Abstract
For the issue of global warming, the capture and utilization of carbon dioxide have significant potential in the research aspect of power generation. In this work, we use the COMSOL software to analyze numerically on performance of CO2 methanation reactor. This work can be divided into two main parts as follows. (1) We use the numerical method to verify the results from experiment of tubular CO2 methanator, furthermore; we investigate the effects of adjusting parameters such as operating temperature, catalyst loading, and consistent of inlet on performance. (2) We propose a new design of reactor- combine the reactor with heat recovery. Then we study on the relevant improvement which is compared with original geometry by numerical method. The results show that (1) To optimize the function of reactor, we need to control the operating temperature around 300℃, the volume flow rate lower than 3ml/s, H2/CO2 ratio higher than 4, appropriately increasing the catalyst loading and the water gas shift mechanism. (2) Considering the heat loss for the real situation in life, because of the even distribution of heat, the CO2 methanator with heat recovery can effectively improve the CO2 conversion and maintain a high efficiency under unfavorable conditions.