Reactivity of Cold Lake asphaltenes

Conference · Tue Jan 01 04:00:00 EST 1980 · Am. Chem. Soc., Div. Fuel Chem., Prepr.; (United States)

OSTI ID:6813355

Schucker, R C; Keweshan, C F

Experimental evidence have been presented which supports the concept that Cold Lake asphaltenes have somewhat large, hydrogen-deficient core structures to which are attached alkyl side chains and highly substituted aromatic groups. Sulfur tends to be relatively evenly distributed between the core structure and the peripheral groups and nitrogen is concentrated predominantly in the core. The overall picture of asphaltene reactivity that has emerged from this is shown schematically in Figure 10. During mild hydroconversion, weaker linkages are thermally broken resulting in the formation of maltenes having a higher (H/C) and reacted asphaltenes having a lower (H/C). Some alkyl side chains are also lost predominantly by ..beta..-scission. In the absence of effective hydrogen transfer, some of these reaction fragments can recombine to form coke. With improved hydrogen transfer the coking reactions can be significantly delayed. Total conversion of asphaltenes to maltenes would at this point seem to be an improbable goal; however, more research is needed in order to see how far the structural concepts developed here for Cold Lake asphaltenes can be generalized to others.

• Research Organization: Exxon Research and Engineering Co., Linden, NJ
• OSTI ID: 6813355
• Report Number(s): CONF-800814-P2
• Conference Information: Journal Name: Am. Chem. Soc., Div. Fuel Chem., Prepr.; (United States) Journal Volume: 25:3
• Country of Publication: United States
• Language: English

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02 PETROLEUM
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ABSORPTION SPECTROSCOPY
ACTIVATION ANALYSIS
ACTIVATION ENERGY
ARRHENIUS EQUATION
ASPHALTENES
ASPHALTS
BARYON REACTIONS
BITUMENS
CARBON
CATALYTIC EFFECTS
CHEMICAL ANALYSIS
CHEMICAL COMPOSITION
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CRACKING
DECOMPOSITION
ELEMENTS
ENERGY
ENERGY SOURCES
EQUATIONS
FOSSIL FUELS
FUELS
HADRON REACTIONS
HIGH TEMPERATURE
HYDROCRACKING
HYDROGEN
KINETICS
MANGANESE
MEDIUM PRESSURE
METALS
MOLYBDENUM
NEUTRON REACTIONS
NICKEL
NITROGEN
NMR SPECTRA
NONMETALS
NUCLEAR REACTIONS
NUCLEON REACTIONS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXYGEN
PETROLEUM
PYROLYSIS
QUANTITATIVE CHEMICAL ANALYSIS
REACTION KINETICS
REFRACTORY METALS
SPECTRA
SPECTROSCOPY
SULFUR
TAR
TEMPERATURE DEPENDENCE
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS
VANADIUM