摘要
采用热化学直接液化方法处理螺旋藻,考察试验过程中温度、反应停留时间和压力3个参数对反应的影响,最终获取了生物质油。结果表明,当温度控制在270℃、停留30 min且不提供初始压力时,可获得较高的生物质油产量,产油率可以达到30.5%。
Microalgae have become a hot spot in the biofuel research because of their fast growth rates and the capability of CO2 fixation. Research on thermo-ehemical direct liquefaction of spirulina was cartied out and satisfied bio-oil yield was achieved. The mixture of spirulina, solvent and catalyst was loaded into a magnetic drove high- pressure reactor. The reactor was heated to achieve the experimental temperature and the temperature was constantly maintained for a cer- tain time. Gas product was removed from the reactor after the reaction and then the reactor was opened upon the completion of process. Raw oil product was separated from the remaining mixture by density varia- tion and the product was then dehydrated. In this research, the ef- fects of operating temperature, retention time and initial pressure on the process were investigated. The investigated ranges of these three parameters were 250 - 310℃ , 10 - 120 min and 0 - 1.0 MPa respectively. The experimental results showed that the operating temperature was the most significant parameter to affect the process and the impact of initial pressure was negligible. Bio-oil yield declined significantly when the operating temperature was above 290 ~C due to carbonization. Higher bio-oil yield was achieved when the operating temperature was about 270℃ and the retention time was 15 - 30 min. The highest yield recorded was 30.5% （dry spirulina powder）. Besides that, elemental analysis of the bio-oil products showed that the content of C and H in the bio-oil were close to those in raw-oil. Nevertheless, the content of N was slightly higher （6.093% and 4.188% in two samples, respectively） and required further treatment. This processing method provides a new approach for the reclamation of microalgae.
出处
《安全与环境学报》
CAS
CSCD
北大核心
2010年第6期19-21,共3页
Journal of Safety and Environment
基金
中国人民大学科学研究基金(中央基本科研业务费专项资金资助)项目(2010030130)
关键词
化学其他学科
生物质油
热化学转化
直接液化
微藻
other disciplines of chemistry
bio-oil
thermo-chemicalconversion
direct liquefaction
microalgac
