Transfer hydrocracking of heavy oil and its model compound

Journal Article · · Energy and Fuels; (United States)

DOI:https://doi.org/10.1021/ef00029a020· OSTI ID:5383482

Aimoto, Kohjiroh; Nakamura, Ikusei; Fujimoto, Kaoru ^[1]

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1. Univ. of Tokyo (Japan)

Transfer hydrocracking of Kuwait atmospheric residue (RC-KW) and its model compounds with nickel supported on active carbon catalyst was examined under several reaction conditions. In the case of RC-KW cracking, the yield of asphaltene in product oil is very low (almost zero) with small amount of hydrogen consumption (100 m{sup 3}(STP)/kL of oil, kL = m{sup 3}), whereas coke yield is relatively high (about 10 wt%). As the hydrogen pressure increased, the level of hydrogen consumption and sulfur removal increased, while the coke yield and the conversion of residual oil decreased. These results suggest that transfer hydrocracking of residual oil is composed of thermal cracking of residual oil and hydrogen transfer from precoke compounds such as asphaltene which was adsorbed on active carbon surface to form coke and hydrogen atoms. In order to clarify the reaction mechanism, model reactions of diphenylpropane (DPP) as hydrogen acceptor with tetrahydronaphthalene (THN) or decahydronaphthalene (DHN) as hydrogen donor were conducted with Ni/AC (AC = active carbon) catalysts. Metal-free active carbon showed an activity for hydrogen-transfer reaction to some extent and supported Ni enhanced it, remarkably. With increasing hydrogen pressure, the level of dehydrogenation of hydrogen donor was decreased and the consumption of hydrogen was increased. These results suggest that hydrogen in the gas phase, on the active carbon surface, and in the hydrogen donor was able to move between these phase reversibly, by spillover and reverse spillover of hydrogen.

• OSTI ID: 5383482
• Journal Information: Energy and Fuels; (United States), Vol. 5:5; ISSN 0887-0624
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
NICKEL
CATALYTIC EFFECTS
PETROLEUM RESIDUES
HYDROCRACKING
ACTIVATED CARBON
ASPHALTENES
CATALYSIS
CATALYST SUPPORTS
CHEMICAL PREPARATION
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
COKE
DESULFURIZATION
EXPERIMENTAL DATA
HYDROGEN
HYDROGEN TRANSFER
HYDROGENATION
KUWAIT
RESIDUAL FUELS
THERMAL CRACKING
ADSORBENTS
ASIA
ASPHALTS
BITUMENS
CARBON
CHEMICAL REACTIONS
CRACKING
DATA
DECOMPOSITION
DEVELOPING COUNTRIES
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUEL OILS
FUELS
INFORMATION
KINETICS
LIQUID FUELS
METALS
MIDDLE EAST
NONMETALS
NUMERICAL DATA
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
PYROLYSIS
REACTION KINETICS
SYNTHESIS
TAR
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENTS
YIELDS
020400* - Petroleum- Processing