Exploratory study of coal-conversion chemistry. Quarterly report No. 5, May 19, 1982-August 18, 1982
Initial runs of coal liquefaction products through the automatically switched, multicolumn, solvent-extraction/high-pressure liquid chromatography systems have been performed. This separation was followed by field ionization mass spectrometric analysis of the volatile portions of each of the separated fractions. The separation scheme is described, and results of one of the initial separations are summarized. The FIMS spectrum of one of the fractions (lower molecular weight nitrogen heterocycles) is presented and the types of information available from this less-than-ideal case (i.e., broad HPLC fraction) are discussed in the context of the objective of this subtask. We studied the thermolysis of bibenzyl in D/sub 2/O at 400/sup 0/C. The major products were toluene and stilbene. Minor products were benzene, ethylbenzene, styrene, diphenylmethane, and phenanthrene. The recovered bibenzyl and products contained significant quantities of deuterium. From the degree of deuterium incorporation, a statistical determination for a simple series of consecutive exchange reactions was derived. The reaction scheme involves an initial slow homolysis of the starting bibenzyl to yield benzyl radical, which, in turn, reacts with D/sub 2/O to form OD. OD then rapidly reacts with bibenzyl to yield bibenzyl radical, and the formed bibenzyl radical abstracts deuterium from the medium to form products. The chemistry suggested here demonstrates that water can act as an H-donor because it readily transfers hydrogen to organic free radicals. We further suggest that water can generate hydrogen atoms if CO is present.
- Research Organization:
- SRI International, Menlo Park, CA (USA)
- DOE Contract Number:
- AC22-81PC40785
- OSTI ID:
- 6800666
- Report Number(s):
- DOE/PC/40785-5; ON: DE83002456
- Country of Publication:
- United States
- Language:
- English
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Thermolysis of bibenzyl: roles of sulfur and hydrogen sulfide
Exploratory study of coal-conversion chemistry. Quarterly report No. 4, February 19-May 18, 1982
Related Subjects
010405* -- Coal
Lignite
& Peat-- Hydrogenation & Liquefaction
010600 -- Coal
Lignite
& Peat-- Properties & Composition
AROMATICS
BENCH-SCALE EXPERIMENTS
BIBENZYL
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
CHEMISTRY
CHROMATOGRAPHY
COAL LIQUEFACTION
COAL LIQUIDS
DATA
DECOMPOSITION
DEUTERIUM COMPOUNDS
EXPERIMENTAL DATA
EXTRACTION
FLUIDS
FRACTIONATION
HYDROGEN COMPOUNDS
INFORMATION
ISOTOPE APPLICATIONS
ISOTOPIC EXCHANGE
LIQUEFACTION
LIQUID COLUMN CHROMATOGRAPHY
LIQUIDS
MASS SPECTROSCOPY
NUMERICAL DATA
ORGANIC COMPOUNDS
PH VALUE
PYROLYSIS
SEPARATION PROCESSES
SOLVENT EXTRACTION
SPECTROSCOPY
STRUCTURAL MODELS
THERMOCHEMICAL PROCESSES
TRACER TECHNIQUES