0
Research Papers

Transient Reacting Flow Simulation of Spouted Fluidized Bed for Coal-Direct Chemical Looping Combustion

[+] Author and Article Information
Subhodeep Banerjee

Department of Mechanical Engineering &
Materials Science,
Washington University in St. Louis,
1 Brookings Drive,
St. Louis, MO 63128
e-mail: sb13@wustl.edu

Ramesh K. Agarwal

Fellow ASME
Department of Mechanical Engineering &
Materials Science,
Washington University in St. Louis,
1 Brookings Drive,
St. Louis, MO 63128
e-mail: rka@wustl.edu

1Corresponding author.

Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF THERMAL SCIENCE AND ENGINEERING APPLICATIONS. Manuscript received July 20, 2014; final manuscript received February 12, 2015; published online March 24, 2015. Assoc. Editor: Ziad Saghir.

J. Thermal Sci. Eng. Appl 7(2), 021016 (Jun 01, 2015) (9 pages) Paper No: TSEA-14-1167; doi: 10.1115/1.4029951 History: Received July 20, 2014; Revised February 12, 2015; Online March 24, 2015

Coal-direct chemical-looping combustion (CD-CLC) is a next generation combustion technology that shows great promise as a solution for the need of high-efficiency low-cost carbon capture from fossil fueled power plants. To realize this technology on an industrial scale, the development of high-fidelity simulations is a necessary step to develop a thorough understanding of the CLC process. In this paper, simulations for multiphase flow of the CD-CLC process with chemical reactions are performed using ANSYS Fluent computational fluid dynamics (CFD) software. The details of the solid–gas two-phase hydrodynamics in the CLC process are investigated using the Lagrangian particle-tracking approach called the discrete element method (DEM) for the movement and interaction of the solid oxygen carrier particles with the gaseous fuel. The initial CFD/DEM simulation shows excellent agreement with the experimental results obtained in a laboratory scale fuel reactor in cold-flow conditions at Darmstadt University of Technology. Subsequent simulations using 60% Fe2O3 supported on MgAl2O4 reacting with gaseous CH4 demonstrate successful integration of chemical reactions into the CFCD/DEM approach. This work provides a strong foundation for future simulations of CD-CLC systems using solid coal as fuel, which will be crucial for successful deployment of CD-CLC technology from the laboratory scale to pilot and industrial scale projects.

FIGURES IN THIS ARTICLE
<>
Copyright © 2015 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Fig. 1

Reacting particle in the multiple surface reactions model

Grahic Jump Location
Fig. 8

Particle tracks colored by mass fraction of Fe3O4 relative to original mass of Fe2O3

Grahic Jump Location
Fig. 6

Particle tracks colored by velocity magnitude in reacting flow with F60AL1100 particles

Grahic Jump Location
Fig. 4

Time variation of bed height and pressure at various heights for cold-flow simulation

Grahic Jump Location
Fig. 3

Comparison of particle distribution in the reactor for the first 300 ms of jet injection between Fluent CFD/DEM simulation (top) and TU-Darmstadt experiment (bottom)

Grahic Jump Location
Fig. 2

Spouted fluidized bed apparatus at Darmstadt University of Technology (left) and CFD model (right)

Grahic Jump Location
Fig. 9

Contours of CO2 mass fraction produced by reaction of Fe2O3 with CH4

Grahic Jump Location
Fig. 7

Static pressure at pressure taps P1–P5 in the CD-CLC system of Fig. 5 at t = 400 ms (upper left), 800 ms (upper right), 1200 ms (lower left), and 1600 ms (lower right) in reacting flow

Grahic Jump Location
Fig. 5

Geometry outline with pressure taps, mesh, and wireframe of the complete CD-CLC configuration

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In