“…Because the distribution of the products such as char (C), gases (H 2 O, CO 2 , CO, CH 4 , H 2 ), and higher hydrocarbons (CH a O b ) is dependent on the previously mentioned variables, an assignment of the stoichiometric coefficients α to η can either be done by using pyrolysis models (e.g., Flashchain [6], CPD [7], FG-DVC [8]) or by dedicated pyrolysis experiments mimicking process conditions. Finally, it should be mentioned that the pyrolysis gross reaction in Equation (4.11) can be endothermic or exothermic (500 to -3500 kJ/kg(coal)) depending mainly on the rank of coal.…”