According to Fig. 3, temperature was the variable that showed the greatest influence on powders moisture content. At higher inlet air temperatures, there is a greater temperature gradient between the atomized feed and the drying air, resulting in a greater driving force for water evaporation and thus producing powders with low- er moisture content. Quek et al. (2007), Rattes and Oliveira (2007) and Grabowski et al. (2006) also observed a reduction of powders moisture content with increasing air temperatures