Activation energy for oxygen chemisorption oil carbon at low temperatures

The kinetics of oxygen chemisorption on resin chars were investigated in th is study. The Elovich equation was employed to facilitate the interpretatio n of the chemisorption process. It was found that the activation energy for chemisorption is not constant and varies with surface coverage. This obser vation can be explained by a distributed kinetic parameter model, here impl emented as a distributed activation energy model. The energy distribution m odel reveals that the amount of mass uptake obtained in a typical chemisorp tion study does not involve full coverage of all of the active sites on car bon. It is concluded that the information on active sites obtained from low -temperature chemisorption cannot be directly applied to gasification at hi gher temperatures.