微孔玻璃的制备及其吸附分离N_2/CO_2研究  

Preparation of Microporous Glass and Its Application to N_2/CO_2 Separation

作　　者：苏伟[1,2] 胡鹏[1] 付兴亮[1] 孙艳[3] 

机构地区：[1]天津大学化工学院,天津300072 [2]天津市膜科学与海水淡化重点实验室,天津300072 [3]天津大学理学院,天津300072

出　　处：《天津大学学报（自然科学与工程技术版）》2014年第10期923-927,共5页Journal of Tianjin University：Science and Technology

基　　金：国家自然科学基金青年基金资助项目(21206108);天津市应用基础与前沿技术研究计划资助项目(14JCYBJC21200)

摘　　要：吸附法脱除二氧化碳的关键在于开发高效的吸附剂．采用溶胶-凝胶法制备微孔玻璃，首先通过控制 pH 值、乙醇用量、温度等参数来得到适宜的干凝胶，干凝胶在高温下熔融形成玻璃体后，依次进行分相和酸浸析处理后得到微孔玻璃．结果表明：在pH值1～2、凝胶温度50℃、熔融温度1175℃条件下，可以得到孔径集中在0.7~2.0 nm的微孔玻璃；随着盐酸浓度的升高，微孔玻璃的平均孔径逐渐增大，而孔体积和比表面积则逐渐减小；微孔玻璃对 N2/CO2具有较高的吸附选择性，分离因子可达8.4以上．Adsorption separation processes are suitable for the separation of CO2, and the development of an efficient adsorbent to separate CO2 at ambient temperature is still a challenge to be faced. Microporous glass was synthesized by a sol-gel method. The dry gel was prepared by controlling the pH, ethanol amount, temperature and so on. Then, it was melted at a high temperature to get glass precursors and the micro pores were developed by phase separation and acid treatment. Results show that the pore size of microporous glass was mainly distributed from 0.7 nm to 2.0 nm when the pH was 1-2, the gel temperature was 50℃and the melting temperature was 1 175℃. Wider pores could be obtained with a higher concentration of hydrochloric acid. However, the pore volume and specific surface area were decreased. The microprous glass had a high adsorption selectivity for N2/CO2 and the separation factor was higher than 8.4.

关 键 词：溶胶-凝胶 微孔玻璃 吸附分离 CO2 

分 类 号：TQ171[化学工程—玻璃工业]