Transition metal catalysis of hydrogen shuttling in coal liquefaction: Quarterly technical progress report, 9/1/86-11/30/86

Technical Report · Thu Jan 01 04:00:00 EST 1987

OSTI ID:6484564

Eisch, J J

Basic to both the liquefaction of coal and the purification of coal liquids is the transfer of hydrogen from such sources as dihydrogen, metal hydrides or partially reduced aromatic hydrocarbons to the extensive aromatic rings in coal itself or to aromatic sulfides, amines and ethers. Accordingly, this study is exploring how such crucial hydrogen-transfer processes might be catalyzed by soluble, low-valent transition metal complexes under moderate conditions of temperature and pressure. By learning the mechanism whereby H/sub 2/, metal hydrides or partially hydrogenated aromatics do transfer hydrogen to model aromatic compounds, under homogeneous transition-metal catalysis, we hope to identify new methods for producing superior fuels from coal. During the ninth quarter of this three-year grant the following aspects of this study were pursued: (a) the homogeneous, nickel(0)-catalyzed disproportionative hydrogen shuttling of such dihydroaromatics as dihydrobenzenes, dihydronaphthalenes and dihydroanthracene was further investigated; (b) the intermolecular hydrogen-shuttling of dihydroaromatics and acceptor molecules, such as polycyclic aromatics, aryl-substituted ethylenes and acetylenes and azaaromatics, has been examined for the operation of nickel(0) catalysis; (c) complexes of nickel(0) bearing a variety of ligands have been tested as catalysts for the thermal cleavage of benzylic carbon-carbon bonds; (d) the possibility of a synergistic catalysis of nickel(0) complexes and Lewis acids on hydrogen-shuttling has begun to receive our earnest attention.

• Research Organization: State Univ. of New York, Binghamton (USA)
• DOE Contract Number: FG22-84PC70786
• OSTI ID: 6484564
• Report Number(s): DOE/PC/70786-T9; ON: DE87011268
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL BONDS
CLEAVAGE
COAL LIQUEFACTION
COMPLEXES
CRYSTAL STRUCTURE
ELEMENTS
HYDROGEN TRANSFER
LIQUEFACTION
METALS
MICROSTRUCTURE
NICKEL
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENTS