2 research outputs found
Compositional Characterization of Pyrolysis Fuel Oil from Naphtha and Vacuum Gas Oil
Steam cracking of crude oil fractions
gives rise to substantial
amounts of a heavy liquid product referred to as pyrolysis fuel oil
(PFO). To evaluate the potential use of PFO for production of value-added
chemicals, a better understanding of the composition is needed. Therefore,
two PFO’s derived from naphtha (N-PFO) and vacuum gas oil (V-PFO)
were characterized using elemental analysis, SARA fractionation, nuclear
magnetic resonance (NMR) spectroscopy, and comprehensive two-dimensional
gas chromatography (GC × GC) coupled to a flame ionization detector
(FID) and time-of-flight mass spectrometer (TOF-MS). Both samples
are highly aromatic, with molar hydrogen-to-carbon (H/C) ratios lower
than 1 and with significant content of compounds with solubility characteristics
typical for asphaltenes and coke (i.e. <i>n</i>-hexane insolubles).
The molar H/C ratio of V-PFO is lower than the one measured for N-PFO,
as expected from the lower molar H/C ratio of the VGO. On the other
hand, the content of <i>n</i>-hexane insolubles is lower
in V-PFO compared to the one in N-PFO (i.e., 10.3 ± 0.2 wt %
and 19.5 ± 0.5 wt %, respectively). This difference is attributed
to the higher reaction temperature applied during naphtha steam cracking,
which promotes the formation of poly aromatic cores and at the same
time scission of aliphatic chains. The higher concentrations of purely
aromatic molecules present in N-PFO is confirmed via NMR and GC ×
GC–FID/TOF-MS. The dominant chemical family in both samples
are diaromatics, with a concentration of 28.6 ± 0.1 wt % and
27.8 ± 0.1 wt % for N-PFO and V-PFO, respectively. Therefore,
extraction of valuable chemical industry precursors such as diaromatics
and specifically naphthalene is considered as a potential valorization
route. On the other hand, hydro-conversion is required to improve
the quality of the PFO’s before exploiting them as a commercial
fuel
MOESM1 of Petroselinic acid purification and its use for the fermentation of new sophorolipids
Additional file 1: Fig. S1. 1H-NMR spectrum for compound 1. Fig. S2. 13C-NMR spectrum for compound 1. Fig. S3. 1H-NMR spectrum for compound 5. Fig. S4. 13C-NMR spectrum for compound 5. Fig. S5. 1H-NMR spectrum for compound 7. Fig. S6. 13C-NMR spectrum for compound 7. Fig. S7. 1H-NMR spectrum for compound 8. Fig. S8. 13C-NMR spectrum for compound 8. Fig. S9. 1H-NMR spectrum for compound 9. Fig. S10. 13C-NMR spectrum for compound 9. Fig. S11. 1H-NMR spectrum for compound 4. Fig. S12. 13C-NMR spectrum for compound 4