杨木制备纤维乙醇过程中化学成分变化的分析

摘要

杨树是我国重要的速生树种。以杨木为原料制备生物乙醇是解决当今能源问题的一项新的尝试。对杨木原料蒸汽爆破预处理后以及菌处理后的化学成分及化学性质进行了测定分析。通过对比其化学成分（纤维素、木素、半纤维素、抽出物、灰分及蛋白质）的变化，研究了以杨木为原料制备生物乙醇生产过程中化学成分变化机理，旨在为指导杨木制备木质纤维乙醇的生产，并为发酵后副产物的回收再利用提供理论依据。%Poplar is an important fast-growing species in China. The preparation of bio-ethanol with poplar wood as the raw material is a new attempt to solve today’s energy problems. After steam-exploded pretreatment and then bacteria treatment to the poplar wood raw materials, the materials’ chemical composition and properties were measured and analyzed. Through contrasting the changes of the materials’ chemical composition(cellulose, lignin, hemicelluloses, extracts, ash and protein), the mechanism of chemical change of the tested materials in the bioethanol production process prepared from poplar wood was studied, the surplus product contained 64.07%lignin, 6.78% cellulose and 6.88% hemicellulose. The results provide a theoretical basis for guiding the preparation of poplar wood cellulosic ethanol production, and the subsequent recycling of fermentation by-products.