Flow-Reaction Behavior and Process Strengthening in Fluidized Bed Reactors for the Oxidative Coupling of Methane
CHANG Ming1, CAI Min1, LI Jian1, LIU Mengxi1, LU Chunxi1, JIANG Guiyuan1, ZHANG Peng2
1. State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China;
2. Petrochina Petrochemical Research Institute, Beijing 102206, China
Abstract：The effects of gas-solid hydrodynamics characteristics on oxidative coupling of methane (OCM) in a bubbling bed reactor and a riser reactor were investigated by computational fluid dynamics (CFD). Furthermore, the multistage feeding strategy was proposed to optimize the reaction performance of the riser reactor. Results showed that high solids holdup and strong gas back-mixing in the bubbling bed reactor enhanced the continuous reaction of ethylene, which led to the C2 yield of the outlet was only 15.3%. In the riser reactor, low solids holdup and plug flow structure decreased the continuous reaction of C2H4, the C2 yield reached 22.1% at the outlet. Adopting multi-stage feeding strategy to reduce the oxygen concentration of each feed, which could improve the CH4 conversion, C2 selectivity and C2 yield at the same time. The best CH4 conversion of 62.8%, C2 selectivity of 50.9% and C2 yield of 31.9% were obtained in the three stages feeding strategy, increasing by 5.7, 11.7 and 9.5 percentage points respectively compared to single stage feeding strategy.
CHANG Ming,CAI Min,LI Jian et al. Flow-Reaction Behavior and Process Strengthening in Fluidized Bed Reactors for the Oxidative Coupling of Methane[J]. Chemical Reaction Engineering and Technology, 2025, 41(4): 445-456.
