Hydrodynamics On Chemical Looping Combustion Using Multiphase Cfd With Kinetic Theory Of Granular Flow

The 13th International Conference on Fluidization - New Paradigm in Fluidization Engineering, May 16-21, 2010 - Hotel Hyundai, Gyeong-ju, Korea

Hydrodynamics On Chemical Looping Combustion Using Multiphase Cfd With Kinetic Theory Of Granular Flow

Jonghwun Jung, POSCO

Isaac K. Gamwoy, U.S. Department of Energy

Abstract

The fundamental knowledge of multiphase reactive hydrodynamics of the gas solid flow is essential for the design, optimization, and operation of industrial reactors. The multiphase computational fluid dynamics (CFD) model with the kinetic theory of granular flow, MFIX, developed earlier at the National Energy Technology Laboratory have been adapted to describe a fuel reactor of chemical looping combustion (CLC) processes.

The chemical kinetics and mass transfer in the fuel reactor have been developed, where the reduction reaction is the first order of methane gas and the oxygen in metal oxygen carriers transfer to gas phase. The fuel conversion rate can be varied by reaction temperature, initial static bed height, and inlet velocity of fuel. The reaction temperature in an earlier work was an important factor for the efficient design of the fuel reactor. In this study, the increase of the initial static bed height for catalyst in the fuel reactor results in the enhancement of the fuel conversion rate at a constant temperature. Successful development of validated CLC models will provide the needed base for the development of such a technology.

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