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Black liquor gasification - CFD model predictions compared with measurements

Abstract

In this work, predictions from a Computational Fluid Dynamics (CFD) model is compared to experimentally obtained data from a pressurized black liquor gasifier. The data consists of gas samples taken from the hot part of the gasification reactor using a water cooled sampling probe. During the considered experimental campaign the oxygen to black liquor equivalence ratio (λ) was varied in three increments, which resulted in a change in reactor temperature and gas composition. The numerical study consists of CFD and thermodynamic equilibrium calculations in the considered λ range using boundary conditions obtained from the experimental campaign. Furthermore, the influence of material description simplification is evaluated using the equilibrium code. The influence of methane concentration on gas composition is evaluated using both CFD and thermodynamic equilibrium calculations. The results show that, the main gas components (H2, CO, C02) can be predicted using both CFD and thermodynamic equilibrium if the H2S and CH4 concentrations are specified and that the influence from simplifying the material description is small.

Category

Academic chapter

Language

English

Author(s)

  • Per Carlsson
  • Magnus Marklund
  • Erik Furusjö
  • Henrik Wiinikka
  • Rikard Gebart

Affiliation

  • SINTEF Energy Research / Termisk energi
  • Sweden

Year

2010

Publisher

TAPPI Press

Book

2010 International Chemical Recovery Conference, Williamsburg, VA, 29 March 2010 - 1 April 2010

ISBN

9781595101983

View this publication at Norwegian Research Information Repository