(331a) C2U Performance Modeling for CO2 Adsorption

The National Energy Technology Laboratory as well as other institutions are in the process of conceptualizing new technology as an alternative to amine based absorption processes for CO2 capture from large sources such as Utility power generation facilities. Many, but not all of these advanced dry processes are based upon sorbents composed of supported polyamines. This particular investigation gives a first time comparison between the predicted performance and the experimental performance of one of these new class of sorbents.   In the continuous process CO2 from is absorbed from flue gas in the absorber, a cyclone separates the carbonated particles from the de-carbonated flue gas and then regenerates the sorbent, creating a concentrated stream of pure CO2 for sequestration. In the current work, the reactors are run in a batch mode, that is without circulating solids.  In this work, experimental data from adsorption and regeneration in a fluidized bed operated in batch mode are compared to simulation predictions from a 3-dimentional multiphase flow model complete with chemistry and thermal effects. The effects of gas flow rate and reactor temperature are explored and compared with experimental measurements. The specifics for the experimental facility and the model as well as the comparative analysis between the data and the simulation results will be discussed.