Optimization of hydrothermal co-liquefaction of seaweeds with lignocellulosic biomass: Merging 2nd and 3rd generation feedstocks for enhanced bio-oil production

Chuan Yuan, Shuang Wang, Bin Cao, Yamin Hu, Abd El-Fatah Abomohra, Qian Wang, Lili Qian, Lu Liu, Xinlin Liu, Zhixia He, Chaoqun Sun, Yongqiang Feng and Bo Zhang

Energy, 2019, vol. 173, issue C, 413-422

Abstract: The present work aimed to explore the optimized conditions of hydrothermal co-liquefaction (co-HTL) of the green seaweed “Enteromorpha clathrata (EN)” and the lignocellulosic agricultural waste “rice husk (RH)”. Separate hydrothermal liquefaction (HTL) of EN and RH showed bio-oil yields of 26.0% and 45.6%, respectively. However, co-HTL under optimized conditions showed significant increase in the bio-oil yield by 71.7% over that of EN, and insignificant difference with that of RH. Nevertheless, the conversion ratio of co-HTL showed 10.6% significant increase over that of RH. GC-MS results showed that main compounds of EN and RH bio-oil lump into the C15–C20 and C5–C12 regions, mainly representing carbon range of diesel and gasoline, respectively. Short-chain (C5–C12) and long-chain (C14–C20) compounds in the bio-oil obtained by co-HTL represented 72% and 28%, respectively. In addition, the ratio of aromatic compounds in the bio-oil of RH was reduced by 9.3% as a result of co-HTL. In conclusion, results suggested 50% ethanol as a co-solvent, 300 °C and 45 min as optimum conditions for co-HTL of EN:RH (1:1 w/w). The present study demonstrated an efficient route for co-HTL of 3rd generation feedstocks with 2nd generation feedstocks which will have a significant impact on large-scale applications.

Keywords: Optimization; Seaweeds; Lignocelluloses; Co-liquefaction; Crude bio-oil (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (18)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:173:y:2019:i:c:p:413-422

DOI: 10.1016/j.energy.2019.02.091

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