离子液体强化二氧化碳水合物生成实验研究

Experimental study on carbon dioxide hydrate formation strengthened by ionic liquid

实验研究了搅拌体系下离子液体1-（3-磺酸基）丙基-3-甲基咪唑十二烷基磺酸盐（[MIMPS] DBSA）、1-（3-磺酸基）丙基哌啶十二烷基苯磺酸盐（[PIPS] DBSA）、1-（3-磺酸基）丙基吡咯烷十二烷基苯磺酸盐（[PYPS] DBSA）、鼠李糖脂（Rha-C10-C10）在2～10℃内对CO2水合物生成的影响.结果表明,上述试剂对CO2水合物生成相平衡压力的影响受到温度及浓度的双重影响.[MIMPS] DBSA、[PIPS] DBSA、[PYPS] DBSA、Rha-C10-C10降低CO2水合物相平衡压力最大幅度分别为16.4％、10.8％、17.0％、16.0％,促进CO2水合物生成最佳质量分别为100、500、500、500 mg/kg.最后,计算了各个最佳浓度化学试剂体系CO2耗气量,发现[MIMPS] DBSA、[PIPS] DBSA、[PYPS] DBSA、Rha-C10-C10增大CO2耗气量最大幅度分别为31.9％、32.5％、48.9％、33.1％.

The CO2 hydrate formation under stirring conditions is studied in the aqueous solution system strengthened by ionic liquid in a high pressure magnetic force stirring reactor. The effects of ionic liquids such as [MIMPS] DBSA, [ PIPS] DBSA, [ PYPS] DBSA and Rha-C10-C10 on the hydrate formation at 2 - 10℃ are performed. The results show that hydrate formation strengthened by ionic liquid is influenced by temperature and concentration. The phase equilibrium pressure of hydrate formation in presence of MIMPS ~ DBSA, [ PIPS ] DBSA, PYPS ] DBSA and Rha- Clo-C10 is decreased by 16.4%, 10. 8%, 17.0% and 16. 0%, respectively. And their corresponding optimum concentrations are 100 mg/kg, 500 mg/kg, 500 mg/kg and 500 mg/kg, respectively. At last, CO2 gas consumptions in [MIMPS] DBSA, [ PIPS] DBSA, [ PYPS] DBSA and Rha-Ci0-Ci0 solution system are also calculated. The CO2 gas consumptions are increased by MIMPS ] DBSA, [ PIPS ] DBSA, [ PYPS ] DBSA and Rha-Clo-C10 for 31.9% , 32. 5% , 48.9% and 33.1% ,respectively.