用木质纤维原料生产乙醇的预处理工艺

Pretreatment of Lignocellulosic Biomass for Producing Ethanol

预处理是利用木质生物资源生产乙醇的一个重要环节,纤维细胞的空隙度、纤维本身的结晶度、预处理温度、反应时间、pH值、纤维质原料的浓度对预处理产生影响,目前的预处理技术对木质生物资源的3种主要组分分离不完全且纤维素降解程度较高。今后对预处理的研究方向:有效分离出活性纤维,同时使半纤维素免遭破坏并充分利用,尽量减少对纤维素酶起抑制作用的降解产物的形成,减少能量消耗,降低成本,生产出高附加值的木素产品。

Pretreatment, as an important procedure in the use of lignocellulose biomass to produce ethanol ,is influenced mainly by some factors including porosity of fiber cells, fiber crystallinity, pretreatment temperature, reaction time, pH value, concentration of lignocellulose biomass.Currently, the incomplete separation of three main compositions of lignocellulose biomass in pretreatment and the cellulose degradation became the inevitable technical problems, The research on pretreatment in the future should cover the following aspects： effective separation of active fibers with full use of and no damage on hemicellulose, reduce of the formation of degradation products as possible which could inhibit cellulase, reduce of energy consumption and production cost as possible, and production of lignin products with high affiliated values. （Tran. by YUE Yang）