Inhibition of temperature runaway phenomenon in the Sabatier process using bed dilution structure: LBM‐DEM simulation

Abstract

The Sabatier process is promising for carbon dioxide utilization and energy storage. However, the serious problem that limits more comprehensive industrial applications is catalyst deactivation due to the temperature runaway phenomenon. The inert particle dilution approach, including the mixing dilution method and layered dilution method is applied to solve this problem. Based on the lattice kinetic scheme‐lattice Boltzmann method (LKS‐LBM), the effects of three parameters in bed dilution structure reconstructed by the discrete element method (DEM) on temperature distribution and carbon conversion rate were discussed, so as to investigate the relationship between packing structure and temperature distribution. Furthermore, numerical results indicated that an optimal bed dilution structure, which not only can control the peak temperature below the critical temperature to avoid coking and sintering of catalyst, but also can improve the conversion rate by almost 18% compared with the structure without dilution under the same circumstance.

Close-Contact Oxygen Vacancies Synthesized by FSP Promote the Supplement of Active Oxygen Species To Improve the Catalytic Combustion Performance of Toluene

“…In chemical engineering catalytic reactions, temperature runaway is a relatively common out-of-control phenomenon . During the elimination of toluene, a high concentration of reactants will participate in the reaction, causing the local temperature to rise rapidly.…”

“…In chemical engineering catalytic reactions, temperature runaway is a relatively common out-of-control phenomenon. 32 During the elimination of toluene, a high concentration of reactants will participate in the reaction, causing the local temperature to rise rapidly. The increase in temperature makes the current part of toluene decompose more quickly, which further increases the temperature.…”