Aspahltene reaction pathways. 3. Effect of reaction environment

Journal Article · · Energy Fuel; (United States)

OSTI ID:6272310

Savage, P E; Klein, M T; Kukes, S G

Asphaltenes precipitated from an off-shore California crude oil were subjected to pyrolysis and hydropyrolysis, both neat and in solvents, and catalytic hydroprocessing over Co/emdash/Mo/Al/sub 2/O/sub 3/. Reaction products were collected as gases, maltenes, residual asphaltenes, and coke, based on a solvent extraction were protocol. The yield of each product fraction was determined gravimetrically, and selected fractions were further characterized by GC, GC-MS, LC-ICP, and elemental analysis. The reaction environment altered both the kinetics and asphaltene disappearance and the selectivity to the gas, maltene, and coke product fractions. For instance, the apparent first-order rate constants for asphaltene disappearance at 400/degrees/C were between 0.025 and 0.030 min/sup -1/ for neat reactions and pyrolysis in toluene. The corresponding yields of coke were high (approx. 45%), and the selectivities to maltenes at 60 min were between 0.22 and 0.45. However, the rate of asphaltene and disappearance for pyrolysis in tetralin and hydropyrolysis in toluene was slower (k approx. 0.008 min/sup -1/), the selectivities to maltenes were much higher (e.g., approx. 0.8), and the induction time for coke formation was longer. The addition of a hydrotreating catalyst provided disappearance rate constants of about 0.020 min/sup -1/ and high selectivities (approx. 0.8) to maltenes and yields (approx. 60%) of maltenes.

• Research Organization: Univ. of Delaware, Newark (USA)
• OSTI ID: 6272310
• Journal Information: Energy Fuel; (United States), Journal Name: Energy Fuel; (United States) Vol. 2:5; ISSN ENFUE
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
023000 -- Petroleum-- Properties & Composition
ALKYLATED AROMATICS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
AROMATICS
ASPHALTENES
ASPHALTS
BITUMENS
CATALYSIS
CATALYSTS
CATALYTIC EFFECTS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
COBALT
DATA
DECOMPOSITION
ELEMENTS
EXPERIMENTAL DATA
HYDROCARBONS
INFORMATION
KINETICS
METALS
MOLYBDENUM
NUMERICAL DATA
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PYROLYSIS
REACTION KINETICS
SOLVENT PROPERTIES
TAR
TETRALIN
THERMOCHEMICAL PROCESSES
TOLUENE
TRANSITION ELEMENTS
YIELDS