Kinetics of n-butane adsorption by activated carbon
In this paper,activated carbon was prepared from sawdust,using chemical activation（the activation reagent was phosphoric acid）.The effects of the adsorption time,the n-butane flow and the temperature on the adsorption of the n-butane were investigated.The kinetics of adsorption at different temperature were studied as well.The experimental results show that the adsorption of the butane is a rapid physical process with adsorption and desorption coexisting.The flow of n-butane significantly influence adsorption rate and adsorption time,but it has little influence on the amount of n-butane adsorbed at equilibrium（qe）.The amount of n-butane adsorbed at equilibrium decreases with the increase of temperature.It indicates activated carbon adsorption of n-butane is a exothermic reaction.It is also found that the sorption kinetics are satisfied with Bangham equation with R20.99.The value of qe obtained through Bangham equation is very close to the value of experimental data.Therefore the ideal adsorption rate equation can be obtained by data fitting.
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万方数据
维普
