Review of recent advances in process modeling and computational fluid dynamics simulation of chemical-looping combustion

The paper presents a review of recent advances in system-level simulations and computational fl uid dynamics (CFD) simulations of the Chemical-Looping Combustion (CLC) process. Process-level simulations are presented for CLC using Aspen Plus and the infl ow rates are optimized to maximize energy output. The multi-stage fuel reaction concept is demonstrated to address the slow char gasifi cation when solid coal is used as fuel. The development of the multiphase modeling process for CFD simulations of a CLC reactor is reviewed, and the utility of the various drag models that account for the solid-gas interaction is discussed. The review is concluded with a complete multiphase CFD simulation of reacting fl ow in a CLC reactor that ties together the various developments in this fi eld in the current literature. The work presented in this paper provides valuable insights into the various process and design optimizations critical to the effi cient operation and performance of the CLC process.