Hi Rob,nI did ask few questions related to the heterogenous reactions in the previous posts in which it was char (solid carbon) reacting with the gas phase.nThis post is related to the coal devolatilization reaction in which the kinetics is different than other heterogenous reactions. Therefore, I created a new discussion. nThanks for your reply and for clarification of few doubts. nCan you look into question numbered (3) once and kindly let me know your thoughts on this.