Investigation
on Pyrolysis of Low Lipid Microalgae Chlorella vulgaris and Dunaliella
salina
Xun Gong
Biao Zhang
Yang Zhang
Yongfu Huang
Minghou Xu
10.1021/ef401500z.s001
https://acs.figshare.com/articles/journal_contribution/Investigation_on_Pyrolysis_of_Low_Lipid_Microalgae_Chlorella_vulgaris_and_Dunaliella_salina/2027676
Chlorella vulgaris and Dunaliella salina are two kinds
of microalgae, which
are widely distributed in China. Thermal decomposition of low-lipid C. vulgaris and D. salina were performed using thermogravimetric analysis. The effect of heating
rates on pyrolytic characteristics was investigated, and thermal decomposition
kinetics was determined as well. Furthermore, pyrolysis experiments
were carried out on a fixed-bed reactor. The gas, char, and tar yields
were analyzed, and the mass balance was from 88.4 to 96.8%. C. vulgaris had higher H<sub>2</sub> yields and lower
CH<sub>4</sub> yields than D. salina during pyrolysis. The theoretical calorific value of the pyrolytic
gas of D. salina was higher than that
of C. vulgaris because D. salina had a higher amount of high heating value
components, such as C<sub>2</sub>H<sub>6</sub>, C<sub>2</sub>H<sub>4</sub>, and C<sub>2</sub>H<sub>2</sub>. The biochar from microalgae
had a smaller Brunauer–Emmett–Teller surface area than
the char from pyrolysis of lignocellulosic biomass. Highest yields
of pyrolytic oil were 49.2 and 55.4% (water-free basis) for C. vulgaris and D. salina at 500 °C, respectively. The characteristics of bio-oil from
microalgae pyrolysis, including water content, density, acidity, and
heating value, were investigated as well as the chemical composition
at different pyrolysis temperatures. The microalgae pyrolytic oil
was found to have significant levels of alkanes, alkenes, alkines,
and esters and be particularly high in nitrogenous compounds. In comparison
to the bio-oils from common lignocellulosic biomass, the microalgae
oil had lower oxygen and water contents, a lower total acid number,
and a higher heating value.
2015-12-17 00:14:50
H 2 yields
lignocellulosic biomass
microalgae pyrolytic oil
Low Lipid Microalgae Chlorella vulgaris
CH 4 yields
heating value components
C 2H C 2H
pyrolysi
heating value
Dunaliella salinaChlorella vulgaris