Role of preasphaltenes in coal conversion reactions. Second quarterly report, year two
The plans for the second year in the present contract called for application of analytical methods developed in the first year to the elucidation of the role of preasphaltenes in the coal conversion processes. As introduced and discussed in the last quarterly report, recent experiments have demonstrated the necessity of also studying the influence of weathering processes on coal structures and reactivity especially in regard to the production of preasphaltene-rich, short contact time (SCT) pyrolyzates. In this report we review and further develop some of the results presented in the last quarterly report as well as new information obtained in the second quarter. These results and their implications to initial coal structure and the role of preasphaltenes are discussed in respect to the following four tasks: (1) Study of the effects of laboratory weathering on the Free Swelling Index (FSI), sample weight, calorific value and ASTM proximate analysis on hvb Hiawatha coal. (2) Thermogravimetry (TG) and Derivative Thermogravimetry (DTG) of fresh and weathered hvb coal samples. (3) Pyrolysis mass spectrometry (Py-MS) analysis of fresh and weathered hvb coal samples and detailed examination of weathering effects. (4) Py-MS comparison of vacuum and pyridine extracts and SCT tubing bomb reactor products from fresh and weathered coals. 7 references, 11 figures, 2 tables.
- Research Organization:
- Utah Univ., Salt Lake City (USA). Biomaterials Profiling Center
- DOE Contract Number:
- FG22-82PC50790
- OSTI ID:
- 6889533
- Report Number(s):
- DOE/PC/50790-T5; ON: DE84011432
- Resource Relation:
- Other Information: Portions are illegible in microfiche products. Original copy available until stock is exhausted
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COAL
CALORIFIC VALUE
CHEMICAL COMPOSITION
PYROLYSIS
SWELLING
WEATHERING
COAL EXTRACTS
STRUCTURAL CHEMICAL ANALYSIS
COAL TAR
PYRIDINE
SOLVENT PROPERTIES
ASPHALTENES
DIFFERENTIAL THERMAL ANALYSIS
DISTILLATES
EXPERIMENTAL DATA
MASS SPECTRA
MASS SPECTROSCOPY
RESEARCH PROGRAMS
SOLVENT EXTRACTION
THERMAL GRAVIMETRIC ANALYSIS
TIME DEPENDENCE
ASPHALTS
AZINES
BITUMENS
CARBONACEOUS MATERIALS
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
COMBUSTION PROPERTIES
DATA
DECOMPOSITION
ENERGY SOURCES
EXTRACTION
FOSSIL FUELS
FUELS
GRAVIMETRIC ANALYSIS
HETEROCYCLIC COMPOUNDS
INFORMATION
MATERIALS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OTHER ORGANIC COMPOUNDS
PYRIDINES
QUANTITATIVE CHEMICAL ANALYSIS
SEPARATION PROCESSES
SPECTRA
SPECTROSCOPY
TAR
THERMAL ANALYSIS
THERMOCHEMICAL PROCESSES
010600* - Coal
Lignite
& Peat- Properties & Composition