生物质裂解气制燃料醇的过程概念设计与研究

Conceptual Process Design and Study of Producing Fuel Alcohols from Biomass Cracking Synthesis Gas

运用过程概念设计的方法,使用流程模拟软件Aspen Plus建立了生物质裂解气制燃料醇的过程模拟与分析模型,燃料醇的构成为含乙醇为主的低碳醇。在给定工艺条件下,通过对模型的灵敏度分析发现：合成气的循环重整分率（0.0-0.9）对工艺过程的氢碳比的影响显著;合成气的循环重整分率提高后,在醇合成反应器中,CO2,H2S等酸性气体含量能保持较低水平,但惰性气体N2存在累积现象且CH4含量（9%-13%）偏高;焦油重整器中甲烷转化率有必要提高。另外,通过对过程的含水量分析发现：水的去除以及醇-烃-合成气复杂体系的分离是该工艺需进一步研究的问题.

Using the process simulation software Aspen Plus,with the method of conceptual process design,the process simulation and analysis model of producing fuel alcohols from biomass cracking synthesis gas was established.The fuel alcohols are higher alcohols and mainly content of ethanol.Through sensitivity analysis of the process that under given conditions,it is found that：the influence of reform fraction of recycle synthesis gas（0.0～0.9） on the H2/CO molar ratio is significantly;in the alcohol synthesis reactor,when the reform fraction of recycle synthesis gas is raised,the content of acid gases,CO2 and H2S,are maintain at a low level,but the inert gas N2 is accumulated and the content of CH4 （9%～13%） is higher;the conversion rate of methane in tar reforming reactor is necessary to be improved.In addition,through the analysis of moisture content of the process,it is found that： the water removes and separate other components form alcohols-hydrocarbons-synthesis gas complex system during the process are needed to be further studied.