摘要
本文以Co2O3为催化剂,选取五因素五水平的正交试验对甘蔗渣碱木素催化湿空气氧化降解进行了研究,并就不同因素对主要降解产物浓度的影响做了分析。结果表明,蔗渣碱木素降解后的主要产物是香草醛、丁香醛和对羟基苯甲醛,且三种主要产物的浓度占9种产物总浓度的近50%;综合考虑降解产物浓度、制备成本、设备要求等诸多方面的因素,优选出蔗渣碱木素最佳的降解工艺条件是:压力2.0MPa,木素浓度40g/L,碱液浓度1.0mol/L,温度190℃,降解时间50min。通过正交试验的极值分析和F检验分析来看,对主要产物浓度及9种降解产物总浓度影响因素从主要到次要依次为:压力,木素浓度,碱液浓度,反应温度和时间。
Orthogonal experiment is carried out to find out the optimal conditions and the key influencing factors during bagasse alkaline lignin degradation by Catalytic Wet Air Oxidation（CWAO）with Co2O3 as catalyst.The experimental results show that vanillin,syringaldehyde and p-hydroxybenzaldehyde are the main products,and these 3 major products concentration accounts for nearly 50% of total concentration of 9 products;the most optimal level combination is alkali concentration of 1 mol/L,lignin concentration of 40 g/L,top temperature of 170℃,total pressure of 2.0 MPa and reaction time of 50 min.The most important influencing factor on the concentration of the 3 main products is the total pressure,the next are lignin concentration,alkali concentration,top temperature,and the least important one is reaction time.
出处
《造纸科学与技术》
北大核心
2011年第3期30-34,共5页
Paper Science & Technology
基金
国家自然科学基金(30972324)资助项目
关键词
碱木素
催化湿空气氧化法
降解
正交试验
bagasse alkaline lignin
catalytic wet air oxidation
degradation
orthogonal tests
