摘要
选取超高交联吸附树脂(H-resin)和大孔吸附树脂(M-resin)作为吸附剂,采用固定床吸附法研究了单、双组分的正戊烷和环己烷在2种不同孔结构吸附树脂上的吸附穿透特性.结果表明:2种吸附树脂对正戊烷和环己烷的吸附主要依靠色散力作用,吸附树脂对摩尔极化率大的环己烷有更优秀的吸附能力.双组分吸附实验中,由于富含微孔的H-resin对不同组分VOCs的吸附作用力差别大,发生环己烷取代正戊烷的现象,并且取代随环己烷浓度升高而更加显著,但吸附温度由30升至50℃过程中,取代现象减弱.M-resin的孔主要分布在中、大孔区,对环己烷和正戊烷的吸附作用力相近,因而正戊烷和环己烷在M-resin上始终为共同吸附.
In this work,adsorption breakthrough curves of single component and binary n-pentane and cyclohexane on hypercrosslinked polymeric resin(H-resin)and macroporous polymeric resin(M-resin)were investigated,respectively.The results showed that adsorption of n-pentane and cyclohexane on two polymeric resins was mainly based on the dispersion force.Polymeric resins exhibited the higher adsorption capacity for cyclohexane,which had a higher molar polarization.For adsorption of binary n-pentane and cyclohexane on H-resin,the phenomenon of"roll-up"(C/C0>1 for n-pentane)was observed in the breakthrough curves since H-resin had stronger adsorption affinity to cyclohexane than to n-pentane.Moreover,the higher the concentration of cyclohexane was,the more significant the"roll-up"was.In addition,the competition phenomenon became insignificant with increasing the adsorption temperature from 30 to 50℃.However,co-adsorption was always observed for binary adsorption of n-pentane and cyclohexane on M-resin because M-resin,whose pore was mainly distributed in the region of macropore and mesopore,had similar adsorption affinity to cyclohexane and n-pentane.
作者
余岩松
吴柳彦
刘慧娟
龙超
YU Yan-song;WU Liu-yan;LIU Hui-juan;LONG Chao(State Key Laboratory of Pollution Control and Resource Reuse,School of the Environment,Nanjing University,Nanjing 210023,China)
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2020年第5期1982-1990,共9页
China Environmental Science
基金
国家自然科学基金资助项目(51578281)。
