Cluster characteristics of Geldart Group B particles in a pilot-scale CFB riser. I. Monodisperse systems

► Experimental cluster behavior of three monodisperse materials throughout riser. ► Riser local position is the key influence of all three cluster characteristics. ► Operating condition and material type effects are secondary. ► Cluster appearance probability is largely influenced only by riser local position. ► Duration and frequency affected by operating condition and material near riser top.