摘要
以花生壳作为生物质水解原料,硫酸和盐酸作为水解用无机酸,选择超声波振荡、碱液处理、微波辐照法作为预处理模式,研究水解过程中葡萄糖和乙酰丙酸产率。结果表明:以盐酸为主催化剂,加入6%的硫酸亚铁作为助催化剂,超声波振荡1h,在反应3h后,乙酰丙酸产率可以达到23%,失重率可以达到57%以上,既有利于生成乙酰丙酸,又有利于原料的减量化。碱液处理后原料很难生成乙酰丙酸,但是失重率有所提高,可达到60%以上,可见碱液处理只是将木质素溶解,并不能增加纤维素和半纤维素的水解程度。以硫酸作为催化剂,辐照15min后,在4.5h时乙酰丙酸产率能够达到30%。
The production rates of glucose and levulinic acid were investigated in the process of hydrolysis when peanut shell was regarded as biomass hydrolysis raw material, in which used sulfuric acid and hydrochloric acid as acid catalyst, and supersonic oscillation, lye processing, microwave ex- posure were choiced as pretreatment methods. The results indicated that the production rate of levu- linic acid might achieve 23% with weightloss rate of 57% after 3h, in which hydrochloric acid was uti- lized as primarily catalyst and 6 % of ferrous sulfate was added as promoter, through supersonic oscil- lated for lh. This was advantageous not only to the production of levulinic acid, but also to the reduc- tion of raw material. It was difficult for raw material to produce levulinic acid through lye processing, but weightloss rate was enhanced to above 60 %. It was obvious that lye processing could only dissolve the lignin, but could not promote the hydrolysis degree of cellulose and hemicellulose. The production rate of le- vulinic acid achieved 30% after 4.5h microwave exposure for 15rain when adopted sulfuric acid as catalyst.
出处
《花生学报》
2013年第1期53-58,共6页
Journal of Peanut Science
关键词
花生壳
酸水解
乙酰丙酸
peanut shell
acid hydrolysis
levulinic acid
