Detailed analysis of polar compounds in Wilmington gas oil and hydrotreated products: Topical report

Technical Report · Mon Dec 01 04:00:00 EST 1986

OSTI ID:7175477

Sturm, Jr, G P; Green, J B; Tang, S K; Reynolds, J W; Yu, S K.T.

The feedstock and hydrotreated products from the 650 to 1000 F distillate of Wilmington crude were characterized by high performance liquid chromatographic separation procedures, routine chemical analyses, and spectroscopic methods including infrared gas chromatography/mass spectrometry and high resolution mass spectrometry. The hydrotreated samples were produced in a trickle bed reactor using a commercial catalyst at a hydrogen partial pressure of 1500 psig. Reaction temperatures were 375, 400, and 425 C; and the liquid hourly space velocity ranged from 0.5 to 1.5. Color, specific gravity, viscosity, sulfur content, and nitrogen content of the products decreased with increasing severity of hydrotreating. Reaction temperature was a more sensitive process variable than space velocity for the reaction conditions employed in these experiments. Stability tests on the feed and hydrotreated products showed mixed results. The less severely hydrotreated products produced more sediment than the feed, particularly at long storage times. Only the most severely hydrotreated products exhibited less production of sediment than the feed at all storage times. Weakly acidic compounds were the most resistant of the polar components to hydrotreating in these experiments. These compounds were primarily carbazoles, naphthenocarbazoles, dinaphthenocarbazoles, phenylcarbazoles, some structurally different nitrogen compound types, and weakly acidic oxygen compounds (probably aromatic ketones). The most prominent nitrogen compound type in the feed acid fraction (-21N Z-series, benzocarbazoles) was the fifth most abundant in the acid fractions from the two most severely hydrotreated samples. Within the various carbazole or pyrrolic benzolog compound types, the higher molecular weight, and thereby presumably more hindered, homologs were more resistant to hydrotreating. 10 refs., 38 figs., 15 tabs.

• Research Organization: National Inst. for Petroleum and Energy Research, Bartlesville, OK (USA)
• DOE Contract Number: FC22-83FE60149
• OSTI ID: 7175477
• Report Number(s): NIPER-152; ON: DE87001205
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400 -- Petroleum-- Processing
023000* -- Petroleum-- Properties & Composition
API GRAVITY
AROMATICS
AZAARENES
AZOLES
CARBAZOLES
CATALYSTS
CHEMICAL ANALYSIS
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CHROMATOGRAPHY
DATA
DENSITY
DISTILLATES
DISTILLATION
ENERGY SOURCES
EXPERIMENTAL DATA
FOSSIL FUELS
FUELS
GAS CHROMATOGRAPHY
HETEROCYCLIC COMPOUNDS
HIGH TEMPERATURE
HYDROGENATION
INFORMATION
INFRARED SPECTRA
LIQUID COLUMN CHROMATOGRAPHY
MASS SPECTROSCOPY
MEDIUM PRESSURE
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PETROLEUM
PETROLEUM DISTILLATES
PETROLEUM FRACTIONS
PHYSICAL PROPERTIES
POUR POINT
QUANTITATIVE CHEMICAL ANALYSIS
SEPARATION PROCESSES
SPECTRA
SPECTROSCOPY
STABILITY
STRUCTURAL CHEMICAL ANALYSIS
VISCOSITY