Assessment of a detailed biomass pyrolysis kinetic scheme in multiscale simulations of a single-particle pyrolyzer and a pilot-scale entrained flow pyrolyzer

TY - JOUR

T1 - Assessment of a detailed biomass pyrolysis kinetic scheme in multiscale simulations of a single-particle pyrolyzer and a pilot-scale entrained flow pyrolyzer

AU - Gao, Xi

AU - Lu, Liqiang

AU - Shahnam, Mehrdad

AU - Rogers, William A.

AU - Smith, Kristin

AU - Gaston, Katherine

AU - Robichaud, David

AU - Brennan Pecha, M.

AU - Crowley, Meagan

AU - Ciesielski, Peter N.

AU - Debiagi, Paulo

AU - Faravelli, Tiziano

AU - Wiggins, Gavin

AU - Finney, Charles E.A.

AU - Parks, James E.

N1 - Publisher Copyright: © 2021 Elsevier B.V.

PY - 2021/8/15

Y1 - 2021/8/15

N2 - A detailed biomass pyrolysis kinetic scheme was assessed in the multiscale simulations of a single-particle pyrolyzer with slow pyrolysis and a pilot-scale entrained flow pyrolyzer with fast pyrolysis. The detailed kinetic scheme of biomass pyrolysis developed by the CRECK group consists of 32 reactions and 58 species. A multiscale simulation model was developed, where the CRECK kinetics was employed to simulate biomass pyrolysis reactions, a one-dimensional particle model was utilized to simulate the intraparticle transport phenomena, and the particle-in-cell (PIC) model was employed to simulate the hydrodynamics. The multiscale model was first applied to simulate a single-particle pyrolysis experiment. The simulation with nonisothermal particles matched the experimental data better than the simulation with isothermal particles. Then the multiscale model was applied to simulate the pilot-scale entrained flow pyrolyzer. In this case, the simulation with isothermal particles matched the experimental data better than the simulation with nonisothermal particles. The reason for this difference might be that the kinetics itself already partially included the intraparticle transport effect as it was fitted using both TGA data (slow pyrolysis of small size biomass) and fluidized bed data (fast pyrolysis of relatively large size biomass). This study provides some insights into biomass pyrolysis kinetics development and pyrolyzer multiscale simulation for a future study.

AB - A detailed biomass pyrolysis kinetic scheme was assessed in the multiscale simulations of a single-particle pyrolyzer with slow pyrolysis and a pilot-scale entrained flow pyrolyzer with fast pyrolysis. The detailed kinetic scheme of biomass pyrolysis developed by the CRECK group consists of 32 reactions and 58 species. A multiscale simulation model was developed, where the CRECK kinetics was employed to simulate biomass pyrolysis reactions, a one-dimensional particle model was utilized to simulate the intraparticle transport phenomena, and the particle-in-cell (PIC) model was employed to simulate the hydrodynamics. The multiscale model was first applied to simulate a single-particle pyrolysis experiment. The simulation with nonisothermal particles matched the experimental data better than the simulation with isothermal particles. Then the multiscale model was applied to simulate the pilot-scale entrained flow pyrolyzer. In this case, the simulation with isothermal particles matched the experimental data better than the simulation with nonisothermal particles. The reason for this difference might be that the kinetics itself already partially included the intraparticle transport effect as it was fitted using both TGA data (slow pyrolysis of small size biomass) and fluidized bed data (fast pyrolysis of relatively large size biomass). This study provides some insights into biomass pyrolysis kinetics development and pyrolyzer multiscale simulation for a future study.

KW - Biomass

KW - CFD

KW - Kinetics

KW - MFiX

KW - Multiscale

KW - Pyrolysis

UR - http://www.scopus.com/inward/record.url?scp=85102631315&partnerID=8YFLogxK

U2 - 10.1016/j.cej.2021.129347

DO - 10.1016/j.cej.2021.129347

M3 - 文章

AN - SCOPUS:85102631315

SN - 1385-8947

VL - 418

JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

M1 - 129347

ER -