1-06　A study of coal char gasification model based on the change of the carbon structure during gasification reaction

Abstract

The development of pore structure of char during gasification was evaluated using TG gasification profiles and Raman spectroscopy of KZ char. The pore structure of char during CO₂ gasification reflected the initial one because CO₂ gasification proceeds on the pore surface. In contrast, the pore structure during steam gasification was developed probably owning to the growth of aromatic structures by H radicals and selective small aromatic consumption. These different mechanisms of pore structure development imply the difference of gasification reaction mechanisms.