CAJ | 학술논문

分离制取玉米秸秆中非木质素类的4类组分纤维素、半纤维素、热水提取物和乙醇提取物，采用高效液相色谱研究其在稀硫酸预处理过程中主要水溶性降解产物的生成规律。其中，纤维素降解生成葡萄糖、甲酸、乙酰丙酸和5-羟甲基糠醛；半纤维素降解生成木糖、阿拉伯糖、葡萄糖醛酸、半乳糖醛酸、乙酸和糠醛；热水提取物降解生成葡萄糖、木糖、阿拉伯糖、甲酸、乙酸、乙酰丙酸、5-羟甲基糠醛和糠醛；乙醇提取物降解生成少量的葡萄糖、木糖、乙酸、乙酰丙酸和5-羟甲基糠醛。抑制物甲酸、乙酰丙酸和5-羟甲基糠醛主要来自纤维素，乙酸和糠醛来自半纤维素，产量可分别为1.4%、2.7%、2.2%、3.1%和7.8%(以玉米秸秆计)。硫酸质量分数是影响乙酸产量的主要工艺因素，而反应温度是影响甲酸、乙酰丙酸、5-羟甲基糠醛和糠醛产量的主要工艺因素。
분리제취옥미갈간중비목질소류적4류조분섬유소、반섬유소、열수제취물화을순제취물，채용고효액상색보연구기재희류산예처리과정중주요수용성강해산물적생성규률。기중，섬유소강해생성포도당、갑산、을선병산화5-간갑기강철；반섬유소강해생성목당、아랍백당、포도당철산、반유당철산、을산화강철；열수제취물강해생성포도당、목당、아랍백당、갑산、을산、을선병산、5-간갑기강철화강철；을순제취물강해생성소량적포도당、목당、을산、을선병산화5-간갑기강철。억제물갑산、을선병산화5-간갑기강철주요래자섬유소，을산화강철래자반섬유소，산량가분별위1.4%、2.7%、2.2%、3.1%화7.8%(이옥미갈간계)。류산질량분수시영향을산산량적주요공예인소，이반응온도시영향갑산、을선병산、5-간갑기강철화강철산량적주요공예인소。
Four main non-lignin constituents in corn stover, including cellulose, hemicellulose, hot water extractives, and ethanol extractives, were prepared and pretreated with dilute sulfuric acid, respectively. Their water soluble degradation products profiles were analyzed by high performance liquid chromatography detection. During dilute sulfuric acid pretreatment, glucose, formic acid ( FA ) , levulinic acid ( LA ) , and 5-hydroxymethylfurfural ( HMF ) were released from cellulose degradation. Xylose, arabinose, glucuronic acid, galacturonic acid, acetic acid ( AA) , and furfural were released from hemicellulose degradation. The hot water extractives degradation produced glucose, xylose, arabinose, FA, AA, LA, HMF, and furfural, and only trace of glucose, xylose, AA, LA, and HMF were found in the hydrolyzates of ethanol extractives. Totally, FA, LA, and HMF mainly originated from cellulose degradation at the yields of 1. 4%, 2. 7%, and 2. 2%, while AA and furfural came from hemicellulose degradation at the yields of 3. 1% and 7. 8% on the basis of corn stove weight, respectively. Orthogonal tests showed that the AA production was significantly affected by the concentration of sulfuric acid, while the FA, LA, HMF, and furfural formations were seriously affected by the pretreatment temperature.