An improved kinetic modelling of woody biomass gasification in a downdraft reactor based on the pyrolysis gas evolution

• New Aspen Plus/MATLAB kinetic model for the downdraft gasifier. Realistic representation of non-condensable gas release. The is validated against several woody biomass types. Prediction gasifier performance under different power loads. Biomass gasification technology evolving and more research through modelling alongside experimental work needs to be performed. In past, all attention has been concentrated on combustion reduction stages controlling reactions while pyrolysis modelled as an instantaneous process. this study, a new enhanced process in reactor proposed with realistic stage temperature-dependent sequential release gases. evolution gas, followed by reactions, are kinetically controlled which developed within Plus software package. simulation temperature profile carried out integrated MATLAB model. data obtained from types considering range scale predicted results very good agreement data, therefore can used confidence perform sensitivity analysis predict at load levels corresponding air flow rate 3–10 L/s. As supplied increases, LHV decreases but yield behaves conversely, turn cold efficiency maintained level energy conversion ? 70%. Furthermore, variation moisture content, commonly 5–25 % significant effect efficiency. Such that high content substantially reduces CO consequently produced gas. Hence, it important maintain lowest level.