Abstract：Taking the catalyst particles in the methanation fixed bed reactor as the research object, a bed-particle dual-scale coupling model was established. In view of the rapid reaction of the methanation process and the significant influence of internal diffusion in the catalyst particles, the influences of average macropore diameter, average mesopore diameter, macroporous porosity and mesoporous porosity on the methanation reaction results were discussed, and the optimal design of the catalyst with a hierarchical pore structure was proposed to strengthen the methanation process. The simulation results showed that the dual-scale coupling model better explored the influence of the micropore structure of the catalyst particles on the reaction results at the bed scale. For spherical particles with a diameter of 5.4 mm, the performance of the reaction was more sensitive to the macroporous porosity and the average mesopore diameter under the simulated production conditions. The methanation process could obtain a higher methane yield if the dual-modal catalyst with macropore and mesopore was used.
YE Yin,ZHANG Yaxin. Research on the Hierarchical Pore Structure of Methanation Catalyst Based on Dual-Scale Coupling Simulation [J]. 化学反应工程与工艺, 2021, 37(1): 55-64.
