Reaction calorimetry for coal chemistry and catalysis. Final report, August 1, 1982-July 30, 1985. [Heats of immersion]
All of the areas of research proposed for study in our 1982 proposal have been attacked, but with differing degrees of intensity and success. (1) The most intensive and successful study has been a thermochemical comparison of heats of reaction of a series of nitrogen bases with p-toluene-sulfonic acid solutions (mostly in acetonitrile) and solid Dowex sulfonic acid resin in the same solvent. An excellent linear correlation between these homogeneous and hetrogeneous acids bearing the same acidic function proves the capability of the thermochemical approach to relating the acidity of solid Broensted acids to well-established scales of acidity for solutions. (2) Several samples of silica gels have been examined as prototype hydrogen-bonding acids and are presently under intense study as models for solid acids which react through hydrogen bonds. (3) A flow adsorption calorimeter system capable of operating from ambient conditions to 300/sup 0/C and 5500 psi has been built and used to study the interaction of silica gel with isopropylamine in isopentane solution from ambient conditions through the supercritical regime to 250/sup 0/C and 1500 psi. This is (to the best of our knowledge) the first such study and opens a wide range of research of importance to fossil fuel chemistry. (4) Heats of immersion of three types of coal have been measured in many of the same liquid bases to study Dowex resin, as a prototype solid Broensted acid, and silica gel as a prototype hydrogen bonding acid. These solids and several others were compared in terms of their thermochemical acidities by means of a multiparameter correlation equation which is shown as a promising approach to classifying the various of acid-base interactions of solids. 33 refs., 14 figs., 7 tabs.
- Research Organization:
- Duke Univ., Durham, NC (USA). Dept. of Chemistry
- DOE Contract Number:
- FG22-82PC50807
- OSTI ID:
- 5474591
- Report Number(s):
- DOE/PC/50807-12; ON: DE85015816
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Reaction calorimetry for coal chemistry and catalysis. Annual report, August 1, 1983-July 30, 1984. [Heats of immersion]
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Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
AMINES
ADSORPTION HEAT
BITUMINOUS COAL
THERMODYNAMIC PROPERTIES
BROWN COAL
GRAPHITE
PYRIDINES
REACTION HEAT
SILICA
SURFACE AREA
SILICA GEL
SUBBITUMINOUS COAL
SULFONIC ACIDS
CALORIMETRY
EXPERIMENTAL DATA
MEDIUM TEMPERATURE
RESEARCH PROGRAMS
TEMPERATURE DEPENDENCE
ADSORBENTS
AZINES
BLACK COAL
CARBON
CARBONACEOUS MATERIALS
CHALCOGENIDES
COAL
DATA
ELEMENTAL MINERALS
ELEMENTS
ENERGY SOURCES
ENTHALPY
FOSSIL FUELS
FUELS
HETEROCYCLIC COMPOUNDS
INFORMATION
MATERIALS
MINERALS
NONMETALS
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SILICON COMPOUNDS
SILICON OXIDES
SURFACE PROPERTIES
010600* - Coal
Lignite
& Peat- Properties & Composition
400301 - Organic Chemistry- Chemical & Physicochemical Properties- (-1987)