KDSOx 2000

Some 10% of the FCC feed sulfur end up in coke on the spent catalyst. When the coke is burned off in the regenerator, the sulfur will be liberated as mixed sulfur oxides (SOx). If no measures are taken the SOx will escape to the atmosphere.

SOx emission can be reduced to environmentally acceptable levels by means of feed hydrotreating or scrubbing of the FCC flue gas.

KDSOX 2000 is a no capital option for lowering SOx emission; it can save capital investment in case of moderate SOx emission. In case feed hydrotreating units or a scrubber are installed, KDSOx 2000 offers the refiner the possibility to overcome an outage of these units or crack cheaper higher sulfur containing feedstocks without exceeding SOx emission limits.

KDSOx is based on Albemarle’s proprietary hydrotalcite, a crystalline magnesia alumina structure and has following characteristics:

• It captures and binds SOx under regenerator conditions
• SOx is easily released under reactor/stripper conditions
• It has no adverse effect on FCC yields
• It does not increase the formation of NOx in the regenerator
• It has good unit retention and fluidization properties