关键词: 化学环制氢, 流化床, 反应器, 工艺模拟, 反应机理, 传质机理

Abstract: The chemical-looping hydrogen generation technology can efficiently produce hydrogen from fossil fuels and separate carbon dioxide. Due to the lack of reactor model suitable for chemical-looping hydrogen generation in commercial process simulation software, which restricts the process simulation and industrial application. A three-fluid bed reactor model for hydrogen generation by chemical-looping process based on axial diffusion equation is established, and the reactor model is embedded in the commercial process simulation software to realize the whole process simulation and optimization. The operation conditions of the three-fluid bed reactor are analyzed. The results show that the steam reactor can produce hydrogen efficiently under the operation temperature of 850 ℃ and the ratio of steam input flux to natural gas input flux of 2.6, the ratio of hydrogen to methane is 263.86%. Under the operating temperature of 800 ℃ and the ratio of Fe₂O₃ flux to natural gas input flux of 3.82, the CO₂ could be separated efficiently and the CO₂ capture rate can reach 99.21%.

Key words: chemical-looping hydrogen generation, fluidized bed, reactor, process simulation, reaction mechanism, mass transfer mechanism