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IS-AUR-Samarb.progr. Norge Frankrike

Fundamental Modelling of fluctuating particle motion in Chemical Looping Combustion reactors using a Lagrangian approach

Awarded: NOK 60,000

Chemical Looping Combustion (CLC) is a new emerging technology designed to reduce the cost of CO2 capture. This technology incorporates fluidized bed multiphase reactors. The particles used within these reactors exhibit fluctuating motions that occur on s cales which are too small to be simulated directly. Hence, the diffusive effects of these fluctuating motions have to be modelled in order to correctly simulate reactor behaviour. Presently, the nature of these fluctuating motions is not well understood and requires further research effort. The primary aim of this project is therefore to further the understanding of these fluctuating particle motions and subsequently develop reliable models for design, optimization and scale up of CLC reactors. Collabora tion between SINTEF Materials and Chemistry, The Norwegian University of Science and Technology (NTNU) and Université de Toulouse in France is essential for the accomplishment of this goal. There exist two distinct types of fluctuating particle motions: r andom uncorrelated motions and correlated larger scale turbulent-like particle fluctuations. The random uncorrelated motions can be likened to the random fluctuating motions of gas molecules, while the turbulent-like fluctuations are characterized by grou ps of particles moving together as a turbulent eddy. The distinction between these two types of particle fluctuations is not well understood at present. One of the main objectives of this project is to facilitate such an understanding. Additionally, the correct modelling of the turbulent-like particle fluctuations still needs further development. These fluctuating motions will be modelled in a new multiphase modelling framework known as the dense discrete phase model (DDPM). This model simulates particle motion by applying a force balance on each particle according to Newton's laws of motion. The fluctuating particle motions will therefore be modelled as an extra force in the resulting particle equation of motion.

Funding scheme:

IS-AUR-Samarb.progr. Norge Frankrike