高剪切反应器中有机相强化KHCO_3/K_2CO_3溶液吸收CO_2研究

Study on CO_2 absorption into KHCO_3/K_2CO_3 solution intensified by organic phase in a high shear reactor

在高剪切反应器(HSR)中研究了不同有机分散相对KHCO_3/K_2CO_3溶液吸收CO_2的强化效果,并考察了有机相与有机胺溶液复配使用对CO_2吸收率的影响。实验结果表明:环己烷、正庚烷对KHCO_3/K_2CO_3溶液吸收CO_2的强化效果明显,甲苯、正辛醇对KHCO_3/K_2CO_3溶液吸收CO_2则没有明显的强化效果;CO_2吸收率随HSR转速的增加而增加,随气液比、温度的增加而降低;环己烷对加入二乙醇胺活化的K_2CO_3溶液有较为明显的强化作用,CO_2吸收率最高可提高23%。与文献中不同反应器的对比表明HSR对CO_2具有较高的吸收效率。

The intensification effect of different organic phases on the absorption of CO2 by KHCO3/K2CO3 solution in a high shear reactor(HSR) was investigated, and the combined effect of organic phase with organic amine on CO2 absorption was also studied. The experimental results showed that cyclohexane and n-heptane exhibited significant intensification effect on the absorption of CO2 by KHCO3/K2CO3 solution, while the intensification effect of toluene and n-octanol on CO2 absorption by KHCO3/K2CO3 solution was negligible. CO2 absorption percentage increased with the increase in the rotation speed of HSR and decreased with increasing gas-liquid ratio and temperature. CO2 absorption by diethanolamine-activated K2CO3 solution was significantly enhanced by the addition of cyclohexane, with an increase of CO2 absorption percentage up to 23%. HSR demonstrated a high efficiency for CO2 absorption by a comparison with other reactors in the literature.