Abstract
The aim of this study is to design a uniform temperature distribution in scale-up fixed bed reactors with inserting the internal heat conducting part and different heating methods by numerical simulation. The performance of sorbents, the relevant capture efficiency and the number of running cycles can be improved due to the absence of hot spots. The simulation results show that the performance of desorption is only 58 % at 850 ℃ for the original design as the diameter of the reaction tube is increased from 1 inch to 4 inches. The reactor can be effectively improved by adding axial fins in hollow reactors because the temperature distribution becomes more uniform. The results also show that the best hollow ring radius will vary with the material, the number of fins and heating method. The method of internal heating is better than that of external heating for fixed material and the number of fins.