INFLUENCE OF THE INCREASE OF HYDROGEN AND OXYGEN IN THE MINIMUM FORMULA OF SACCHARUM SPONTANEUM ENERGY CANE BIOMASS AND ITS EFFECTS ON THE YIELD OF PYROLYSIS PRODUCTS IN A NATIONAL PROCESS SIMULATOR (DWSIM)

This work aims to evaluate the influence of hydrogen and oxygen increase in the minimum formula of the energy cane Saccharum spontaneum on the pyrolysis products at 450 C and 40 bar, to achieve a greater bio-oil yield. This work adopted DWSIM 6.4.9 with a stoichiometric reactor and a minimum formula for the biomass (CH1.75O0.84). The simulations considered the sub-index varying individually between 1.0-5.0 for hydrogen, and between 0.5-2.5 for oxygen, with increments of 1.0 and 0.5, increasing its molar mass between 26.44 g/mol-30.44 g/mol and 21.75 g/mol-53.75 g/mol, respectively. By varying hydrogen, liquid yields increased (51.79%-53.57%), gas yields decreased (32.20%-29.46%), and solid yields remained practically constant (26.01%-26.97%). Regarding the oxygen, gases decreased (36.66%-21.42%) and solids and liquids increased more significantly (24.61%-30.62% and 48.73%-57.96%). Finally, the oxygen increment in the biomass lowered CO and CO2 fractions (1.38-0.53 and 0.88-0.33) kg/h, respectively, and the presence of water-gas shift reaction increased CO2 fraction (0.04-0.08).