硫酸亚铁/微波辐射稀酸水解玉米秸秆产生还原糖

采用微波辐射,在金属盐硫酸亚铁为助催化剂的条件下,对玉米秸秆进行稀酸水解制备还原糖的研究,考察了硫酸亚铁质量分数、硫酸质量分数、液固质量比、微波辐射功率、微波辐射时间和微波辐射压力对水解制备还原糖产率的影响。结果表明,硫酸亚铁质量分数3%、硫酸质量分数2%、液固质量比15、微波辐射功率187.5W、微波辐射时间30min、微波辐射压力0.3MPa为最佳水解条件,在此条件下还原糖产率可达38.5%,与无金属盐时的微波辐射稀酸水解方法相比,还原糖产率增加了1.1倍,与无微波辐射时的稀酸水解方法相比,还原糖产率增加了2.8倍。

Hydrolysis of Corn Straw to Produce Reducing Sugar by Diluted Acid Over Ferrous Sulfate Under Microwave Radiation

The corn straw was hydrolyzed by diluted acid via microwave radiation under the conditions of the metal salt ferrous sulfate as catalyst.The effect on the reducing sugar production rate was investigated by the concentration of ferrous sulfate,sulfuric acid content,ratio of liquid to solid,the microwave radiation power,time and pressure.The results show that the product yield can reach 38.5% under the best hydrolysis conditions:ferrous sulfate mass fraction of 3%,sulfuric acid mass fraction of 2%,mass ratio of liquid to solid 15,the microwave radiation power 187.5 W,the microwave radiation time 30 min and the microwave radiation pressure 0.3 MPa.Compared to the method without ferrous sulfate or without microwave radiation,this method shows higher yields by 1.1 and 2.8 times,respectively.