Accessibility, carbon dynamics control

Most of the catalytic applications of carbon materials deal with their use in processes carried out under dynamic conditions which are very different to those of static systems. In such processes the accessibility to the catalytically active sites or chemical functionalities is especially important because of the short contact times between the reactives and the carbon catalyst and the polymodal distribution of pores that they present [1]. A large proportion of their surface area and chemical surface groups resides in micropores [2] of diameters very close to the molecular dimension of the reactives and/or the products and so the reaction kinetics may be strongly diffusion controlled. 

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