Shuai Wang, Juhui Chen, Huilin Lu, Guodong Liu, Liyan Sun, Multi-scale simulation of chemical looping combustion in dual circulating fluidized bed, Applied Energy, Volume 155, 1 October 2015, Pages 719-727, ISSN 0306-2619, http://dx.doi.org/10.1016/j.apenergy.2015.05.109.
Abstract: Chemical looping combustion (CLC) in an interconnected fluidized bed has attracted more and more attention owing to its novel technology with inherent separation of CO2. In recent years, some models have been developed to investigate the gas-particle flow and reactive characteristics during the CLC process. However, multi-scale structures in reactors make it complex to perform a simulation. In the current work, a multi-scale gas–solid flow-reaction coupled model is developed and applied to the simulation of the CLC process in a dual circulating fluidized bed (DCFB) system with consideration of the impact of multi-scale structures on chemical reactions, mass and heat transfer. By comparisons of gas pressure and gas components with experimental data, the present model shows a better prediction. The influence of clusters on the gas compositions and temperature field is analyzed.
Keywords: Computational fluid dynamics; Chemical looping combustion; Cluster; Multi-scale; Dual circulating fluidized bed