期刊
BIORESOURCE TECHNOLOGY
卷 252, 期 -, 页码 28-36出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2017.12.067
关键词
Algae; Hydrothermal liquefaction; Bio-oil; Catalytic upgrading; Hydrodenitrogenation
资金
- United States National Science Foundation [NSF-CBET- 1333372]
- Alabama Agricultural Experiment Station [ALA014-1-13006]
- Auburn University-Intramural Grant Program [AU-IGP-150200]
- NSF Alabama-EPSCoR's Graduate Research Scholars Program [GRSP-2016-11]
Upgrading of bio-oil obtained from hydrothermal liquefaction (HTL) of algae is necessary for it to be used as a fuel. In this study, bio-oil obtained from HTL of Nannochloropsis sp. was upgraded using five different catalysts (Ni/C, ZSM-5, Ni/ZSM-5, Ru/C and Pt/C) at 300 degrees C and 350 degrees C. The upgraded bio-oil yields were higher at 300 degrees C; however, higher quality upgraded bio-oils were obtained at 350 degrees C. Ni/C gave the maximum upgraded bio-oil yield (61 wt%) at 350 degrees C. However, noble metal catalysts (Ru/C and Pt/C) gave the better upgraded bio-oils in terms of acidity, heating values, and nitrogen values. The higher heating value of the upgraded bio-oils ranged from 40 to 44 MJ/kg, and the nitrogen content decreased from 5.37 to 1.29 wt%. Most of the upgraded bio-oils (35-40 wt%) were in the diesel range. The major components present in the gaseous products were CH4, CO, CO2 and lower alkanes.
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