Abstract: Due to energy shortage and environmental deterioration，the biomass-based fuel ethanol(BFE)，which has advantages in recyclability and non-pollution，has drawn increasing attention in the past few decades. However，the dehydration process in the preparation of fuel ethanol consumes huge energy，thus has always been a research highlight. In this paper，a review of both domestic and foreign researches in main adsorbents for separating ethanol-water mixtures is made briefly，the advantage of biomass adsorbents over other alternatives in the preparation of fuel ethanol is pointed out，and researching efforts in biomass adsorbents along with the studies in its modification are intensively analyzed. The analysis shows that the adsorbents after modification not only have good absorption efficiency，but also can be used as the feedstock for fuel ethanol after adsorption，which can make full use of the resource. Finally，the prospect of the development trend of biomass adsorbents in the preparation of fuel ethanol is presented. Specifically，obtaining better dehydration effect and recycled process than before is proposed.

Key words: fuel ethanol, adsorbent, biomass, microporous starch, dehydration

摘要： 在最近的几十年中，由于能源短缺和环境恶化，生物质燃料乙醇（BFE）因为其所具有的可循环无污染的优点，引起了人们越来越多的关注。但是在生物燃料乙醇的制备过程中，存在着乙醇脱水工艺能量消耗过大的问题。因此优化乙醇脱水过程一直是人们研究的重中之重。本文简述了国内外吸附法分离乙醇和水工艺中使用的吸附剂，指出了生物质吸附剂在燃料乙醇中优于其它吸附剂的特点，重点分析了生物质吸附剂的研究成果及对其的改性研究。分析表明改性后吸附剂不但拥有良好的吸附效果，还可以在吸附操作结束后重新作为发酵制乙醇的原料，以实现资源的充分利用。最后展望了生物质吸附剂在制备燃料乙醇工艺中的发展趋势，即获得更优秀的脱水效果与更完善的循环利用过程。

关键词: 燃料乙醇, 吸附剂, 生物质, 微孔淀粉, 脱水