(Acid base properties of coals and other solids: Quarterly no. 4, 09/01/86-11/30/86)
A variety of thermodynamic techniques have been used in this laboratory to compare the overall interactions of a variety of bases with several types of coals and solid acids, including sulfonic acid resins, silica gel, carbonaceous solids, such as graphite and Ambersorb. Specifically, it has been demonstrated that Dowex 50-W resin is a good model for heterogeneous Broensted acidity and that silica gel is a good model for hydrogen-bonding acidity. Various coals: Wyoming Rawhide, Illinois number6, Texas Lignite and Anthracite differentiated by our thermochemical method are classified by multiparameter expressions using Dowex, silica and graphite as model solids. This investigation of solid acidity has progressed to the point where a study of solid Lewis acidity seems appropriate. Alumina has been chosen for evaluation as a model Lewis acid solid. Presented in this report are results from a thermodynamic study of aluminum hydroxide; commonly referred to as alumina. Two aluminas, delta-theta and kappa, were used to perform heat of immersion studies. Also described are initial results from a flow calorimetric-ultraviolet spectroscopic study of aluminas; this technique allows one to determine the amount of adsorbent which contributes to the heat of adsorption so that results can be expressed in kcal/mol. 10 refs., 4 figs., 2 tabs.
- Research Organization:
- Duke Univ., Durham, NC (USA)
- DOE Contract Number:
- FG22-85PC80521
- OSTI ID:
- 7006125
- Report Number(s):
- DOE/PC/80521-T5; ON: DE87002679
- Resource Relation:
- Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Thermodynamic and spectroscopic investigations of aluminas and thermodynamic studies of other solid systems
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ALUMINIUM HYDROXIDES
ADSORPTION HEAT
WETTING HEAT
DECANE
DMSO
EXPERIMENTAL DATA
HEXANE
PHASE TRANSFORMATIONS
PYRIDINE
TEMPERATURE EFFECTS
TETRAHYDROFURAN
THERMODYNAMIC PROPERTIES
WATER
ALKANES
ALUMINIUM COMPOUNDS
AZINES
DATA
ENTHALPY
FURANS
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROXIDES
INFORMATION
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PYRIDINES
SULFOXIDES
400201* - Chemical & Physicochemical Properties