Modelling the ejection of primary aerosols during the fast pyrolysis of biomass anisotropic particles

Sánchez, Mario A.; Maya, Juan C.; Chejne, Farid; Pecha, Brennan; Quinchía-Figueroa, Adriana M.; Ruiz Márquez, Nevis A.; Ciesielski, Peter

doi:10.1016/j.biombioe.2024.107376

Modelling the ejection of primary aerosols during the fast pyrolysis of biomass anisotropic particles

Journal Article · Mon Sep 16 00:00:00 EDT 2024 · Biomass and Bioenergy

DOI:https://doi.org/10.1016/j.biombioe.2024.107376· OSTI ID:2448078

^[1]; Maya, Juan C. ^[2]; Chejne, Farid ^[2]; Pecha, Brennan ^[3]; Quinchía-Figueroa, Adriana M. ^[1]; Ruiz Márquez, Nevis A. ^[1]; ^[3]

Universidad EIA, Envigado (Colombia)
Universidad Nacional de Colombia-Sede Medellín (Colombia)
National Renewable Energy Laboratory (NREL), Golden, CO (United States)

A model for the fast pyrolysis of anisotropic biomass particles is presented which considers bubbling dynamics within the liquid intermediate phase (metaplast) and aerosol ejection from this phase. The model employs the population balance equation and the method of moments to estimate the production rate and resultant size distribution of aerosol ejections, incorporating a detailed CRECK reaction mechanism, and considers the effect of anisotropic biomass microstructure on the intraparticle transport of mass and energy. Here, this study investigates the impact of particle size, heating rate (heat transfer coefficient), and lignocellulosic composition on aerosol ejection. The model predicts that, at high heating rates (convective heat transfer coefficient of 359 W/m².K), aerosols can contribute over 20% to the heavy fraction yield in bio-oil for small particles (1 mm diameter, 4 mm length). The model can predict aerosol size distribution and surface area, indicating an average size of 20 μm for bubbles and 5 μm for aerosols during increased bubble production and aerosol ejection rates. These findings are consistent with prior experimental results and provide essential information for future modeling of extra-particle reactions of the aerosols as they progress through the reactor.

View Accepted Manuscript (DOE)

Research Organization:: National Renewable Energy Laboratory (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Bioenergy Technologies Office (BETO)

Grant/Contract Number:: AC36-08GO28308

OSTI ID:: 2448078

Report Number(s):: NREL/JA--2800-91243; MainId:93021; UUID:82914280-f5b1-463e-adc7-43fc04ffbe46; MainAdminId:73913

Journal Information:: Biomass and Bioenergy, Journal Name: Biomass and Bioenergy Vol. 190; ISSN 0961-9534

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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