Modelling coal gasification with CFD and discrete phase method

Journal Article · Fri Dec 01 00:00:00 EST 2006 · Journal of the Institute of Energy

DOI:https://doi.org/10.1179/174602206X148865· OSTI ID:900294

Shi, S P; Zitney, S E; Shahnam, M; Syamlal, M; Rogers, W A

In the present paper the authors describe a computational fluid dynamics model of a two-stage, oxygen blown, entrained flow, coal slurry gasifier for use in advanced power plant simulations. The discrete phase method is used to simulate the coal slurry flow. The physical and chemical processing of coal slurry gasification is implemented by calculating the discrete phase trajectory using a Lagrangian formulation. The particle tracking is coupled with specific physical processes, in which the coal particles sequentially undergo moisture release, vaporisation, devolatilisation, char oxidation and char gasification. Using specified plant boundary conditions, the gasification model predicts a synthesis gas composition that is very close to the values calculated by a restricted equilibrium reactor model tuned to represent typical experimental data. The char conversions are 100 and 86% for the first stage and second stage respectively.

• Research Organization: National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR (United States)
• Sponsoring Organization: USDOE - Office of Fossil Energy (FE)
• OSTI ID: 900294
• Report Number(s): DOE/NETL-IR-2005-076; TRN: US200722%%257
• Journal Information: Journal of the Institute of Energy, Vol. 79, Issue 4; Conference: Fourth International Conference on Computational Heat and Mass Transfer, Paris-Cachan, France, May 17-20, 2005; Related Information: Also published in proceedings set: Progress in computational heat and mass transfer, Lavoisier, ISBN 2-7430-0801-6, v. 1, pp. 593-598; ISSN 0144-2600
• Publisher: Maney Publishing on behalf of the Energy Institute
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
20 FOSSIL-FUELED POWER PLANTS
BOUNDARY CONDITIONS
CHARS
COAL
COAL GASIFICATION
COMPUTERIZED SIMULATION
DEVOLATILIZATION
EVAPORATION
FLUID MECHANICS
GASIFICATION
LAGRANGIAN FUNCTION
MASS TRANSFER
MOISTURE
OXIDATION
OXYGEN
POWER PLANTS
SYNTHESIS GAS
CFD
DPM
CHEMICAL REACTION
KINETICS