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生物质与煤共气化可解决生物质不易稳定流化以及气化气焦油含量高的问题。文中利用Aspen Plus软件对流化床生物质与煤共气化进行模拟。为了更真实地反映流化床内的实际反应情况，采用嵌入 FORTRAN 气化反应动力学及流体动力学子程序的连续搅拌釜式反应器来代替惯用的Gibbs反应器，结果表明该模型的模拟值与试验值吻合较好。利用灵敏度分析功能研究了水蒸气/物料质量比(S/F)对产气组分、热值和气化效率等参数的影响，结果表明：增大水蒸气与物料质量比有利于氢气产率的提高，当S/F值取0.35~0.45时，气化效率和产气热值较高。“,”Co-gasification of biomass and coal can improve the fluidization of biomass and prohibit the production of tar. This paper applied the Aspen Plus to simulate the co-gasification of biomass and coal in fluidized bed gasifier. To simulate the reality in a fluidized bed gasifier, the gasification reaction kinetics was expressed by FORTRAN subroutine in RCSTRs , and then the RSCTRS in series were used to substitute the Gibbs reactor . The results indicate that the simulating values are well agreed with the experimental data.Through the sensitivity analysis model of Aspen Plus, the effects of steam-to-feed ratio (S/F) on various factors such as gas composition, heating value and gasification efficiency were systematically studied. The simulation results indicate that the increase of S/F value is conductive to improve hydrogen yield. When the S/F value is in range of 0.35~0.45, the high gasification efficiency and heating values could be obtained.