Investigation of aqueous phase recycling for improving bio-crude oil yield in hydrothermal liquefaction of algae

Bioresource Technology
Yulin HuAmarjeet Bassi

Abstract

In this study, the aqueous phase obtained from catalytic/non-catalytic hydrothermal liquefaction (HTL) of Chlorella vulgaris was recycled as the reaction medium with an aim to reduce water consumption and increase bio-crude oil yield. Although both Na2CO3 and HCOOH catalysts have been proven to be effective for promoting biomass conversion, the bio-crude oil yield obtained from HTL with Na2CO3 (11.5wt%) was lower than that obtained from the non-catalytic HTL in pure water at 275°C for 50min. While, the HCOOH led to almost the same bio-crude yield from HTL (29.4wt%). Interestingly, bio-crude oil yield obtained from non-catalytic or catalytic HTL in recycled aqueous phase was much higher than that obtained from HTL in pure water. Recycling aqueous phase obtained from catalytic HTL experiments resulted in a sharp increase in the bio-crude oil yield by 32.6wt% (Na2CO3-HTL) and 16.1wt% (HCOOH-HTL), respectively.

Citations

Nov 27, 2018·Applied Microbiology and Biotechnology·Judit SandquistGonzalo Del Alamo Serrano
Oct 17, 2020·The Science of the Total Environment·Jayaseelan ArunArivalagan Pugazhendhi
Oct 14, 2018·Bioresource Technology·Yong HuangShu Zhang

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