In this study, the pressure drop for the binary mixtures of particles differing in size and density in a pseudo 2D spouted bed was experimentally studied. A binary mixture of solid particles including sand, Gypsum and poly urethane was used in the experimental setup. Effects of static bed height, cone angle, particles diameter and particles weight fraction on the bed pressure drop was evaluated. The relationship between the peak pressure drops of the binary mixtures to the minimum spouting velocity was discussed. The trend of variation of pressure drop versus superficial gas velocities for binary particle mixtures in the spouted beds was found to be similar with that for the single sized particle system. The particles that sink to the bed bottom are called jetsam, whereas those gathered at the upper section of the bed are called flotsam. At the same air velocity for jetsam and flotsam rich systems, the maximum pressure drop in the jetsam rich system was larger than the flotsam one. The measured values of minimum spouting velocity were compared with some empirical correlations for single sized particles in spouted beds.
