Influence of initial assumptions on the kinetic models of CO gasification of chars and cokes in solid phase.

Kinetic studies of CO gasification of different materials were carried out using the Geneva method in an apparatus for determining the reactivity of cokes. The main purpose of these studies was parallel analysis of the Boudouard-Bell (B-B) reaction progress on the basis of both solid-phase and gaseous products combined with the mass balance of the process. The kinetic equations involve the conversion degree of the solid ( x) or gaseous phase (α) with the kinetic reaction rate constant. It was proved that the mathematical form of the mass balance is similar to the simplest kinetic equation, in which the kinetic constant k is replaced by the known process constant C. Complete kinetic description of the B-B reaction is determined by adopting initial conditions and taking into account the chemical reaction that occurs in a short time interval. [ABSTRACT FROM AUTHOR]