Integrated Particle- and Reactor-Scale Simulation of Pine Pyrolysis in a Fluidized Bed

Pecha, M. Brennan; Ramirez, Emilio; Wiggins, Gavin M.; Carpenter, Daniel; Kappes, Branden; Daw, Stuart; Ciesielski, Peter N.

doi:10.1021/acs.energyfuels.8b02309

Title: Integrated Particle- and Reactor-Scale Simulation of Pine Pyrolysis in a Fluidized Bed

Journal Article · Tue Sep 04 00:00:00 EDT 2018 · Energy and Fuels

DOI:https://doi.org/10.1021/acs.energyfuels.8b02309· OSTI ID:1471476

Pecha, M. Brennan ^[1]; Ramirez, Emilio ^[2];

^[2]; Carpenter, Daniel ^[1]; Kappes, Branden ^[3]; Daw, Stuart ^[2];

^[1]

National Renewable Energy Lab. (NREL), Golden, CO (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Colorado School of Mines, Golden, CO (United States)

We report results from a multiscale computational modeling study of biomass fast pyrolysis in an experimental laboratory reactor that combined the hydrodynamics predicted by a two-fluid model (TFM) with predictions from a finite element method (FEM) simulation of heat and mass transfer and chemical reactions within biomass particles. The experimental pyrolyzer consisted of a 2 in. (5.1 cm) diameter bubbling fluidized bed reactor (FBR) fed with milled pine pellets. The predicted FBR hydrodynamics included estimates of the residence times that the gas and biomass particles spend in the reactor before they exit. A single-particle FEM simulation was constructed on the basis of the geometry and heat transfer properties determined from optical and X-ray computed tomography measurements of wood and char particles collected from the experimental FBR, along with previously proposed pyrolysis reaction kinetics. Taken together, the combined TFM and FEM simulation results predicted net bio-oil yields at the reactor exit that agree well with experimental observations, without any arbitrary fitting parameters. As a result, the combined computational models also provided practical information about the most important reactor and feedstock parameters.

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Research Organization:: National Renewable Energy Lab. (NREL), Golden, CO (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE)

Grant/Contract Number:: AC36-08GO28308; AC05-00OR22725

OSTI ID:: 1471476

Alternate ID(s):: OSTI ID: 1507872

Report Number(s):: NREL/JA-2700-72403

Journal Information:: Energy and Fuels, Vol. 32, Issue 10; ISSN 0887-0624

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 31 works

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Title: Integrated Particle- and Reactor-Scale Simulation of Pine Pyrolysis in a Fluidized Bed

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