Page 253 - Biofuels Refining and Performance

Cracking of Lipids for Fuels and Chemicals 233

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Figure 8.10 GC pattern of Y-zeolite conversion product of animal fat at reaction tem-
perature T 400 C. GC-14A Shimadzu, column: FS-Supreme-5/H53, 30 m; temperature
program: 50 C (5 min); 15 C/min to 320 C (10 min); FID detector at 320 C.

These spectroscopic findings are confirmed by gas chromatogra-
phy (GC) [56]. Pyrolyzates (see Fig. 8.10) and commercial diesel
(see Fig. 8.11) have a similar GC pattern. However, crude conversion
products contain more volatile hydrocarbons.
GC separation on an OV101 capillary [column: 20 m 0.3 mm, split
1:25; temperature program: 25 C (2 min), 4 C/min to 320 C] reveals
double peaks in more detail (see Fig. 8.12). The first peak is for the
alkene with a double bond of a given C number. The second peak is for
the alkane having the same C number.

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Figure 8.11 GC pattern of commercial diesel. GC-14A Shimadzu, column: FS-Supreme-
5/H53, 30 m; temperature program: 50 C (5 min); 15 C/min to 320 C (10 min); FID
detector at 320 C.