Discussion on the effect of different heating rate and steam partial pressure on char gasification reactivity

Gasification reactivity of Shenhua coal char,Pingshuo coal char and Lu'an coal char were investigated by non-isothermal thermogravimetry in this paper.Effect of different heating rate and steam partial pressure on char gasification reactivity was analyzed.The larger the steam differential pressure was,the quicker the reaction rate was in the same reaction situations.The reaction rate was almost enhanced as the heating rate increased correspondingly.Gasification reactivity of samples was estimated by maximum reaction rate and half-life.Results indicated gasification reactivity order under same gasification process was: Shenhua char Pingshuo coal char Lu'an coal char,and the gasification reactivity of coal char decreased with the increase of coal rank.