PetroFCC

The PetroFCC process employs several measures to improve the yield and selectivity of propylene and lower the 5deld of dry gas  

The expected yield patterns for a typical VGO feedstock in a traditional FCC unit and a PetroFCC unit are compared in Table 14. 

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The PetroFCC process changes an FCC unit from a gasoline-producing device to a source of petrochemical feedstocks. It can provide both aromatic naphtha to an aromatics complex and light olefins to a polyolefins complex. Feedstock utilization can be further improved by recycling the raffinate by-product from BTX solvent extraction back to the PetroFCC reactor for conversion to light olefins. 

Houdek J.M., Hemler C.L., Upson L.L and Pittman R.M..PetroFCC - New Paradigm (European Refining Technology Conference, Rome, 2000). 

PetroFCC [Petrochemicals Fluid Catalytic Cracking] A modified FCC process that increases the yields of propylene and butene for use in petrochemical manufacture. The modifications are mainly to the engineering and involve a dual reaction zone with a single regenerator. One feature is RxCat technology, which involves mixing some of the spent catalyst with regenerated catalyst in a separate chamber. Developed by UOP in 2000 and licensed for use in the Philippines in 2008. 

The PetroFCC catalyst has two components. The first component comprises a large pore zeolite, such as a Y-type zeolite. The second component involves mediiun or small pore zeolites such as ZSM-5 or ST-5, which have high coking resistance. 

Table 14. Yield patterns of traditional FCC and PetroFCC units...

HOCC [High-Olefin Catalytic Cracking] A general name for such processes, including CPP, DCC, and PetroFCC. 

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