CFD-DEM study of biomass gasification in a fluidized bed reactor: Effects of key operating parameters

Shuai Wang and Yansong Shen

Renewable Energy, 2020, vol. 159, issue C, 1146-1164

Abstract: Biomass gasification in a fluidized bed reactor is a complex process involving intricately multi-scale and multi-physics processes and may be affected by many operating parameters. In this work, it is numerically investigated at particle scale using a coupled Computational Fluid Dynamics-Discrete Element Method (CFD-DEM) approach. The flow dynamics, turbulence, heat transfer via convective, conductive, and radiative paths, and heterogeneous and homogeneous reactions are considered. The effects of key operating parameters on gasification performance are studied in terms of biomass particle diameter, initial bed temperature, steam to biomass (S/B) ratio, inlet gas flow rate, and feed position. The simulation results show biomass particle diameter has an insignificant influence on the production of H2 and CH4 while it slightly affects the production of CO and CO2. Higher initial bed temperature leads to a larger decrease of gas temperature at bed exit and benefits the production of H2 and CO. Increasing S/B ratio increases H2 and CO2 production while decreases CH4 and CO production. Larger inlet gas flow rate leads to a shorter gas residence time and the decrease of S/B ratio. Biomass particles fed from the side wall give rise to higher temperature, lower H2 and CO2, and higher CO and CH4 than that fed from the center bottom. Changing feed positions on the side wall has a slight influence on gas temperature while it has an insignificant influence on product compositions.

Keywords: Biomass gasification; CFD-DEM; Operating parameters; Fluidized bed reactor; Numerical simulation (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (12)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0960148120308946
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:159:y:2020:i:c:p:1146-1164

DOI: 10.1016/j.renene.2020.06.001

Access Statistics for this article

Renewable Energy is currently edited by Soteris A. Kalogirou and Paul Christodoulides

More articles in Renewable Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().