[The mechanisms of hydrogen incorporation in coal liquefaction]
In earlier reports we have describe d our efforts to understand the mechanism of deuterium incorporation during the thermolysis of 1,2-diphenylethane and 2,2,5,5-tetramethyl-3,4-diphenylhexane under D[sub 2] gas in a glass vessel. We have reported that in both of these cases, there is substantial deuterium incorporation. A summary of our conclusions follows: Conclusions previously reported for the 1,2-diphenylethane (DPE) system. 1. Benzyl radicals produced in the thermolysis react mainly with DPE to extract a hydrogen atom and produce undeuterated toluene. 2. The 1,2-diphenylethyl radicals produced are mainly responsible for the reaction with D[sub 2] to give D atoms. 3. D atoms then react with aromatic rings to form adduct radicals which are, at least in part, reconverted to D-substituted aromatics in termination steps. 4.2-Phenylethyl radicals react in a less discriminating manner, 1/3 to 1/2 of the events probably involving direct reaction with D[sub 2]. 5. A reasonable match to major product distribution can be accomplished using a model consisting of the set of ten reactions.
- Research Organization:
- Kentucky Univ., Lexington, KY (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG22-91PC91291
- OSTI ID:
- 7096496
- Report Number(s):
- DOE/PC/91291-T6; ON: DE93009655
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COAL LIQUIDS
PYROLYSIS
CHEMICAL REACTIONS
DEUTERIUM
PROGRESS REPORT
STRUCTURAL MODELS
TRACER TECHNIQUES
DECOMPOSITION
DOCUMENT TYPES
FLUIDS
HYDROGEN ISOTOPES
ISOTOPE APPLICATIONS
ISOTOPES
LIGHT NUCLEI
LIQUIDS
NUCLEI
ODD-ODD NUCLEI
STABLE ISOTOPES
THERMOCHEMICAL PROCESSES
010405* - Coal
Lignite
& Peat- Hydrogenation & Liquefaction