Several techniques exist for regenerating zeolite catalysts:
Oxidative Regeneration: This involves burning off the coke deposits by exposing the catalyst to an oxygen-rich environment at elevated temperatures. It is the most common method for regenerating FCC catalysts. Steam Regeneration: Steam is used to remove coke deposits. The high temperature and pressure can help restore the catalyst’s activity, though it may also cause dealumination, altering the zeolite structure. Chemical Regeneration: Specific chemicals, such as acids or solvents, are used to remove contaminants and restore the catalyst's active sites. Thermal Treatment: This method involves heating the catalyst in an inert atmosphere to remove volatile compounds and restore activity.
