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- W249626708 abstract "In an attempt to gain a better understanding of the role of free radicals in the liquefaction and pyrolysis reactions of coal, electron spin resonance (ESR) spectroscopy was used to study the free radicals in a variety of coals and vacuum pyrolyzed coals, in the various product components from the solvent refined coal (SRC-1) process, and in a variety of coal solvent slurries reacted under a variety of conditions. Data from 45 experiments using Powhatan number5 coal to screen the major process variables, such as solvent, temperature, gas type, pressure, and heating time are summarized and were used to formulate a regression model to sort out the major effects and their interactions. Reaction time was the only insignificant variable. Results of further studies on temperature effects and solvent type are included. From the results of the full correlative model, temperature, solvent and residence time and their interactions were found to account for about 90% of the effects noted in the free radical concentration. (BLM)" @default.
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- W249626708 date "1981-01-01" @default.
- W249626708 modified "2023-09-23" @default.
- W249626708 title "In-situ experimental observation and predictive model of free radical formation under liquefaction regime conditions" @default.
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