TY - JOUR
T1 - Hydrothermal liquefaction of harvested high-ash low-lipid algal biomass from Dianchi Lake
T2 - Effects of operational parameters and relations of products
AU - Tian, Chunyan
AU - Liu, Zhidan
AU - Zhang, Yuanhui
AU - Li, Baoming
AU - Cao, Wei
AU - Lu, Haifeng
AU - Duan, Na
AU - Zhang, Li
AU - Zhang, Tingting
N1 - Publisher Copyright:
© 2014 Elsevier Ltd.
PY - 2015/5/1
Y1 - 2015/5/1
N2 - Hydrothermal liquefaction (HTL) allows a direct conversion of algal biomass into biocrude oil, not only solving the environmental issues caused by the over-growing algae but also producing renewable energy. This study reports HTL of algae after separation from eutrophicated Dianchi Lake in China. Conversion efficiency was studied under different operational conditions via an orthogonal design, including holding temperature (HT) (260-340. °C), retention time (RT) (30-90. min) and total solid (TS) (10-20%). A highest biocrude oil yield (18.4%, dry ash-free basis, daf) was achieved at 300. °C, 60. min, and 20% (TS), due to the low contents of lipids (1.9%, daf) and proteins (24.8%, daf), and high contents of ash (41.6%, dry basis) and carbohydrates (71.8%, daf). Operational parameters significantly affected the biocrude yields, and chemical distribution of HTL products. The biocrude production also related to other HTL products, and involved chemical reactions, such as deoxygenation and/or denitrogenation.
AB - Hydrothermal liquefaction (HTL) allows a direct conversion of algal biomass into biocrude oil, not only solving the environmental issues caused by the over-growing algae but also producing renewable energy. This study reports HTL of algae after separation from eutrophicated Dianchi Lake in China. Conversion efficiency was studied under different operational conditions via an orthogonal design, including holding temperature (HT) (260-340. °C), retention time (RT) (30-90. min) and total solid (TS) (10-20%). A highest biocrude oil yield (18.4%, dry ash-free basis, daf) was achieved at 300. °C, 60. min, and 20% (TS), due to the low contents of lipids (1.9%, daf) and proteins (24.8%, daf), and high contents of ash (41.6%, dry basis) and carbohydrates (71.8%, daf). Operational parameters significantly affected the biocrude yields, and chemical distribution of HTL products. The biocrude production also related to other HTL products, and involved chemical reactions, such as deoxygenation and/or denitrogenation.
KW - Algal blooms
KW - Biocrude oil
KW - Deoxygenation and denitrogenation
KW - Hydrothermal liquefaction
KW - Product distribution
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U2 - 10.1016/j.biortech.2014.10.093
DO - 10.1016/j.biortech.2014.10.093
M3 - Article
C2 - 25466998
AN - SCOPUS:84928376036
SN - 0960-8524
VL - 184
SP - 336
EP - 343
JO - Bioresource Technology
JF - Bioresource Technology
ER -