BioChem - DOS

An investigation of reaction pathways of hydrothermal liquefaction using Chlorella pyrenoidosa and Spirulina platensis

Energy conversion and management

Gai, C.; Zhang, Y.; Chen, W.T.; Zhang, P.; Dong, Y.

Low-lipid microalgae can be successfully converted to bio-crude oil in a hydrothermal liquefaction (HTL) environment. This study examined the behavior of hydrothermal liquefaction of two low-lipid content microalgae in subcritical water between 200<SUP>o</SUP>C and 320<SUP>o</SUP>C at 20<SUP>o</SUP>C intervals. Under these conditions, the chemical composition and functional groups for the bio-crude oil and aqueous fraction were analyzed. Results indicated that reaction temperature greatly affected the distribution of chemical composition and functional groups of HTL bio-crude oil and aqueous fraction. The bio-crude oil with a higher percentage of aliphatic functional groups was obtained at higher reaction temperatures (280-320<SUP>o</SUP>C). Besides, the aqueous fraction recovered under the same operating conditions had a lower concentration of nitrogenous organic compounds (NOCs) with two or more methyl groups. The general reaction network for HTL of low-lipid microalgae was proposed. The specific reaction pathways for microalgae substrates were analyzed in terms of lipid, protein and non-fibrous carbohydrate based on the spectral analysis.

2015

Pergamon ; Elsevier Science Ltd

0196-8904

96

pp.330-339

10.1016/j.enconman.2015.02.056

http://click.ndsl.kr/servlet/OpenAPIDetailView?keyValue=05787966&target=NART&cn=NART71902606

Biofuel; Chlorella; Spirulina; Low-lipid microalgae; Hydrothermal liquefaction