Bioenergy is the upcoming energy source to be a potential substitute for fossil fuels. It is also considered as a carbon–neutral fuel. Hydrothermal liquefaction is an economical process to convert wet biomass into liquid fuels. However, it requires higher temperatures with relatively less bio-oil yields than using additional ethanol for liquefaction. With 50/50 ethanol/water, the bio-oil yield of liquefaction of chlorella jumps from 37.7% in water to 61.7% in water/ethanol at 250°C. In addition, the gasoline and diesel range fuels in these bio-oils increase from 39.7% in water to 49.8% in ethanol/water. CHNOS analysis results indicate that bio-oils still contain high percentages of N and O compounds but with good HHVs from 29 to 36 kJ/g. GC-MS results suggest that solvent impacted production distribution significantly, but the effect of reaction time or catalyst is marginal.  Overall, the advantage of using ethanol in addition to water is significant, it increases not only the bio-oil yield from liquefaction but also the quality of bio-oils at lower reaction temperatures.<br/>

Liquefaction of chlorella using ethanol and/or water

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.