Iannello, S;
Bond, Z;
Sebastiani, A;
Errigo, M;
Materazzi, M;
(2023)
Axial segregation behaviour of a reacting biomass particle in fluidized bed reactors: experimental results and model validation.
Fuel
, 338
, Article 127234. 10.1016/j.fuel.2022.127234.
Preview |
Text
Iannello_1-s2.0-S0016236122040583-main.pdf Download (8MB) | Preview |
Abstract
Axial segregation behaviour of a single biomass particle in a lab-scale bubbling fluidized bed has been investigated from both experimental and modelling perspectives. Experiments were conducted using beech wood particles of different sizes, ranging from 8 to 12 mm under either oxidizing or inert conditions. The fluidized bed reactor was operated at temperatures and fluidization velocity ratios, U/Umf, in the range of 500–650 °C and 1–2, respectively. A one-dimensional model has been developed to predict the axial location of the particle over time, taking into account both dynamic and thermal conversion mechanisms. X-ray imaging techniques allowed to identify endogenous bubbles released during devolatilization and carry out direct measurements of their size. This information was used to propose an expression for the lift force acting on the fuel particle. The model showed very accurate predictions and the segregation behaviour of the fuel particle appeared to be independent of the nature of the fluidizing medium.
| Type: | Article |
|---|---|
| Title: | Axial segregation behaviour of a reacting biomass particle in fluidized bed reactors: experimental results and model validation |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.fuel.2022.127234 |
| Publisher version: | https://doi.org/10.1016/j.fuel.2022.127234 |
| Language: | English |
| Additional information: | This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third-party material in this article are included in the Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
| Keywords: | X-ray imaging, Fluidized bed, Thermal treatment, Endogenous bubbles, Biomass, Segregation |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10163192 |
Archive Staff Only
 |
View Item |
