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Microwave-assisted pyrolysis of microalgae for biofuel production |
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| Authors: | Du Zhenyi Li Yecong Wang Xiaoquan Wan Yiqin Chen Qin Wang Chenguang Lin Xiangyang Liu Yuhuan Chen Paul Ruan Roger |
| Institution: | a Center for Biorefining and Department of Bioproducts and Biosystems Engineering, University of Minnesota, 1390 Eckles Ave., St. Paul, MN 55108, United States b Biomass Energy Center and State Key Laboratory of Food Science, Nanchang University, Nanchang 330031, China c College of Biological Science and Technology, Fuzhou University, Fuzhou 350002, China |
| Abstract: | The pyrolysis of Chlorella sp. was carried out in a microwave oven with char as microwave reception enhancer. The results indicated that the maximum bio-oil yield of 28.6% was achieved under the microwave power of 750 W. The bio-oil properties were characterized with elemental, GC-MS, GPC, FTIR, and thermogravimetric analysis. The algal bio-oil had a density of 0.98 kg/L, a viscosity of 61.2 cSt, and a higher heating value (HHV) of 30.7 MJ/kg. The GC-MS results showed that the bio-oils were mainly composed of aliphatic hydrocarbons, aromatic hydrocarbons, phenols, long chain fatty acids and nitrogenated compounds, among which aliphatic and aromatic hydrocarbons (account for 22.18% of the total GC-MS spectrum area) are highly desirable compounds as those in crude oil, gasoline and diesel. The results in this study indicate that fast growing algae are a promising source of feedstock for advanced renewable fuel production via microwave-assisted pyrolysis (MAP). |
| Keywords: | Microwave-assisted pyrolysis Microalgae Chlorella sp Bio-oil |
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