水存在条件下CO_2在多壁碳纳米管上吸入平衡研究  

A STUDY OF CO_2 SORPTION ON MULTIWALL CARBON NANOTUBES IN PRESENCE OF WATER

作　　者：孙艳[1] 刘聪敏[2] 苏伟[1] 周亚平[2] 周理[1] 

机构地区：[1]天津大学化工学院高压吸附实验室,天津300072 [2]天津大学理学院,天津300072

出　　处：《离子交换与吸附》2008年第6期551-556,共6页Ion Exchange and Adsorption

基　　金：973项目(2006CB705807-4);天津市应用基础研究计划面上项目(07JCYBJC00800)

摘　　要：实验测定了水存在条件下CO2在多壁碳纳米管上的吸入/分解等温线。等温线具有明显的跃升/下降点,标志着CO2水合物的生成/分解。结果表明,水存在条件下CO2的吸入量较干燥条件下有很大提高。然而,由于管内空间无法利用,CO2的吸入量并不高。从机理上对CO2的吸入行为进行了分析,并与CH4进行了比较。对水炭比对CO2吸入过程的影响以及H2O/CO2的摩尔比进行了测量和分析。Sorption/desorption isotherms of CO2 on multiwall carbon nanotubes were measured at 275K in the presence of water. Inflection of isotherms at a definite pressure indicates the formation of CO2 hydrates, which leads to much more CO2 uptake than without the presence of water. However, much less capacity than expected is observed due to the inaccessibility of the inner spaces. Sorption Behaviors of CO2 and CH4 are compared based on the sorption mechanism. Effect of water content on CO2 uptake is discussed in conjunction with the molar ratio of H2O/CO2 observed in experiments.

关 键 词：二氧化碳填埋 碳纳米管 水合物 吸附 

分 类 号：O647.311[理学—物理化学]