How Cr compounds discolor refractory brick walls of an ethylene cracking furnace.

The article presents a case study focused on how chromium (Cr) compounds discolor refractory brick walls of an ethylene cracking furnace at a U.S. petrochemical plant. Topics discussed inludes -ray fluorescent spectrophotometer (XRF) and X-ray diffraction (XRD) analyses of the deposits and refractory, scanning electron microscopy (SEM) nalysis and volatility characterstics of chromium compounds.