摘要
研究了反应时间、液固比和反应气氛对水解木质素超临界降解液化的影响。通过分析产物的分布、碳氢含量和碳基的转化率及收率,表明在超临界乙醇溶液中,水解木质素在10min内就能被降解液化,反应时间的延长会导致缩合反应的加剧;液固比以10:1为宜,液固比的降低容易导致水解木质素降解不完全,而更高的液固比虽可使油分的总收率略微提高,但是溶剂用量增加,同时结果表明这是由于溶剂与木质素降解产物的反应所致。无论是在惰性气氛还是在氢气气氛下,在超临界乙醇溶剂中催化液化的结果基本一致,氢气气氛的存在无助于木质素的降解,只在一定程度上由于氢气的解理而使缩合反应有所减少。
The effect of reaction time, ratio of solvent/HL and reaction of atmosphere on the liquefaction of HL under supercritical ethanol solution were depicted. It was indicated though analyzing the products yield ＆ distribution and HL conversion ＆ oil yield based on C, that 10min is preferred for the liquefaction of HL while longer time would intensify the condensation reaction; preferred ratio of solvent/HL was 10： 1, HL could not be depolyzed completely under less ratio while the condensation reaction between solvent and intermediate would be intensified under high ratio; the liquefaction results were coincided either under N2 or under H2 atmosphere, which indicated that H2 was not benefit for the liquefaction of HL.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2007年第7期805-809,共5页
Acta Energiae Solaris Sinica
基金
国家高新技术研究发展(863)计划(2001AA514021)
关键词
水解木质素
液化
超临界
hydrolytic lignin
liquefaction
supereritical
