Characterization of High-Temperature Vapor-Phase Species and Vapor-Solid Interactions of Import to Combustion and Gasification Processes in the Energy Technologies. Quarterly Technical Progress Report No. 7, 14 April-15 July 1983

摘要

This report summarizes work completed during the seventh quarter of a two-year study focused primarily on the determination of bond energies and spectra for the alkali hydroxides and oxides, the study of pronounced particulate matter formed in alkali oxidation, and the characterization of sodium cluster and sodium surface oxidation with various oxidants. We have developed and are continuing to improve experimental configurations for generating intense, stable, and long-lasting chemiluminescent emission from the alkali hydroxides NaOH and KOH and the alkali oxides NaO and KO. The first electronic emission spectra for these compounds have been generated and are being studied in our laboratory. Commensurate with this effort has been the study of extensive particulate formation which appears to be pathological to the alkali hydroxide and oxide systems. This particulate matter, formed in an extremely efficient manner in the oxidation process, has been studied using a number of techniques (low temperature mass spectrometry, EPR spectrometry, and Raman spectroscopy). Initial efforts to obtain an x-ray powder pattern and a high temperature quadrupole mass spectrum have been instituted. Sodium cluster oxidation studies over the past three month period have focused on the desire to observe emission from highly exothermic processes which characterize the Na/sub x/-SO sub 2 -Cl sub 2 system. In addition, refinements of studies of silicon monoxide formation which complement previous studies under DOE sponsorship were carried out during this period. From these studies the bond energy of SiO was confirmed from a purely spectroscopic measurement thus complementing and confirming the mass spectrometric determinations. 3 figures. (ERA citation 08:056819)