Phase 1 of Task 4 was concluded this quarter with the TGA testing of Illinois No. 6 coal impregnated with calcium, iron and potassium as gasification catalysts. The TGA tests using a dry and impregnated catalyst are designed to compare reactivities using Illinois No. 6 coal. In all cases the molar equivalent ratio of catalyst to fixed carbon was 0.12, so that for K{sup } the molar ratio was K/FC = 0.12, for Ca{sup } = 0.06, and for Fe{sup } = 0.04 mols/mol. In this way the active sites on the coal structure ({minus}COO{sup {minus}}) are exposed to the same number of possible connections with mobile cations regardless of the choice of metallic element. The TGA tests used both a dry and impregnated form of each catalyst at temperatures ranging from 700{degree} to 800{degree}C. The overall reactivities obtained in from the TGA data, shown in Figure 1 and listed in Table 1, reveal that taconite alone, dry or impregnated, provides essentially no catalytic activity. Impregnated calcium provides some improvement in reactivity as compared with.dry limestone and taconite however this improvement is insignificant in comparison to the high reactivities obtained with a potassium catalyst (dry or impregnated). As stated last quarter, the negligible difference in reactivities of wood ash leachate and K{sub 2}CO{sub 3} indicate that the potassium is as mobile dry as it is impregnated and therefore its chemical form is not a crucial issue. These results will be used to modify the second phase of the experimental studies test plan.