摘要
为了提高生物质各组分的综合利用率,利用生物质经汽相酸水解生产糠醛的残渣制备乙酰丙酸,通过对4种反应条件下的糠醛残渣进行纤维素分析,汽相酸水解制糠醛过程中纤维素的转化率可低于10%,且水解过程糠醛收率高于70%,乙酰丙酸收率高于50%;此外提高酸浓度和压力虽然提高了半纤维素的转化率,但过度的加压和提高酸浓度反而不利于后续乙酰丙酸的制备.
In order to improve the comprehensive utilization of biomass components,furfural residue produced by vapour-phase-acid catalyzed hydrolysis can be used for the preparation of levulinic acid. We analyzed the cellulose of furfural residue in four different operating conditions. The results indicated that the conversion rates of cellulose in the production process of hydrolysis could be less than 10%,and in the process of hydrolysis reaction,the furfural yield is above 70%,the levulininc acid yield is above 50%. Enhancing the concentration of acid and reaction pressure could increase the conversion rate of hemicellulose,but overly adding concentration of acid and reaction pressure is not conductive to the preparation of levulinic acid.
出处
《河南科学》
2014年第4期611-615,共5页
Henan Science
基金
国家高技术研究发展计划(863计划)(2012AA051802)
关键词
汽相酸水解
糠醛残渣
纤维素分析
乙酰丙酸
vapour-phase-acid catalyzed hydrolysis
furfural residue
analysis of cellulose
levulinic acid
