Reactivity of coal gasification with steam and CO2

A description of the main parameters affecting char gasification, as well as an evaluation of the kinetic models used for describing the char gasification reaction, are presented. By reviewing literature on char gasification reactivity it is shown that of all the parameters involved in char gasification, the thermal history of the char, the pore structure and the coal chemical composition are those which present the most different results. The examination of reactive models indicates that their use depends mainly on their purpose in use.