Characterization of high temperature vapors of import to combustion and gasification processes in the energy technologies. Final report, March 1, 1980-March 1, 1981
Low tolerance levels for certain species in process streams impose stronger requirements for reliable thermodynamic and kinetic data in order to predict low level species concentrations. In addition, there must be serious concern focused on whether or not these systems are best represented via equilibrium or non-equilibrium models. We have been concerned with the characterization of important processes in these inherently high temperature systems through application of chemiluminescent and laser fluorescent techniques to the determination of bond energies, spectroscopic constants, and rapid energy transfer processes. Our focus has been on the monohydroxides of sodium and potassium and the oxides and sulfides of select metals including SiO, SiS, Na/sub 2/O, and NaO. We have investigated the non-equilibrium routes for the formation of these compounds and have carried out some kinetic parameterization. In addition, we have been engaged in the study of rapid energy transfer routes among the electronic states of high temperature molecules. Thus far these studies have indicated that both V-E and E-E energy transfer can occur at rates which may approach 500 times the calculated gas kinetic rate. These surprising results demonstrate that vibrationally and/or electronically excited high temperature molecules act as if they were large and diffuse entities capable of significant interaction at very long range. The rapid energy transfer is a general phenomenon and effects have been observed in several molecules including SiO and KOH. The observation of such rapid energy transfer has significant implications for the modeling of energy generating systems and the characterization of heat flow in these systems. The nature of the rapid energy transfer means that both kinetic reaction rate data and energy transfer data must be included in order to obtain a realistic modeling of an energy generating system.
- Research Organization:
- Georgia Inst. of Tech., Atlanta (USA). School of Chemistry
- DOE Contract Number:
- AC21-80MC14615
- OSTI ID:
- 6232578
- Report Number(s):
- DOE/MC/14615-T1; ON: DE85005275
- Resource Relation:
- Other Information: Portions are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
POTASSIUM HYDROXIDES
BINDING ENERGY
EXCITED STATES
SYNTHESIS
POTASSIUM OXIDES
SILICON OXIDES
SILICON SULFIDES
SODIUM HYDROXIDES
SODIUM OXIDES
CHEMILUMINESCENCE
COAL
COAL GASIFICATION
COMBUSTION
ENERGY TRANSFER
FLUORESCENCE
LASER SPECTROSCOPY
RESEARCH PROGRAMS
ALKALI METAL COMPOUNDS
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHEMICAL REACTIONS
ENERGY
ENERGY LEVELS
ENERGY SOURCES
FOSSIL FUELS
FUELS
GASIFICATION
HYDROGEN COMPOUNDS
HYDROXIDES
LUMINESCENCE
MATERIALS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POTASSIUM COMPOUNDS
SILICON COMPOUNDS
SODIUM COMPOUNDS
SPECTROSCOPY
SULFIDES
SULFUR COMPOUNDS
THERMOCHEMICAL PROCESSES
010404* - Coal
Lignite
& Peat- Gasification
014000 - Coal
Lignite
& Peat- Combustion
400201 - Chemical & Physicochemical Properties