Optimization to Hydrothermal Liquefaction of Low Lipid Content Microalgae Spirulina sp. Using Response Surface Methodology

Table 7

Major chemical compositions of bio-oil from hydrothermal liquefaction of fresh Spirulina sp. biomass at the concentration of 10.5%, temperature of 357°C, and holding time of 37 min.

Number	RT (min)	Name of compounds	Molecular formula	Area (%)
1	15.95	Octane, 2,4,6-trimethyl	C19H40	2.78
2	19.84	1,2-Bis(benzoyloxy)benzene	C20H18O2	2.81
3	29.97	Eicosane	C20H42	1.71
4	23.51	Decane, 3-ethyl-3-methyl	C18H38	1.98
5	24.07	Octane, 5-ethyl-2-methyl	C19H40	2.54
6	31.01	Hexacosane	C26H54	2.46
7	31.52	Phenol, 2,4-bis(1,1-dimethylethyl)	C14H22O	2.90
8	36.85	Heptadecane	C17H36	3.17
9	40.06	Naphthalene, 2,7-dimethyl	C13H23NO4	4.11
10	44.33	Hexadecanoic acid, ethyl ester	C18H36O2	1.67