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.