离子液体AHNR_3与AOHNR_3的SO_2吸收解吸行为研究  

Study of SO_2 absorption/desorption behavior in ionic liquids AOHNR_3 and AHNR_3

作　　者：李学良[1] 席俊松[1] 汪华[1] 段体兰[1] 

机构地区：[1]合肥工业大学化学工程学院,安徽合肥230009

出　　处：《合肥工业大学学报（自然科学版）》2009年第11期1723-1726,共4页Journal of Hefei University of Technology：Natural Science

基　　金：安徽省2008年科技攻关计划资助项目(08010202124);合肥工业大学学生创新基金资助项目(XS08042)

摘　　要：文章研究了AOHNR3与AHNR32种离子液体的SO2吸收解吸行为,探讨了羟基对吸收的影响。在298.2 K下,含羟基的吸收剂AOHNR3吸收SO2的摩尔分数x(SO2)为55.2%,吸收剂AHNR3吸收x(SO2)为72.9%;在373.2 K条件下SO2解吸率高于96.0%,且循环性能稳定。与吸收剂AHNR3相比,AOHNR3能更快速地达到吸收平衡;2种离子液体吸收SO2具有高容量和快速的特点,可以在相对低的温度下吸收SO2,在比较高的温度下能有效地解吸,吸收和解吸过程可以循环操作并且吸收剂可以回收;因此,吸收剂AHNR3和AOHNR3可以作为SO2液态吸收剂,应用于含有SO2的气体纯化。The behavior of SO2 in ionic liquids AOHNR3 and AHNR3 was studied comparatively, and the effect of hydroxyl in AOHNR3 on absorption was discussed. The SO2 absorption fractions obtained at 298.2 K were 55.2% and 72.9% for the absorbents AOHNR3 and AHNR3 respectively. On the other hand, a thermal desorption recovery with the fraction of higher than 96.0% was achieved at 373.2 K with stable cycle performance. Absorption equilibrium can be reached more quickly in AOHNR3 than in AHNR3. These absorbents adsorbing SO2 at a relatively low temperature were effectively desorbed at higher temperatures with a high capacity and rate. The absorption and desorption process could be repeatedly operated, and thus the absorbents were reused. The absorbents AHNR3 and AOHNR3 showed a good potential application as the liquid-state SO2 absorbent in purification of gas containing SO2.

关 键 词：离子液体 SO2 吸收 解吸 循环 

分 类 号：O648[理学—物理化学]