Fast pyrolysis of microalgae to produce renewable fuels
详细信息 查看全文
- 作者：Miao ; Xiaoling ; Wu ; Qingyu ; Yang ; Changyan
- 关键词：Microalgae ; Fast pyrolysis ; Bio-oil ; Renewable energy sources
- 刊名：Journal of Analytical and Applied Pyrolysis
- 出版年：2004
- 出版时间：June, 2004
- 年：2004
- 卷：71
- 期：2
- 页码：855-863
- 全文大小：130 K
文摘
In the present study, fast pyrolysis tests of microalgae were performed in the fluid bed reactor. The experiments were completed at temperature of 500°C with a heating rate of 600°Cs−1 and a sweep gas (N2) flow rate of 0.4m3h−1 and a vapour residence time of 2–3s. In comparison with the previous studies on slow pyrolysis from microalgae in an autoclave, a greater amount of high quality bio-oil can be directly produced from continuously processing microalgae feeds at a rate of 4gmin−1 in the present work, which has a potential for commercial application of large-scale production of liquid fuels. The liquid product yields of 18 and 24 % from fast pyrolysis of Chllorella protothecoides and Microcystis aeruginosa were obtained. The saturated and polar fractions account for 1.14 and 31.17 % of the bio-oils of microalgae on average, which are higher than those of bio-oil from wood. The H/C and O/C molar ratios of microalgae bio-oil are 1.7 and 0.3, respectively. The gas chromatograph analyses showed that the distribution of straight-chain alkanes of the saturated fractions from microalgae bio-oils were similar to diesel fuel. Bio-oil product from fast pyrolysis microalgae is characterized by low oxygen content with a higher heating value of 29MJ/kg, a density of 1.16kgl−1 and a viscosity of 0.10Pas. These properties of bio-oil of microalgae make it more suitable for fuel oil use than fast pyrolysis oils from lignocellulosic materials.