Study On Multicomponent Adsorption Of Organic Gases On Activated Carbon

Adsorption of organic gases on activated carbon is widely used. Compare with single component adsorption, the niulticomponent adsorption is more complex. Consideration of benzene, toluene and ethyl acetate usually exist in the waste gases of some industries, such as print, tan, paint. This study is forward to researching the multicomponent adsorption of benzene, toluene and ethyl acetate and optimizing the operating parameters of adsorption on activated carbon.The study indicates that single component adsorption equilibrium is good fit with Langmuir equation. For multicomponent adsorption, because of competition and interference of components, the component with high adsorption capacity can displace the adsorbed components. Thus the breakthrough curves of components changed. The breakthrough of the component with lower capacity is beforehand, and the breakthrough of the component with higher capacity postponed. The study calculates the capacity of multicomponent adsorption with E-L equation and fAST, and compares the results with the conclusions of experiments. The total capacity calculated by El equation or lAST is good fit with the conclusions of experiments. But the capacity of single component adsorption calculated by E-L equation has about 20% deviation. As a compare, the deviation of lAST is lower, about 10%.The study of operating parameters indicates that, when temperature nse. uas velocity excess or humidity increase, the capacity of adsorption decrease. The suitable operating parameters are: temperature less than 40 0C, gas velocity between 0.1 mis to 0.5m. s, humidity not exceeded 40 %. In this range, the relation of pressure dropped and gas velocity is generally according with Ergun equation...