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- W23716059 abstract "The use of H-donors to increase yields of distillable liquids in direct coal liquefaction is well-documented. Several mechanisms have been proposed including the radical-trapping of hydrogen from the H-donors. Another mechanism suggested on the basis of thermochemical data is a transfer of a hydrogen atom (radical) to an aromatic compound. This transfer is energetically favorable when specific atoms in the aromatic molecule are attacked. Phenanthrene, for example, is stabilized by 38 kcal/mole when attacked by a hydrogen radical to form the 9-hydrophenanthryl radical. This addition of hydrogen has not been studied to any extent at either of the model compound level or the process level. Another reaction which may resemble the radical addition reaction was observed when 1,1'-binaphthyl was heated with an H-donor to form the thermally stable perylene (PER). An H-donor was essential for coupling and different H-donors produced perylene in different yields. This reaction was used to study the relative ability of an H-donor to transfer its hydrogens at the high temperatures and pressures used in liquefaction. The coupling reaction appeared to have potential as a system to study this variety of H-transfer which may have important implications in the direct coal liquefaction process. Preliminary results indicate dibenzophenanthrenemore » might have distinct advantages over binaphthyl or o-terphenyl and would provide a very promising system to apply to the study of H-transfer reactions.« less" @default.
- W23716059 created "2016-06-24" @default.
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- W23716059 date "1983-01-01" @default.
- W23716059 modified "2023-09-28" @default.
- W23716059 title "Use of o-terphenyl and dibenzo(c,g)phenanthrene to study H-donor solvents" @default.
- W23716059 hasPublicationYear "1983" @default.
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