Abstract: Pretreatment process for lignocellulose by dilute hydrochloric acid was performed and four factors including reaction temperature (θ), reaction time (t), concentration of hydrochloric acid (c), and the ratio of liquid/solid (r) were studied by method of Plackett-Burman design. Finally, the preferred pretreatment conditions are found as follows: t＝1 h，θ＝115 ℃，c＝1％ and r＝10.

Key words: Lignocellulose, Pretreatment, Plackett-Burman design, Dilute hydrochloric acid, Fuel ethanol

摘要： 研究了稀盐酸处理木质纤维素，应用Plackett-Burman设计的实验方法考察了反应时间（t）、反应温度（θ）、盐酸质量分数（c）和液固质量比（r）4个因素对木质纤维素预处理效果的影响，并对这4个因素进行组合优化工艺过程。结果表明,当t＝1 h、θ＝115 ℃、c＝1%，r＝10为较优化的反应条件。

关键词: 木质纤维素, 预处理, P-B设计, 稀盐酸, 燃料乙醇