Intraparticle gas sampling during wood particle pyrolysis: Methodology assessment by means of thermofluidynamic modeling

摘要: Abstract An intraparticle sampling technique has recently been developed revealing the evolution of chemical species during biomass decomposition. The analysis shown that CO2 is produced up to 10% concentration at 200 °C, nearly coincidental with CO, which reaches a maximum 24% 325 °C. Subsequent release H2 0.7% approximately 300 °C. these gases coincides commensurate mass loss almost 70% between 225 °C and 350 °C. Continued decomposition results in reduction light as observed decline hydrogen concentrations sharp increase higher hydrocarbons. For example 440 °C are 17% 0.4%, respectively, while CH4, C2H6 C2H4 19%, 1.2% 0.8%, respectively. To complement this approach, thermo-fluid-dynamics process were assessed through numerical model based on finite volume method (fvm). suction force applied by microGC pump affects pressure distribution within particle. Nonetheless, demonstrates perturbing effect confined inner part In fact, absolute inside particle lower than 0.90, 0.95 0.99 atm only 1.28%, 4.47% 30.07%, interior volume. Therefore, utilizing choked-flow arrangement preferred when extracting released thermal