Optimization of reactive carbon dioxide removal in a lab scale spray dryer using response surface methodology

In present study using a lab scale spray dryer absorber the reactive absorption of CO2 with NaOH solution was experimentally examined. Response surface method was used for design of experiments and process optimization and the influence of operating parameters including temperature, absorbent concentration, CO2 inlet concentration, nozzle size and liquid to gas ratio on the removal efficiency was investigated. The results of optimization show that to reach the maximum removal efficiency the optimum values of the mentioned operating conditions including inlet gas temperature, NaOH mass concentration, inlet CO2 volume concentration, nozzle diameter and L/G ratio are 139.4 oC, 9.3%, 10%, 0.5 mm and 0.05 ml/L respectively.