A study of depolymerization and crosslinking reactions in coal liquefaction: Eighth quarterly report, June 1, 1987-August 31, 1987

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

OSTI ID:5759700

Solomon, P R; Serio, M A; Deshpande, G V

The major goal is to characterize the depolymerization and crosslinking reactions of low rank coals and determine how they can be optimized in liquefaction by combining high heating rates with solvent interactions. High heating rates are achieved by using a heated tube reactor. Crosslinking and depolymerization reactions are also being studied by using polymers to simulate the chemistry occurring in coal. A new batch of piperidine swelled lignite was made for pyrolysis studies in the heated tube reactor. About 26% of piperidine was incorporated into the lignite. Chars of carboxylated poly(2,6 dimethyl 1,4 phenylene oxide) and poly (2,5 dihydroxy 1,4 p-xylylene) were analyzed for functional group composition by quantitative FT-IR spectroscopy and for crosslink densities using solvent swelling with pyridine. For chars of the carboxyl polymer, there is a clear correlation between the decrease in intensity in the C = 0 stretch and the loss in solvent swelling. A similar decrease in the solvent swelling for hydroxyl polymer chars was not observed. Rank dependence on various output parameters of the FG-DVC model were obtained for a pyrolysis simulation. A correlation between degree of crosslinking prior to tar evolution and amount of tar evolved, the molecular distribution of the tar and char fluidity was obtained. 2 refs., 5 figs.

• Research Organization: Advanced Fuel Research, Inc., East Hartford, CT (USA)
• DOE Contract Number: FG22-85PC80910
• OSTI ID: 5759700
• Report Number(s): DOE/PC/80910-T1; ON: DE88002728
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010600* -- Coal
Lignite
& Peat-- Properties & Composition
ALKANES
AMINES
AZINES
BROWN COAL
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHARS
CHEMICAL BONDS
CHEMICAL PREPARATION
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CHLORINE COMPOUNDS
COAL
COAL LIQUEFACTION
COAL RANK
CROSS-LINKING
DECOMPOSITION
DEPOLYMERIZATION
DOCUMENT TYPES
ENERGY SOURCES
FOSSIL FUELS
FOURIER TRANSFORMATION
FUELS
HALOGEN COMPOUNDS
HEAT TREATMENTS
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
INFRARED SPECTRA
INTEGRAL TRANSFORMATIONS
KINETICS
LIGNITE
LIQUEFACTION
MATERIALS
METHANE
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PIPERIDINES
POLYMERIZATION
POLYMERS
PROGRESS REPORT
PYRIDINE
PYRIDINES
PYROLYSIS
PYROLYSIS PRODUCTS
REACTION KINETICS
SIMULATION
SOLVENT PROPERTIES
SPECTRA
SWELLING
SYNTHESIS
TAR
THERMOCHEMICAL PROCESSES
TRANSFORMATIONS
YIELDS