林产化学与工业2019，Vol.39Issue(1)：81-87,7.DOI:10.3969/j.issn.0253-2417.2019.01.012
低浓度乙酸预处理玉米芯的工艺研究
Pretreatment of Corncob by Dilute Acetic Acid
摘要
Abstract
A dilute acetic acid pretreatment technology for corncob was established to remove lignin, convert hemicellulose into xylose and improve the enzymatic hydrolysis yield. The effects of acetic acid concentration, pretreatment temperature and time on pretreatment goal were investigated and the results showed that most of the hemicellulose and partial lignin in the corncob were removed by pretreating with 5％ acetic acid. Moreover, the pretreated corncob was easy to be hydrolyzed. Under the optimal condition (pretreatment temperature of 160 ℃, holding time of 60 min, acetic acid concentration of 5％ and solid-liquid ratio of 1∶8 (g∶mL) , the yield of corncob solid residue was 53.75％, the cellulose retention rate of corncob solid residue could reach 93.17％, and 87.36％ of the hemicelluloses and 25.04％ of the lignin were removed. Meanwhile, 15.56 g/L xylose was obtained from the pretreatment liquid. The maximum enzymatic hydrolysis yield of pretreated corncob solid could be up to 92.69％ within 72 h.关键词
稀乙酸/预处理/玉米芯/木糖浓度/酶解得率Key words
dilute acetic acid/pretreatment/corncob/xylose concentration/enzymatic hydrolysis yield分类
化学化工引用本文复制引用
乔慧,欧阳水平,刘蕾,欧阳嘉..低浓度乙酸预处理玉米芯的工艺研究[J].林产化学与工业,2019,39(1):81-87,7.基金项目
国家自然科学基金资助项目(51561145015) （51561145015）
