离子交换的SAPO-18分子筛吸附甲烷中二氧化碳  

Adsorption and separation of CH4/CO2 by ion exchange SAPO-18 zeolite

作　　者：程思雨 胡云峰[1] CHENG Si-yu;HU Yun-feng(Northeast Petroleum University, Daqing 163318,China)

机构地区：[1]东北石油大学化学化工学院

出　　处：《化学工程师》2019年第6期79-82,共4页Chemical Engineer

基　　金：国家自然科学基金项目(51702044)

摘　　要：采用水热合成法,通过改变配方中硅含量和离子交换合成不同的SAPO-18(AEI结构)分子筛,实验采用XRD、扫描电镜(SEM)对SAPO-18(AEI结构)分子筛进行表征。采用"突破柱技术"对合成的分子筛进行CH4/CO2的选择性分离。实验结果表明,Na-SAPO-18比K-SAPO-18的吸附时间更长,表现出更好的吸附二氧化碳的能力。在一定限度内,随着硅含量的增加,产品化学吸附减少,且吸附时间变长,效果更好。SAPO-18(AEI structure)zeolites with different silicon content and ion exchange were synthesized by hydrothermal synthesis. The adsorbent was characterized by XRD and SEM. The selective separation of CH4/CO2 from the synthesized zeolite was carried out by"breakthrough column technology". The experimental results showed that Na-SAPO-18 has a longer adsorption time than K-SAPO-18, showing a better adsorption capacity for carbon dioxide. Within a certain limit, with the increase of silicon content, the adsorption time becomes longer and the effect is better.

关 键 词：水热合成法 分子筛 吸附 XRD SEM 

分 类 号：TQ424[化学工程]