超临界条件下苯酚在NKA-Ⅱ树脂上的吸附相平衡  

ADSORPTION ISOTHERM OF PHENOL ON NKA-ⅡRESIN UNDER SUPERCRITICAL CONDITION

作　　者：谢兰英[1] 李忠[1] 奚红霞[1] 李祥斌[1] 

机构地区：[1]华南理工大学化学工程研究所,广东广州510640

出　　处：《化工学报》2002年第8期798-803,共6页CIESC Journal

基　　金：国家自然科学基金重点项目 (No .2 993 610 0 );广东省自然科学基金资助项目~~

摘　　要：测定了苯酚在常规条件 (以水作为流体 )下在极性、弱极性和非极性吸附树脂上的吸附等温线 ,研究了“苯酚 +NKA -Ⅱ树脂 +超临界CO2 ”体系的吸附相平衡关系 ,测定了苯酚在NKA -Ⅱ树脂上的超临界吸附等温线 ,考察了超临界条件下乙醇作为添加第三组分的对苯酚在NKA -Ⅱ树脂上的吸附等温线的影响 .结果表明 :苯酚在极性吸附树脂上的平衡吸附量要远大于在弱极性和非极性吸附树脂上的平衡吸附量 ,在超临界条件下 ,苯酚在树脂上的吸附量远小于在常规条件 (如水作为流体 )苯酚在树脂上的吸附量 ,而且乙醇的添加又将能改变超临界吸附相平衡 ,使苯酚在NKA -Ⅱ树脂上的平衡吸附量进一步减少 .In this work,the isotherms of phenol on polar,weakly polar and non-polar polym eric adsorption resins were determined.Fluid/solid adsorption phase equilibrium experiments under supercritical condition were conducted to determine the isothe rm of phenol on polar NKA-Ⅱ resin for system of 'phenol/NKA-Ⅱ resin/S CF CO 2' .The effect of addition of ethanol as the third component to the sys tem on the isotherms of phenol on the NKA-Ⅱ resin under supercritical condition was studied.Results showed that under normal conditions the equilibrium amount adsorbed of phenol on the NKA-Ⅱ resin was much more than those of phenol on the other two polymeric resins,and the equilibrium amount adsorbed of phenol on th e NKA-Ⅱ resin under the SCF condition was much less than that under the genera l conditions.The addition of ethanol to the supercritical systems could cause t he adsorption phase equilibrium of the supercritical systems to vary,which make s the equilibrium amount adsorbed of phenol on the resin decrease further.

关 键 词：超临界条件 NKA-Ⅱ树脂 超临界CO2 吸附平衡 苯酚 吸附等温线 高聚物树脂 分离 二氧化碳 

分 类 号：TQ028.32[化学工程]