期刊
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
卷 51, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.algal.2020.102077
关键词
Crude glycerol; Phase separation; Co-hydrothermal liquefaction; Minimum fuel selling price
资金
- National Science Foundation, United States (NSF) ReNUWIT Energy Research Center [1028968]
- NSF New Mexico EPSCOR Energy New Mexico grant [1301346]
- New Mexico Water Resources Research Institute, United States [R16AC00002 GR0005116]
Crude glycerol was introduced into hydrothermal liquefaction of wastewater-grown algae, Galdieria sulphuraria, to improve yield and energy recovery of bio-crude oil, and to enable solvent-free oil/aqueous phase separation by gravity. Co-hydrothermal liquefaction of 5, 12.5, and 20 wt% solids loading algae and crude glycerol at 350 degrees C for 30 min gave bio-crude oil yields of 58.8 +/- 0.8, 65.5 +/- 1.5 and 56.2 +/- 1.5 wt%, compared to 14.6 +/- 0.1 wt% and 58.1 +/- 0.8 wt% for algae alone and crude glycerol alone, respectively. Solvent-free biocrude oil was upgraded into a liquid biofuel at a yield of 48.1 +/- 0.8 wt% and higher heating value of 43.7 +/- 0.1 MJ/kg. Incorporation of the co-hydrothermal liquefaction experimental yields and solvent-free phase separation into a techno-economic model for biofuels from hydrothermal liquefaction of algae resulted in a calculated minimum fuel sell price of $0.38-1.24 per liter gasoline equivalent, suggesting substantial potential for co-hydrothermal liquefaction of low-lipid algae with crude glycerol as a competitive strategy for economic 3rd generation biofuel production.
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