Pour over the can of coke and rub the window - then wipe it off with a damp cloth (to ensure the removal of any sticky residue from the sugars in the drink).
No. 1 FCCU in Jinling Petrochemical Company was revamped in 2001 to increase the processing ratio of vacuum residue. It was found later that the coke yield was increased after the revamping.
Catalytic hydro-processing is an important technology for residue oil upgrading, but the catalysts are easy to be deactivated due to the deposition of coke and metals on the catalyst surface.