摘要
利用微波技术,以离子液体为微波吸收介质,对木屑进行低温裂解制取生物油,裂解获得的液体产物采用超临界CO2萃取技术将离子液体进行分离。对原料与吸收剂离子液体的比例、反应温度和反应时间进行了研究。结果表明,微波裂解最佳的工艺条件为:原料木屑与吸收剂离子液体质量比为3∶4,反应时间30 min,反应温度473 K,生物油收率21.22%。反应获得的生物油的组成采用FTIR,GCMS测试技术进行了分析,并采用氧气氛下的TGA曲线分析评价其燃烧性。结果表明,生物油的主要成分是带有含氧官能团的苯酚类、醛类、酮类等芳香族环状化合物。TGA结果表明,生物油具有较好的燃烧性能。
A low temperature method was used to obtain bio-oil from fir sawdust by means of microwave pyrolysis. Fir sawdust was mixed with a microwave absorption medium（ ionic liquid） in the pyrolysis process and super-critical CO2 extraction was used to separate the product. Effects of reaction temperature, ratios of the ionic liquid to fir, and reaction time on the yield of bio-oil were investigated, and the results show that the optimal processing conditions were that ratio of ionic liquid to fir sawdust was 4：3, reaction temperature was 200 ℃, and reaction time was 30 minutes. Yield of bio-oil can reach 21.22%. Bio-oil obtained was analyzed by GC-MS, FFIR, and TG-DTA, and the results revealed that product consisted of aromatic hydrocarbons, such as phenols, esters and acids. TG-DTA showed that the product was a fuel with good combustibility.
出处
《应用化学》
CAS
CSCD
北大核心
2009年第1期82-85,共4页
Chinese Journal of Applied Chemistry
基金
上海市优秀青年教师专项基金(99030306018)
上海市教委基金(10011105021)资助项目
