2.4. Product analysis
The composition of the FAMEs dissolved in hexane solution was
analyzed with a gas chromatograph (Shimadzu GC-14B) equipped
with a flame ionization detector and a capillary column, Agilent
DB-17ht. Nitrogen was used as the carrier gas. The oven temperature
was initially held at 150 C for 2 min, heated at a rate of
10 C/min until reaching 250 C, and then held at 250 C for
5 min. The temperatures of the injector and detector were both
set at 50 C. The oil recovery was calculated according to Eq. (1):