Euler–Lagrange/DEM simulation of wood gasification in a bubbling fluidized bed reactor--颗粒学报PARTICUOLOGY

Oevermann, M., Gerber, S., & Behrendt, F. (2009). Euler–Lagrange/DEM simulation of wood gasification in a bubbling fluidized bed reactor. Particuology, 7(4), 307–316. https://doi.org/10.1016/j.partic.2009.04.004

Euler–Lagrange/DEM simulation of wood gasification in a bubbling fluidized bed reactor

Michael Oevermann^*, Stephan Gerber, Frank Behrendt

Berlin Institute of Technology, School of Process Sciences and Engineering, Department of Energy Engineering, Fasanenstr. 89, 10623 Berlin, Germany

10.1016/j.partic.2009.04.004

Volume 7, Issue 4, August 2009, Pages 307-316

Received 6 October 2008, Accepted 15 April 2009, Available online 2 July 2009.

E-mail: michael.oevermann@tu-berlin.de

Highlights

Abstract

We present an Euler–Lagrange method for the simulation of wood gasification in a bubbling fluidized bed. The gas phase is modeled as a continuum using the 2D Navier–Stokes equations and the solid phase is modeled by a Discrete Element Method (DEM) using a soft-sphere approach for the particle collision dynamic. Turbulence is included via a Large-Eddy approach using the Smagorinsky sub-grid model. The model takes into account detailed gas phase chemistry, zero-dimensional modeling of the pyrolysis and gasification of each individual particle, particle shrinkage, and heat and mass transfer between the gas phase and the particulate phase. We investigate the influence of wood feeding rate and compare exhaust gas compositions and temperature results obtained with the model against experimental data of a laboratory scale bubbling fluidized bed reactor.

Graphical abstract

Keywords

Euler–Lagrange simulation; Discrete element method (DEM); Dense fluidized bed; Biomass gasification

文章导读