Prediction of gas composition in a downdraft gasifier from carob wood waste: A mathematical approach

Abstract

This work presents the tools for the development of a mathematical model that favors the calculation of the thermochemical processes that occur inside a downdraft gasifier and that allows predicting the composition of the gases generated at the exit of the reactor using wood waste of Carob tree from the thermophysical compo-sition of the biomass, the bed temperature and other properties. To do this, it uses the approach of the energy and species balance equations, using the finite difference numerical method, which achieves greater precision in the composition of the gas generated. This will allow the quality of the gas produced to be raised taking into account the increase in its caloric value and the decrease in its tar content are taken into account, based on the control of the kinetics of the reactions and also considering the size of the biomass.