稀硫酸协同乙二醇高效解构玉米秸秆及对酶解效率的影响

Dilute Sulfuric Acid Synergizes with Ethylene Glycol to Efficiently Deconstruct Corn Straw and Its Effect on Enzymatic Hydrolysis Efficiency

为提高玉米秸秆的高值化利用效率,需打破其结构的“顽抗性”,对其进行高效拆解。利用稀硫酸协同乙二醇对玉米秸秆进行高效拆解,探究预处理温度、时间、溶剂浓度对解构的影响;同时,研究玉米秸秆结构变化对酶解效率的影响。结果表明:0.7%硫酸协同50%乙二醇,在180℃、30 min条件下,具有最好的解构效果,可实现82.51%的纤维素保留率、70.15%的半纤维素脱除率和46.62%的木质素脱除率。结构表征表明,解构后的玉米秸秆表面粗糙,比表面积增大,可提高纤维素酶可及性,提升酶解效率。

In order to enhance the efficient utilization of corn straw,it is crucial to overcome its'refractory nature'and dismantle it effectively.This study utilized dilute sulfuric acid in combination with ethylene glycol to efficiently break down corn straw,investigating the impact of pretreatment temperature,duration,and solvent concentration on deconstruction.Additionally,the study examined how structural changes in corn straw affect enzymatic hydrolysis efficiency.The findings revealed that a mixture of 0.7%sulfuric acid and 50%ethylene glycol yielded the most effective deconstruction results at 180℃for 30 minutes,resulting in a cellulose retention rate of 82.51%,hemicellulose removal rate of 70.15%,and lignin removal rate of 46.62%.Structural analysis indicated that the deconstructed corn straw exhibited a rough surface and increased specific surface area,potentially enhancing cellulase accessibility and enzymatic hydrolysis efficiency.This research offers valuable insights into the efficient deconstruction of corn straw and the optimization of resource utilization.