No abstract

Article Highlights • Modeling of wood chips gasification in downdraft gasifier was carried out in ASPEN Plus • Due to the mathematical model development issues, three cases are considered and described • Experimental work was carried out within commercial small-scale CHP system • Multiple validation approach was applied for model verification Abstract A thermochemical equilibrium model is formulated for wood chips downdraft gasification. Steady state ASPEN Plus simulator was utilized to evaluate producer gas composition and low heating value. Three cases are considered, due to mathematical model developed issues, and described in details. Experimental work was carried out within commercial small-scale CHP system where twelve beech wood samples were taken. Equivalence ratio is between 0.32 and 0.38 and air-fuel ratio ranges from 1.49 to 1.81, when gasifier capacity is optimal, at 250 kW. Mole fractions of CO 2 , H 2 , CO, CH 4 and N 2 , in dry producer