images,when the amount of Beta-zeolite is increased,the thickness of nanocomposite membrane is reduced from 14μm to 7μm,which is helpful to decrease the resistance of gas permeance. Finally,the pathway through nanocomposite membrane is inferred by the experimental data and SEM images.更多还原