摘要
针对生物油的化学组成特点,以降低酸性和提高燃烧热为目标,采用催化酯化方法提质生物油。具体方法为:采用微波加热,以732型阳离子交换树脂为催化剂,添加乙醇进行催化酯化反应。适宜的反应条件为:催化剂1.5g,乙醇10mL,生物油5mL,反应时间30min,反应温度70℃,在该条件下乙酸转化率达到62.3%。根据GC-MS分析,提质后生物油的组分得到明显优化,除羧酸转化成酯类外,酮类、醛类和酚类等对生物油性能不利的组分都不同程度被转化。提质后生物油的运动黏度降至粗生物油的70.2%,而燃烧热则比粗生物油提高了17.24%。微波加热与水浴加热相比,达到最大乙酸转化率的时间缩短了约2/3。
According to composition of crude bio-oil, a method for upgrading the crude bio-oil to reduce its acidity and heighten its heating value was brought forward. The crude bio-oil was upgraded through esterification with ethanol using 732#cation exchange resin as catalyst and microwave heating. The crude bio-oil and the upgraded bio-oil were analyzed by means of GC-MS and the results indicated that the performances of the bio-oil were improved greatly after the upgrading. Under the optimal conditions： catalyst 1.5 g, ethanol 10 mL, crude bio-oil 5 mL, reaction time 30 min and reaction temperature 70 ℃, acetic acid conversion was 62.3 %.. The contents of the adverse components such as acids, ketones, aldehydes and phenols contained in the crude bio-oil reduced after the upgrading process. The kinematical viscosity of the upgraded bio-oil decreased by 29.8% and its heating value increased by 17. 24% after the upgrading. Furthermore, microwave heating could promote the upgrading process more effectively than traditional water-bath heating.
出处
《石油化工》
CAS
CSCD
北大核心
2010年第1期13-16,共4页
Petrochemical Technology
基金
国家重点基础研究发展计划项目(2007CB210204)
关键词
生物油
催化酯化
提质
阳离子交换树脂
微波
bio-oil
catalytic esterification
upgrading
cation exchange resin
microwave
