微波促小麦秸秆半纤维素稀酸水解研究

Study on Hydrolysis of Hemicellulose from Wheat Straw in Dilute Acid Promoted by Microwave Irradiation

将微波加热法应用于小麦秸秆半纤维素稀硫酸催化水解过程,并与常规间壁式加热法进行了对比研究,通过正交试验考察了酸浓度、原料固含量、反应时间和反应温度对还原糖得率的影响.试验结果表明,对于麦秸半纤维素稀酸水解制备还原糖的转化,微波加热法可有效提高原料转化率和还原糖得率.对麦秸原料和水解残余物进行了红外表征,表征结果与实验测定的原料转化情况一致.

Microwave was applied to catalytic hydrolysis of hemicellulose from wheat straw by dilute sulfuric ac id as a novel heating means. The comparative experiments between traditional partitions heating and microwave heating were carried out. The impacts on the yield of reducing sugar were investigated thl＇ough orthogonal experi ment including four main factors,which were acid concentration, total solids content of raw materials, reaction time and reaction temperature. The experimental results showed that higher conversion rate of raw materials and higher yield of reducing sugar would be achieved when wheat straw in dilute acid under microwave irradiation. Infrared analysis about hydrolysis residue is in accord with the conversion of raw materials in hydrolysis process.