固体酸水解玉米秸秆制备糠醛的研究

摘要

为了减少使用液体酸制备糠醛时对环境的影响,以玉米秸秆为原料,以SO42--TiO2/黏土固体酸为催化剂制备糠醛.对水解温度、时间和固体酸用量等主要影响因素进行了分析,采用响应面法对制备工艺进行了优化,并建立了二次回归模型.当玉米秸秆的粒度为O.45mm、固液比1:10(g:mL)、水解温度为158℃,水解时间为3.8 h,固体酸用量为6.2%,糠醛的得率为60.95%.%The purpose of this study is to reduce the environmental influence of furfural preparation by conventional liquid acid catalysis. Hydrolysis of corn stalks for the production of furfural was carried out using SO24--TiO2/clay solid acid as catalyst. The main factors influencing the reaction, such as hydrolysis temperature, reaction time and the amount of solid acid were analyzed.They were optimized by response surface methodology ( RSM ) in order to set up a quadratic regression model. The optimum experimental conditions were as follows: particle size 0.45 mm, solid-liquid ratio 1:10, hydrolysis temperature 158℃, reaetion time 3.8 h, and catalyst amount 6.2 ％, the yield of furfural was 60.95 ％.