关键词: 代用天然气, 串行流化床, 模拟, 生物质气化

Abstract: The technology of synthetic natural gas (SNG) production from biomass gasification was described. With Aspen Plus software, the simulating model of the SNG production via interconnected fluidized beds was established and the process was simulated. The effects of the operating conditions of the gasifier, like the gasification temperature and the steam to biomass ratio (S/B), on the methane yield and carbon conversion of the whole system were studied. The simulating results showed that higher gasification temperature and S/B favored gasification process, which resulted in a higher content of biosyngas and higher ratio of H2 to CO. To achieve higher methane yield and carbon conversion, the suitable gasification temperature is 700～750℃, and S/B is about 0.4.

Key words: synthetic natural gas, interconnected fluidized beds, simulation, biomass gasification