With the increasing requirements for biogas desulfurization, the LO-CAT process design needed to be optimized to meet the production requirements. The purpose of this study was to establish a joint optimization model based on two-film theory and response surface methodology (RSM) to investigate the gas-liquid flow, mass transfer, and chemical reaction processes of the biogas reactor and to obtain the optimal operating conditions. The model was validated based on the measured data of the biogas reactor in a 355 KW desulfurization unit at the landfill. It was revealed that the optimal parameters for the gas-liquid flow field were a particle diameter of 3100 µm, a liquid/gas ratio of 19 L/m³, a nozzle angle of 55°, and an inlet velocity of 16 m/s. The effect of inlet velocity was most significant in the LO-CAT process due to its internal extended entrance. The synergistic modulation between gas and liquid then improved the homogeneity of the flow field through vortices, increasing flow field uniformity by 20.8%. The absorption of H₂S was closely related to the change in flow pattern; the mass transfer process was mainly limited by the "liquid membrane limitation." Optimized parameter desulphurization efficiency increased by 28.76%. This study provided practical significance for the rational design and optimized operation of industrial biogas purification plants based on multiphase flow reaction transfer.

随着沼气脱硫要求的不断提高，需要优化LO-CAT工艺设计以满足生产要求。本研究的目的是建立基于双膜理论和响应面法（RSM）的联合优化模型，研究沼气反应器的气液流动、传质和化学反应过程，并获得最佳运行状态。状况。基于垃圾填埋场355KW脱硫装置沼气反应器的实测数据对模型进行了验证。结果表明，气液流场的最佳参数为粒径3100μm、液气比19L/m ³ 、喷嘴角度55°、入口速度16m/s。 。由于其内部延伸的入口，入口速度的影响在 LO-CAT 过程中最为显着。气体和液体之间的协同调制通过涡流改善了流场的均匀性，流场均匀度提高了20.8%。_{H 2 S}的吸收与流型的变化密切相关；传质过程主要受到“液膜限制”的限制。优化参数脱硫效率提高28.76%。该研究为基于多相流反应传递的工业沼气净化装置的合理设计和优化运行提供了现实意义。