Abstract: Pine needles were selected as typical biomass to investigate their pyrolysis kinetics. The thermogravimetric experiments were carried out on pine needles under an inert atmosphere with heating rates of 10, 30 and 50 K/min. There were two characteristic peaks in the mass loss rate curve, corresponding to the pyrolysis of hemicellulose and cellulose. Flynn-Wall-Ozawa (FWO) and Kissinger-Akahira-Sunose (KAS) methods were used to calculate the values of activation energy, which were 63.90-205.23 kJ/mol and 59.56-203.85 kJ/mol, respectively. The distributed activation energy model (DAEM) was used to calculate the value of the pre-exponential factor. The shuffled complex evolution (SCE) optimization algorithm was applied to optimizing the calculated parameters. The predicted values using the optimized pyrolysis kinetic parameters match the experimental data well. The developed multi-component biomass pyrolysis solver, which is named biopyrolysisFOAM, was used to further simulate the pyrolysis of pine needles. The optimized pyrolysis kinetic parameters were used as the initial parameters. The simulation results fit well with the experimental data at different heating rates.
Keywords: pine needle; pyrolysis kinetics; shuffled complex evolution(SCE) global optimization algorithm; OpenFOAM platform; numerical simulation
合肥工业大学学报自科版