Basic properties of coals and other solids
This quarter, Dr. Ahsan has become skilled in handling the Seteram C-80 calorimeter and has used it to study heats of immersion of polyvinylpyridine and silica in a series of acids. He has also extended, and for the time being completed, our comparison of heats of interaction of polyvinylpyridine slurries and pyridine solutions with a series of sulfonic and carboxylic acids. These studies demonstrate the expected direct proportionality between the response of homogeneous and heterogeneous base systems towards proton transfer from Broensted acids. The interactions of silica with the series of acids is quite surprising, and to our knowledge unprecedented. It appears to demonstrate a remarkable ability of silica to act as a hydrogen-bond donor even to systems which are so acidic that they would be expected to protonate the hydroxyl groups on the silica surface. At present we have on hand premium samples of Wyodak, Illinois {number sign}6 and Pittsburgh {number sign}8 Coals from the Argonne National Coal Bank. In addition we have from Exxon three coal-derived asphaltenes obtained from a single Rawhide subbituminous coal which can be compared with the original Rawhide coal by their heats of interaction with a series of carefully chosen acids and bases. 1 fig., 3 tabs.
- Research Organization:
- Duke Univ., Durham, NC (USA). Dept. of Chemistry
- Sponsoring Organization:
- DOE/FE
- DOE Contract Number:
- FG22-89PC89780
- OSTI ID:
- 7089657
- Report Number(s):
- DOE/PC/89780-T3; ON: DE90012520
- Country of Publication:
- United States
- Language:
- English
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Basic properties of coals and other solids
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Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
BROENSTED ACIDS
CHEMICAL REACTIONS
COAL
SILICA
CORRELATIONS
PROGRESS REPORT
PYRIDINE
PYRIDINES
THERMODYNAMICS
AZINES
CARBONACEOUS MATERIALS
CHALCOGENIDES
DOCUMENT TYPES
ENERGY SOURCES
FOSSIL FUELS
FUELS
HETEROCYCLIC COMPOUNDS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
MATERIALS
MINERALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
SILICON COMPOUNDS
SILICON OXIDES
010600* - Coal
Lignite
& Peat- Properties & Composition
400201 - Chemical & Physicochemical Properties