1-甲基咪唑离子液体促进CO_2水合物生成实验探究  

Experimental research on carbon dioxide hydrate formation promoted by 1-methyl imidazole ionic liquid

作　　者：张琳[1] 徐小军[2] 周诗岽[1] 李工[2] 王树立[1] 李建敏[1] 

机构地区：[1]常州大学石油工程学院江苏省油气储运技术重点实验室,江苏常州213016 [2]常州大学石油化工学院,江苏常州213614

出　　处：《天然气化工—C1化学与化工》2013年第5期1-4,46,共5页Natural Gas Chemical Industry

基　　金：国家自然基金项目资助(编号:51176015)

摘　　要：为解决水合物法捕获封存CO2技术中水合物反应生成速率慢、储气密度低等难题,自主合成了一种含有表面活性基团的1-甲基咪唑类离子液体水合物促进剂,探究其对CO2水合物的生成促进作用。采用高压磁动力搅拌反应釜,在静态和搅拌体系下,研究了在合成的离子液体的水溶液中CO2水合物的反应速率、反应时间、气体消耗量及其对水合物生成过程的影响,并与SDBS进行对比分析,阐述了促进剂对水合物生成促进的动力学机理。实验结果表明,1-甲基咪唑离子液体可缩短诱导时间,提高水合物生成速率和储气量,其最佳反应浓度为0.1g/L,远低于SDBS对应的0.7g/L,且促进效果比SDBS好,6℃时,CO2水合物的反应生成速率提高了12.5%。To solve the problem of low formation rate and low gas storage density of the technology for carbon dioxide capture by hydrate, a novel 1-methyl imidazole ionic liquid containing the surface active group was synthesized and used as an additive to study its effect on promoting the formation of carbon dioxide hydrate. Experiments of hydrate formation in the aqueous solution system with the synthesized ionic liquid promoter were conducted in a high pressure magnetic force stirring reaction kettle under stationary and stirring conditions, respectively, and the hydrate formation rate, reaction time, gas consumption and their impact on the formation process of hydrate were investigated. A compm＇ison with sodium dodecyl benzene sulfonate （SDBS） promoter was made, and the dynamic mechanism of the additive promoting hydrate formation was analyzed. The experimental results showed that the 1-methyl imidazole ionic liquid could shorten the induction time of hydrate formation and heighten formation rate and gas storage capacity, and its optimum dosages was 0.1 g/L, which was much less than 0.7 g/L of SDBS, furthermore, its promoting effect was better than that of SDBS, and at 6℃, hydrate formation rate could increase by 12.5%.

关 键 词：二氧化碳 水合物 生成促进剂 1-甲基咪唑 离子液体 

分 类 号：TQ047.1[化学工程]