Mathematical Modeling of Fluidized Bed Reactor for CO2 Capture in a Typical Cement Producing Plant Existing in Nigeria

Calcium looping technology has a high potential for capturing CO₂ in Typical Cement Producing Plant Existing in Nigeria Power Generation Plant. This work modelled the calcium looping process utilizing a twin fluidized bed reactor. Incorporating the technology into the plant required the carbonator to operate under a flow rate of 0.55 m³/s and the regenerator at 0.85 m³/s to capture 181,175 metric tonnes of CO₂ in 724,000 metric tonnes of flue gas produced from the power plant annually. The model equations developed were solved numerically using the Runge-Kutta Fourth Order method. Math Works was used to analyze the impact of performance parameters such as temperature, reactor height, residence time, and particle size. The result showed promise for capturing 81.8% of CO₂ from the flue gas in the carbonator at a temperature of 450^oC, and recovering 61.7% of highly concentrated CO₂ in the regenerator at a temperature 1200^oC and a residence time of 30 mins.

Keywords: Cement Industry, Fossil Fuel, Kinetics, Matlab., Runge-Kutta approach; calcium looping process, capturing and sequestration (CCS), greenhouse gases (GHGs)