Investigation of hydrogen transfer in coprocessing using model systems

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:214763

Shen, J; Curtis, C W ^[1]

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1. Auburn Univ., AL (United States)

Coprocessing of coal with petroleum resid involves the reaction of two very different materials: coal is aromatic and resid is naphthenic. Hydrogen transfer is an important mechanism in most coal liquefaction systems. When coal is reacted with a coal-derived solvent, a high hydroaromatic content capable of transferring hydrogen in the solvent is desirable for achieving the desired coal conversions. But, resids tend to be naphthenic rather than hydroaromatic in character. The current study evaluated the reactivity of naphthenic compounds as models for resids in the presence of aromatic acceptors that are representative of the coal structure. The model donor used was perhydropyrene and the model acceptors were phenanthrene and anthracene. Thermal and catalytic reactions were performed at 400 and 440{degrees}C for 30 min in a H{sub 2} or N{sub 2} atmosphere with 1:1 and 5:1 ratios of model donor to model acceptor and with slurry phase catalysts, Mo naphthenate and Ni octoate. In reactions containing anthracene, the presence of perhydropyrene had increased the total amount of hydrogen being accepted by anthracene, while excess perhydropyrene was required to increase the hydrogen accepted by the model phenanthrene. Catalysis by Mo naphthenate promoted hydrogen transfer from perhydropyrene to anthracene, but catalysis by Ni octoate did not.

• OSTI ID: 214763
• Report Number(s): CONF-950801--
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
02 PETROLEUM
ANTHRACENE
CATALYSIS
CATALYTIC EFFECTS
COAL
COAL LIQUEFACTION
COPROCESSING
HYDROGEN TRANSFER
MOLYBDENUM COMPOUNDS
NICKEL COMPOUNDS
PETROLEUM RESIDUES
PHENANTHRENE