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以秸秆为研究对象,利用Aspen Plus软件建立串行流化床稻秸气化制取富氢气体合成甲醇的模型,研究不同反应条件包括气化温度、气化压力、水蒸气与生物质(稻秸)的配比、液化温度及液化压力对甲醇产率的影响。结果表明:采用串行流化床稻秸水蒸气气化技术可获得氢浓度为55%以上的富氢燃气;在C301铜基催化剂作用下,对于以制甲醇为目的的串行流化床稻秸气化系统,气化温度建议在750℃左右,气化压力尽量接近常压,水蒸气与生物质配比在0.4～0.5内为佳,液化温度建议控制在220～240℃,液化压力为5MPa;在此最佳工况下,每千克的干燥无灰基稻秸可获得11.97mol的最大甲醇产量。研究成果为今后开展生物质气化及气化产气合成甲醇实验提供理论依据。
Taking straw as the research object, the model of synthesizing methanol from hydrogen-rich gas was established by using Aspen Plus software to produce hydrogen-rich gas from rice straw. The effects of different reaction conditions including gasification temperature, gasification pressure, water vapor and biomass Straw) ratio, liquefaction temperature and liquefaction pressure on the yield of methanol. The results showed that the hydrogen-enriched gas with a hydrogen concentration of over 55% could be obtained by using the steam bed gasification technology of the tandem-fluidized bed rice straw. Under the action of C301 Cu-based catalyst, It is suggested that the gasification pressure should be as close to normal pressure as possible and the ratio of water vapor to biomass should be within 0.4-0.5. The liquefaction temperature should be controlled at 220-240 ℃ and the liquefaction pressure should be 5MPa; Under the best conditions, the maximum methanol yield of 11.97mol can be obtained per kilogram of dry ash-free rice straw. The research results provide a theoretical basis for the future experiments of biomass gasification and gasification gas production methanol synthesis.