Comparison of the kinetics of methanol adsorption in static and continuous flow conditions on activated carbons with different burn-off degree

The adsorption of methanol vapour on microporous carbons derived from the carbonization of coconut shell and activated in steam at 1123 K has been studied in a static mode over the relative pressure range 0–0.96 as well as in continuous flow conditions at temperatures close to ambient. The shape of the isotherm has been discussed and reveals mostly that the mode of acquisition has a negligible effect. In a second step, the kinetics constant rate of adsorption has been determined using a phenomenological mass transfer model (linear driving force). The results demonstrate that the adsorption is favour at low relative pressure (P/P0<0.2) under static conditions. This observation is connected to the evolution of the mean free path between the two mode of acquisition.