kinetics of the non-isothermal desorption of ethanol absorbed onto cms-3a

The kinetics of the desorption of ethanol previously absorbed onto carbon molecular sieves (cms-3a) was studied using the non-isothermal thermogravimetric technique. the dependence of activation energy (ea,α) for a particular degree of desorption (α) was established. it was confirmed that the non-isothermal desorption of ethanol was a kinetically complex process. a novel mathematical model for the kinetics of non-isothermal desorption for the absorbed ethanol is established. this model is based on the proposed dependence of the specific desorption rate on time/temperature. the correlation dependences of the model parameters β and η on heating rates were established. a general kinetic equation for the non-isothermal desorption of ethanol was developed. it was found that the specific desorption rate at every single heating rate increases, whereas ea, decreases during the desorption process.