Performance Evaluation of Silica-PEI Adsorbents in a Two-Bubbling-Bed CO2 Capture System

In this study, the performance of silica-PEI adsorbents which is supplied by the University of Nottingham (UNOTT) have been tested in a continuous CO₂ capture system. It consists of a bubbling fluidized-bed sorption reactor and a bubbling fluidized-bed regeneration reactor. We used a simulated flue gas which contains 15 vol.% of CO₂ w/o moisture (N₂-balance). In the regeneration reactor, N₂ itself has been used as a fluidizing medium in order to check the material balance of the capture system. Based on the continuous experiments, the dynamic sorption capacity and the CO₂ removal performance have been evaluated according to the operating temperature, solid circulation rate, and bed height. And also, the amount of total carry over of both reactors has been measured in order to evaluate the mechanical strength of the adsorbents.