Kinetic study on metallurgical coke gasification by steam under various pressures

Abstract

Kinetics of metallurgical coke gasification by steam has been researched via a pressurized thermogravimetric analyzer under elevated pressures. The influences of total pressure and steam partial pressure upon gasification reactivity have been investigated. Three typical kinetic models, i.e., grain model, homogeneous model, and random pore model, have been used to simulate the reaction behavior. Concluded to be the model supplying the optimal fit to experimental data, the RPM was selected to obtain kinetic parameters. The nth-order equation is fit to depict the relationship between the gasification reactivity and the partial pressure of steam. That activation energies evaluated under various pressures are approximate to each other suggests that reaction mechanisms corresponding to these activation energies are alike.