(129e) CFD Simulation of the Entire Circulating Fluidized Bed (CFB) Carbon Capture Loop Using Solid Supported Amine Sorbents

Carbon capture using solid sorbents in considered to be a very promising alternative for aqueous solutions of amine-based absorbents to reduce the cost of regeneration during carbon capture and regeneration processes. The computational fluid dynamics (CFD) approach which is an advanced tool for design and scale up of fluid-particle processes was used in this study to simulate two- dimensional gas and solid flow in a circulating fluidized bed (CFB) that was designed by the National Energy Technology Laboratory (NETL) for carbon capture using solid supported amine sorbents. To gain better understanding of the complex flow patterns of particles and fluid through entire CFB loop, a two-dimensional non-reactive CFD simulations of the entire loop including the carbonator, regenerator, the solid circulation rate and pressure drop at different locations of CFB were performed and the results were compared with the experimental data.

In addition, a two-dimensional reactive simulation of the CFB carbon capture unit was also performed to study the extent of CO₂ adsorption and regeneration using amine-based solid sorbents in the temperature swing carbonation regeneration combined system.