In order to increase the wheat straw lignocellulose energy-oriented use efficiency,the technology optimization of pretreatment of wheat straw by propionic acid under mildness condition was studied. The experimental results showed that the optimum working conditions were as follows: materials to liquid ratio 1:16, particle size 40 mesh, propionic acid concentration 900 g/L, catalyst concentration 3 g/L, temperature 70℃, pretreatment time 150 min. The remaining rate of cellulose of wheat straw was 92.6% under the optical conditions, and the elimination rates of hemi-cellulose and lignin of wheat straw after propionic acid treat ment were 98.3% and 70.5% respectively.The enzymatic hydrolysis yield of wheat straw pretreated by propionic acid was 90.3%.Under mildness condition,wheat straws pretreated by propionic acid were degraded into the three parts, cellulose, hemi-cellulose and lignin.%为了提高小麦秸秆木质纤维素的能源化利用效率,该文研究了常压温和条件下丙酸预处理小麦秸秆的工艺优化.该方法的最佳工艺条件为:料液比1:16、粒度40目、丙酸质量浓度900 g/L、催化剂质量浓度3g/L、温度70℃,处理时间150 min.在此条件下,小麦秸秆的纤维素保留率为92.6％,半纤维素和木质素的脱除率分别为98.3％和70.5％.丙酸预处理后小麦秸秆的酶解得率90.3％.研究表明,在常压温和条件下,丙酸法预处理小麦秸秆,可有效地将其分离为纤维素、半纤维素、木质素3大组分.
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