Composition of heavy petroleums. 1. Molecular weight, hydrogen deficiency, and heteroatom concentration as a function of atmospheric equivalent boiling point up to 1400 F (760 C)

Journal Article · · Energy Fuel; (United States)

DOI:https://doi.org/10.1021/ef00001a001· OSTI ID:6565954

Boduszynski, M M

The objective of this paper is to illustrate the variation of molecular weight, hydrogen deficiency, and heteroatom concentrations as functions of the atmospheric equivalent boiling point (AEBP). Short-path distillation (DISTACT) combined with the sequential elution fractionation (SEF) method was used to separate atmospheric residues derived from various petroleums into fractions having progressively higher AEBPs extending up to approximately 1400 F (760 C). Molecular weight measurements by field ionization (FI) and field desorption (FD) mass spectrometry (MS), concentrations of S, N, O, V, Ni, and Fe, and the atomic H/C ratio are all reported as a function of the AEBP. The experimental evidence contradicts a common opinion that heavy petroleums, and residues in particular, are composed mostly of very high molecular weight components. The results reveal a broad molecular weight distribution pattern for the atmospheric residue from each crude oil and demonstrate that most heavy petroleum components do not exceed a molecular weight of approximately 2000. Data show that the heteroatom concentrations and hydrogen deficiency both increase with increasing AEBP. Significant bimodal distribution patterns for V and Ni were observed. The distribution profiles for S, N, and metals suggest that these constituents probably occur in the same molecular structures. 20 references, 16 figures, 1 table.

• Research Organization: Chevron Research Co., Richmond, CA
• OSTI ID: 6565954
• Journal Information: Energy Fuel; (United States), Vol. 1:1
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
PETROLEUM
BOILING POINTS
MOLECULAR WEIGHT
MULTI-ELEMENT ANALYSIS
PETROLEUM RESIDUES
CARBON
DISTRIBUTION
HYDROGEN
IRON
MASS SPECTROSCOPY
NICKEL
NITROGEN
OXYGEN
SEPARATION PROCESSES
SULFUR
VANADIUM
VISCOSITY
CHEMICAL ANALYSIS
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
METALS
NONMETALS
PETROLEUM FRACTIONS
PHYSICAL PROPERTIES
SPECTROSCOPY
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENTS
TRANSITION TEMPERATURE
023000* - Petroleum- Properties & Composition