The effect of chemical displacement of B species in the reaction A+B→B

The non-Markovian binary kinetic equations of the irreversible reaction A+B→B taking into account B reactant displacement due to chemical conversion events have been derived for the first time. The derivation is based on the many-particle closure method recently proposed by the authors. It is shown that a conventional view of the reaction A+B→B as a pseudomonomolecular reaction is true only for spatially uniform systems. In the case of spatially non-uniform systems additional macroscopic flows arise. They can transform an originally uniform distribution of one of the species into a non-uniform one in the course of the reaction.