a) Heat transfer in a moving bed of oil shale fines Oil shale fines are a residue from moving bed pyrolysis of oil shale. One solution for using these wastes is pyrolysis in co-current MBR . In this sense, the heating of a mixture of oil shale fines and air, in a co-current moving bed is selected as case study a. Specifically, we will look at Thermal Test b) Flash calcination of kaolinite in a moving bed The flash calcination of kaolin-rich clays is an important aspect in the metakaolin production. The process is carried out in moving bed reactors or fluidized bed reactors , at temperatures between 450 °C and 750 ºC, producing only water vapor and metakaolin, according to the reaction described in Eq. ( ) .