Coupling particle scale model and SuperDEM-CFD for multiscale simulation of biomass pyrolysis in a packed bed pyrolyzer

TY - JOUR

T1 - Coupling particle scale model and SuperDEM-CFD for multiscale simulation of biomass pyrolysis in a packed bed pyrolyzer

AU - Gao, Xi

AU - Yu, Jia

AU - Lu, Liqiang

AU - Rogers, William A.

N1 - Publisher Copyright: © 2021 American Institute of Chemical Engineers

PY - 2021/4

Y1 - 2021/4

N2 - An efficient biomass pyrolysis process requires a comprehensive understanding of the chemical and physical phenomena that occur at multi-length and time scales. In this study, a multiscale computational approach was developed and validated for biomass pyrolysis in a packed-bed reactor by integrating pyrolysis kinetics, a particle scale model, and Superquadric Discrete Element Method-Computational Fluid Dynamics (SuperDEM-CFD) in open-source code MFiX. A one-dimensional particle–scale model that discretizes the characteristic length of biomass particle into layers was developed to predict the intraparticle phenomena inside a single particle. The 1D model was validated by comparing it with a single biomass particle pyrolysis experiment. A recently developed SuperDEM-CFD model was employed to simulate the non-spherical particle–particle contact and fluid-particle interaction. The coupled model was applied to simulate the pyrolysis of cubic biomass particles in a packed bed and validated by comparing with experimental data. Simulation with and without particle–scale model was compared, and the effect of the gas–solid heat transfer models was also investigated.

AB - An efficient biomass pyrolysis process requires a comprehensive understanding of the chemical and physical phenomena that occur at multi-length and time scales. In this study, a multiscale computational approach was developed and validated for biomass pyrolysis in a packed-bed reactor by integrating pyrolysis kinetics, a particle scale model, and Superquadric Discrete Element Method-Computational Fluid Dynamics (SuperDEM-CFD) in open-source code MFiX. A one-dimensional particle–scale model that discretizes the characteristic length of biomass particle into layers was developed to predict the intraparticle phenomena inside a single particle. The 1D model was validated by comparing it with a single biomass particle pyrolysis experiment. A recently developed SuperDEM-CFD model was employed to simulate the non-spherical particle–particle contact and fluid-particle interaction. The coupled model was applied to simulate the pyrolysis of cubic biomass particles in a packed bed and validated by comparing with experimental data. Simulation with and without particle–scale model was compared, and the effect of the gas–solid heat transfer models was also investigated.

KW - CFD-DEM

KW - MFiX

KW - biomass

KW - non-spherical

KW - pyrolysis

KW - superquadric

UR - http://www.scopus.com/inward/record.url?scp=85099093213&partnerID=8YFLogxK

U2 - 10.1002/aic.17139

DO - 10.1002/aic.17139

M3 - 文章

AN - SCOPUS:85099093213

SN - 0001-1541

VL - 67

JO - AICHE Journal

JF - AICHE Journal

IS - 4

M1 - e17139

ER -