二氧化硅膜的制备及分离CH_4/CO_2气体的研究  

Study on the Preparation of Silica Membranes for CH_4/CO_2 Separation

作　　者：张志刚[1] 张冰[1] 陈立峰[1] 李文秀[1] 

机构地区：[1]沈阳化工大学化学工程学院,沈阳110142

出　　处：《硅酸盐通报》2012年第1期56-61,共6页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金资助项目(No.21076126)

摘　　要：以正硅酸乙酯为前驱体,通过溶胶-凝胶法,采用多分离层镀膜工艺制备了用于分离CH4/CO2气体二氧化硅无机膜。通过TG-DSC、粒度分析仪及SEM对二氧化硅膜进行表征,结果表明分别利用HNO3、EtOH及DMF作为催化剂、助溶剂及添加剂可制备出表面性能较好的二氧化硅膜;利用多分离层镀膜工艺制备的二氧化硅膜,在0.025MPa下,对CH4/CO2气体的分离因子高达1.73,其效果明显高于利用单一溶胶涂膜的分离因子1.6,有效的提高了二氧化硅膜对气体的分离能力。Silicon dioxide inorganic membranes for CH4/CO2 separation was prepared by sol-gel method and multiple separation layers process,using tetraethoxysilane（TEOS） as precursor and characterized by TG-DSC,nano particle analyzer as well as SEM.The results indicated that the silicon membranes showed excellent surface properties,with HNO3,EtOH and DMF as catalyst,cosolvent and chemical additive respectively;for the process multiple separation layers,the results show that separation factor of ideal CH4/CO2 is as high as 1.73 for high-quality membranes,its effect is significantly higher than the separation factor 1.6 of a single sol,under 0.025 MPa.And the ability of silica membrane for the gas separation is improved.

关 键 词：分离因子 多分离层 二氧化硅膜 

分 类 号：O484[理学—固体物理]