This Quarterly Report presents an overview of all the research conducted to date. The purpose of this research, which commenced October 1, 1984, is to determine the effects of programmed process temperature profiles and coal/additive mixtures on the alkali and trace metal content of both supermicron fly ash particulate matter and submicron aerosols formed during the high temperature entrained flow gasification and combustion of pulverized coal. The research is based on the idea that control of temperature and temperature quench rate can favorably influence the fraction of volatile trace and alkali metals condensing on larger fly ash particles, and the additional surface area and surface properties provided by additives such as powdered kaolinite or powdered limestone might enhance this process further. Theory indicates that nucleation mechanisms, which form tiny submicron particles which are difficult to collect, might be inhibited by decreasing the temperature quench rate below 600 K/S. The problem is to be attacked experimentally in a 2 to 4 kg/h down fired, ''premixed'', plane flame reactor, specially modified to allow in-situ trapping and classifying of large fly ash particles. Gaseous species and submicron particles will be measured using established techniques of extraction sampling and appropriate analyzers. Segregated size functions of super- and sub-micron particles will be chemically analyzed using atomic absorption, SEM x-ray fluorescence and Scanning Auger Microscopy. 35 refs., 5 figs.