Reactivity enhancement by molecular traffic control

For two decades, the concept of reactivity enhancement by "molecular traffi c control" has been controversially discussed, According to this concept, e ffective reactivity in zeolite catalysis may be enhanced if reactant and pr oduct molecules do not interfere with each other on their diffusion paths. As a major deficiency of this concept, so far no clear criteria for the occ urrence of this effect are known, Considering a network of channels with si ngle-file confinement and selective adsorption affinity to either the react ant or the product molecules, a model is introduced in which the possibilit y of reactivity enhancement may be rigorously demonstrated. (C) 2000 Academ ic Press.