Experiment and CFD Investigation of Biochar Elutriation in Fluidized Bed

Liqiang Lu*, Cheng Li*, Steven Rowan, Bryan Hughes, Xi Gao, Mehrdad Shahnam, William A. Rogers

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

In fluidized bed biomass fast pyrolysis, the biomass is converted to biochar and elutriated. The elutriation rate is a key parameter in reactor designs and operations. This research presents a video-based continuous measurement of biochar elutriation rate in a fluidized bed with sands and biomass as bed materials. The fluidized bed is simulated with the computational fluid dynamics—coarse-grained discrete element method (CFD-CGDEM) in MFiX. The fluidization behavior of nonspherical sands can be more accurately captured when a rolling friction model is used. The predicted elutriation rate is close to the experimental measurement when the particle size distributions are considered and the filtered drag with a shape correction is used. These results validated the accuracy of the MFiX-based CFD framework for the prediction of biochar elutriations in the fluidized bed biomass fast pyrolysis reactor. © 2021 American Institute of Chemical Engineers.
Original languageEnglish
JournalAICHE Journal
DOIs
StatePublished - 26 Oct 2021

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