摘要
以玉米秸秆稀酸预水解液为原料,研究了减压蒸发和络合萃取两种脱毒方法对乙酸等抑制物的去除情况。结果表明:玉米秸秆稀酸预水解液减压蒸发脱毒,糠醛完全被去除,而5-羟甲基糠醛则基本不能被去除;当水解液浓缩5.80倍时,其浓缩液中乙酸质量浓度和去除率分别为4.06 g/L和60.45%。络合萃取脱毒的最佳条件:络合萃取剂的组成为30%三烷基胺+50%正辛醇+20%煤油,油水相比2∶1,温度25℃,时间60 min,此时脱毒液中乙酸质量浓度和去除率分别为1.43 g/L和52.33%,糠醛完全被去除,5-羟甲基糠醛的去除率为27.78%。
Two kinds of detoxification methods,vacuum evaporation and complex extraction were applied to remove inhibitors presented in the dilute acid pretreated corn stover prehydrolyzate.The results showed that furfural was completely removed,while 5-hydroxymethylfurfural was not removed at all by only vacuum evaporation.When the prehydrolyzate was condensed to 5.80 times,the concentration of acetic acid in the condensed prehydrolyzate and its removal ratio were 4.06 g/L and 60.45 %,respectively.The optimal conditions of complex extraction detoxification were that 30 % trialkylamine ＋50 % n-octanol ＋20 % kerosene was at the ratio of organic to aqueous phase of 2∶1,and 25 ℃ for 60 min.At this time,the concentration of acetic acid was 1.43 g/L,and the removal ratio of acetic acid,furfural and 5-hydroxymethylfurfural were 52.33 %,100 % and 27.78 %,respectively.
出处
《南京林业大学学报（自然科学版）》
CAS
CSCD
北大核心
2011年第6期71-76,共6页
Journal of Nanjing Forestry University：Natural Sciences Edition
基金
国家林业局林业公益性行业科研专项项目(201004001)
国家自然科学基金项目(30871992)
江苏高校科技创新团队资助项目
江苏高校优势学科建设工程资助项目
关键词
玉米秸秆
稀酸预处理
脱毒
减压蒸发
络合萃取
corn stover
dilute acid pretreatment
detoxification
vacuum evaporation
complex extraction
