SURFACE TEXTURE OF HIGH-AREA MANGANESE OXIDE POWDERS VERSUS COMPACTION

Three prepared manganese oxide powders from K+-contaminated NH4MnO4, o f high surface area (43-340 m(2) g(-1)) were investigated for the asse ssment of the textural consequences of compaction. The powders were co mpacted in die at various pressures (1-15 ton in(-2)) encompassing tec hnological conditions. Textural modifications were estimated by applyi ng the f-plots. Results indicated that compaction effects vary dependi ng on the initial physicochemical characteristics of the powder. For i ndustrial applications of pelleted catalysts, it is advisable to choos e the appropriate compaction pressure to give optimal textural charact eristics.