Energize New Mexico
National Science Foundation
Algae-derived biofuels have attracted significant interest due to the superiorities of not competing with land for food production, abilities to clean contaminated water, higher growth rates, and strong CO2-mitigation abilities. In the last two decades, most researches have focused on hydrothermal liquefaction (HTL) of whole, wet algal biomass in batch reactors. To develop commercial scale operations, a significant technological shift from batch to continuous reactor systems is inevitable. In this study, char-free biocrude oil production from HTL of wastewater treatment (WWT) microalgae in a pilot-scale continuous flow reactor (CFR) were reported. Results showed the CFR system was able to run an algal slurry with a solid loading of 5 wt.% under 350 Â°C and 17 MPa for 4 hours without clogging issue. The biocrude oil yield of 28.1 wt.% (daf.) has been reached with HHVs of 38-39 MJ/kg. The chemistry of biocrude oil was analyzed by high-resolution Fourier transform mass spectroscopy (FT-MS), proton nuclear magnetic resonance spectroscopy (1H NMR), Fourier transform infrared spectroscopy (FT-IR), etc. The characterization result showed that the quality of light biocrude oil produced from CFR system was comparable to that from the batch reactor in terms of molecular structures.
Brewer, Catherine. "Characterization of Biocrude Oil Produced from Hydrothermal Liquefaction of Wastewater-Treatment Microalgae in A Pilot-Scale Continuous Flow Reactor." (2018). https://digitalrepository.unm.edu/energizenm/669