木质纤维生物质精炼中木质素的分离及高值化利用

木质纤维素作为最有前途的可再生资源,可替代现有的液体燃料。因此,木质素作为木质纤维生物质细胞壁的主要成分之一,由其开发的高附加值产品将大大提高从可循环利用生物质生产能源的经济性。本文回顾了自催化乙醇精炼技术的优势,相对于其他制浆技术不仅可以高效地从木质纤维生物质中分离出高活性的木质素,还可以获得高附加值的副产品(如糠醛、低聚糖、乙酰丙酸、甲酸、乙酸等)。同时,抽提液可循环利用。基于自催化乙醇精炼木质纤维生物质的特点,介绍了用自催化乙醇精炼所分离出的高活性木质素进行高值化利用的优势,以及用木质素生产高附加值产品的研究及利用,从而为木质纤维生物质中木质素在工业上大量开发利用提供了一条新的途径。

Separation and high-value utilization of lignin from the lignocellulose biomass refining

As the most promising renewable resource, lignocellulose may replace the existing liquid fuel. Lignin is one of the main components of lignocellulose biomass cell walls and therefore developing high value-added products from lignin will greatly improve the economic efficiency in recycling biomass to energy. This paper reviewed the advantages of the auto-catalytic ethanol refining technology. Compared with other pulping technology, it can not only separate highly active lignin from lignocellulose biomass feedstock, but also attain high-value co-products, for instance the furfural, oligosaccharide, levulinic acid, formic acid and acetic acid, etc. Simultaneously, the extracting liquor can be recycled. In the review, based on the characteristics of auto-catalytic ethanol refining lignocellulose biomass feedstocks, we introduced the advantages of high value application of highly active lignin separated from the lignocellulose biomass via autocatalytic ethanol refining. Furthermore, the utilizations of products prepared from the lignin were reported, which provides a new way in large scale development and utilization of lignocellulose biomass lignin in industries.