Simulations for scale-up of Chemical Looping with Oxygen Uncoupling (CLOU) systems

Process modeling and computational fluid dynamic (CFD) simulations are effective tools for the scale-up of chemical looping with oxygen uncoupling (CLOU) systems. Process modeling studies have been completed for both chemical looping combustion (CLC) and CLOU. CFD simulations take into account the complex fluid dynamics, reaction kinetics, and heat transfer in the systems, in addition to more global material and energy balances. The chapter discusses the state of CFD modeling for CLC systems, with a particular focus on the differences between Eulerian-Eulerian (E-E) and Eulerian-Lagrangian (E-L) frames of reference. E-E methods are not as computationally extensive; they are dependent on drag models and do not have the capability of tracking particles to the extent of E-L methods, which may be a limitation. The models have shown their ability to aid in and optimize system designs, especially with regard to supplying high-fidelity information.