瓦斯组分在MCM-41介孔分子筛上的吸附分离特征  

Separation of gases on MCM-41 molecular sieve

作　　者：王水利[1] 葛岭梅[1] 

机构地区：[1]西安科技大学化学与化工学院,陕西西安710054

出　　处：《西安科技大学学报》2011年第4期383-387,共5页Journal of Xi’an University of Science and Technology

基　　金：国家自然科学基金项目(40772103)

摘　　要：矿井瓦斯中CH4与N2和CO2的有效分离是解决低浓度瓦斯回收利用的技术关键。为此,利用自制的吸附装置,研究了CH4,N2,CO2及其两相混合物在MCM-41介孔分子筛上的吸附、分离特征。结果表明,MCM-41对CO2的吸附选择性最好,CH4次之,N2最差。1∶1 mol两相混合气体吸附时,CO2/N2的分离系数最大,其次为CH4/N2,而CH4/CO2在测试压力下无有效分离作用;较低的吸附压力有利于CO2和N2以及CH4和N2的分离。The effective separations between CH4and N2, and CO2 is a key technology for the recoveryand utilization of the low-concentration gas. The adsorption and separation periormance of the CH4, N2 and CO2, and their two-phase mixtures on the MCM -41 molecular sieve are studied using the absorption-made device. The results showed that the adsorptive selectivity of the CO2on the MCM-41 is the best, the CH4 followed, and the N2 worst. For 1：1 mol two-phase mixed gas, the separation factor between CO2 and N2 is the largest, next to between CH4 and N2, and CH4 and CO2 can not be separated under the pressure. The lower pressure is conducive to the adsorption separation of CO2 and N2, andCH4 and N2 on the MCM -41.

关 键 词：MCM-41介孔分子筛 瓦斯组分 吸附分离 

分 类 号：TB32[一般工业技术—材料科学与工程]