Effect of Methanol Hydrogen Bond Association in Supercritical Medium on Methanol Synthesis
1. Catalyst Company Limited, SINOPEC, Beijing 100029, China;
2. State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China
Abstract：To elucidate the promoting effect of supercritical fluid on methanol synthesis, the synthesis of methanol using supercritical n-hexane was investigated in a fixed-bed reactor. The results show that the methanol concentration (in the nitrogen) in the outlet of the methanol synthesis reactor is lower than that of the equilibrium value when the diffusion resistance of the catalyst was ignored, while the methanol concentration exported from the reactor in supercritical n-hexane medium was much higher than the equilibrium value. In addition, the concentration distribution model of the methanol synthesis in supercritical n-hexane in the fixed-bed reactor was established. The influence of the existence of methanol tetrameric species on the reaction results was simulated. It was found that the methanol monomer concentration on the surface of the catalyst was greatly reduced due to the hydrogen bond association between the methanol molecules, which promoted the equilibrium toward the direction of the methanol synthesis reaction, and the methanol concentration in the fixed-bed outlet was higher than the equilibrium value.
Wu Sicao 1,2,Gu Songyuan 1 et al. Effect of Methanol Hydrogen Bond Association in Supercritical Medium on Methanol Synthesis[J]. 化学反应工程与工艺, 2016, 32(5): 432-437.
