甲醇驰放气在不同吸附剂中的吸附热力学

Thermodynamics on exhausted gas in various adsorbent agents

为提高焦炉煤气制甲醇过程产生驰放气的附加值,对CO2,CO,N2,CH4的4种气体在吸附剂上的吸附热力学展开了研究。测定了气体在特定温度下的吸附等温线,采用数学模型计算获得了相应的吸附焓。通过实验数据认为,随着吸附温度的提高,CO2,CO,N2,CH4吸附能力逐渐降低;随着吸附压力的提高,CO2,CO,N2,CH4吸附能力逐渐增强。炭分子筛对CO2吸附能力最好,吸附过程为物理吸附;铜吸附剂对CO吸附能力最好,吸附过程属于络合吸附;N2和CH4的吸附焓随吸附量变化始终保持为一个定值,吸附过程为物理吸附。

In order to improve exhausted gas value from coke oven gas for methanol process,the adsorption thermodynamics of CO2,CO,N2,CH4 were analyzed.The adsorption isotherms of gas were measured and adsorption enthalpy was calculated at certain temperatures.The results show that adsorption capacities of CO2,CO,N2 and CH4 decrease with the increasing of adsorption temperature,but increase as pressures increase.The best performance of adsorption on CO2 is carbon molecular sieve,and the process of this adsorption is physical adsorption.The best performance of adsorption on CO is copper-bearing adsorbent,and the process of this adsorption is complex absorption.The adsorption enthalpies of N2 and CH4 are a fixed value with the changes of adsorption capacity,and the process of this adsorption is physical adsorption.