Coral

Many FCC units experience losses in conversion and bottoms selectivity as a result of mass transfer limitations. This is due to the resistance of high molecular weight, sterically hindered feed molecules to diffuse into a catalyst particle. Catalyst particle diffusion limitations typically result from multiple root causes. The most common causes include short contact time operations in which the oil riser residence time is less than 2-3 seconds, running heavy feedstocks, and high concentrations of contaminant metals on the equilibrium catalyst.

CORAL is specifically designed for moderate to high total equilibrium metals and for mass transfer limited operations by using the novel Catalyst Assembly Technology JADE. This technology emerged from the traditional APS technology and provides greater resistance to metal poisoning. The higher accessibility of CORAL provides substantially more capacity to absorb metals without pore blockage.

CORAL has been designed for accessibility limited operations with moderate to high metal loadings (10,000 to 20,000 ppm total metals contaminant). CORAL is recommended for the processing of very heavy vacuum gasoil and residue in units that are delta coke limited.