四氯乙烷的吸附热力学和动力学研究  

THE THERMODYNAMICS AND DYNAMICS FOR THE ADSORPTION REMOVAL OF TETRACHLOROETHANE

作　　者：樊秀菊[1] 朱建华[1] 武本成[1] 赵向苗[1] 

机构地区：[1]中国石油大学化学工程学院,北京102249

出　　处：《石油炼制与化工》2011年第6期11-16,共6页Petroleum Processing and Petrochemicals

摘　　要：通过静态吸附实验,研究了四氯乙烷在吸附剂M上的吸附热力学和动力学特性。研究结果表明:四氯乙烷在吸附剂M上的吸附等温线属于典型的L型吸附曲线,吸附剂M对四氯乙烷的吸附符合Langmuir吸附等温方程,吸附可以自发进行,吸附过程为放热过程,属于物理吸附;吸附剂M对四氯乙烷的吸附动力学可用拟二级动力学方程描述,随温度升高,初始吸附速率以及吸附速率常数均呈现增大趋势。The thermodynamic and kinetic characteristics of adsorbing tetrachloroethane on adsorbent M were studied via static adsorption experiments. The experimental results show that the adsorp tion isotherm of adsorbing tetrachloroethane on adsorbent M is a typical L type adsorption curve, and this adsorption process agrees well with the Langmuir adsorption equation. The thermodynamic parame- ters illustrate that the absorption of tetrachloroethane on adsorbent M could happen spontaneously,it is an exothermic process attributed to physical adsorption. The dynamics of adsorbing tetrachloroethane on adsorbent M could be described by pseudo-second order kinetic equation. With the increase of adsorption temperature,the initial adsorption rate and adsorption rate constant exhibit an increase tendency.

关 键 词：四氯乙烷 吸附 热力学 动力学 

分 类 号：TE621[石油与天然气工程—油气加工工程]