TY - JOUR
T1 - Coupling coarse-grained DEM-CFD and intraparticle model for biomass fast pyrolysis simulation and experiment validation
AU - Wang, Bing
AU - Dai, Jianjian
AU - Li, Sijie
AU - Lin, Yixi
AU - Patrascu, Michael
AU - Gao, Xi
N1 - Publisher Copyright:
© 2024 American Institute of Chemical Engineers.
PY - 2024
Y1 - 2024
N2 - The understanding of complex fluidization hydrodynamics and chemical reactions in biomass fast pyrolysis fluidized bed reactors is lacking and requires further investigation. It is urgent to develop accurate mathematical models capable of describing the complex multiphase reaction system of biomass pyrolysis. A comprehensive multiscale model based on coarse-grained discrete element method (DEM)-computational fluid dynamics (CFD) was developed in open-source MFiX code. It incorporates detailed biomass pyrolysis kinetics and an intraparticle model. To validate the model, measurements were conducted in a fluidized bed pyrolyzer, including quantifying the segmental pressure drop along the height of the bed and determining the yields and compositions of gas, liquid, and solid products. The particle mixing and segregation, axial distribution and residence time, Lacey index, and pyrolysis products were investigated. The study provides experimental and theoretical foundations for designing multiphase fluidized bed reactors and advancing biomass thermochemical conversion.
AB - The understanding of complex fluidization hydrodynamics and chemical reactions in biomass fast pyrolysis fluidized bed reactors is lacking and requires further investigation. It is urgent to develop accurate mathematical models capable of describing the complex multiphase reaction system of biomass pyrolysis. A comprehensive multiscale model based on coarse-grained discrete element method (DEM)-computational fluid dynamics (CFD) was developed in open-source MFiX code. It incorporates detailed biomass pyrolysis kinetics and an intraparticle model. To validate the model, measurements were conducted in a fluidized bed pyrolyzer, including quantifying the segmental pressure drop along the height of the bed and determining the yields and compositions of gas, liquid, and solid products. The particle mixing and segregation, axial distribution and residence time, Lacey index, and pyrolysis products were investigated. The study provides experimental and theoretical foundations for designing multiphase fluidized bed reactors and advancing biomass thermochemical conversion.
KW - biomass pyrolysis
KW - fluidized bed reactor
KW - MFiX
KW - multiscale modeling
KW - nonisothermal particle
UR - http://www.scopus.com/inward/record.url?scp=85187442021&partnerID=8YFLogxK
U2 - 10.1002/aic.18393
DO - 10.1002/aic.18393
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AN - SCOPUS:85187442021
SN - 0001-1541
JO - AICHE Journal
JF - AICHE Journal
ER -