A counter-current catalyst regenerator with at least two stages of counter-current contact along with a regenerator riser is proposed. Each stage may comprise a permeable barrier that allows upward passage of oxygen-containing gas and downward passage of coked catalyst into each stage, but inhibits upward movement of catalyst to mitigate back mixing and approximate true counter-current contact and efficient combustion of coke from catalyst. The regenerator riser may provide a passage to transport the catalyst and may serve as a secondary stage for coke combustion to provide the regenerated catalyst.

Present invention relates to a novel process for upgrading a residual hydrocarbon oil feedstock having a significant amount of Conradson Carbon Residue (concarbon), metals, especially vanadium and nickel, asphaltenes, sulfur impurities and nitrogen to a lighter more valuable hydrocarbon products by reducing or minimizing coke formation and by injecting fine droplets of oil soluble organo-metallic compounds at multiple elevations of the riser with varying dosing rates.

Present invention relates to a novel process for upgrading a residual hydrocarbon oil feedstock having a significant amount of Conradson Carbon Residue (concarbon), metals, especially vanadium and nickel, asphaltenes, sulfur impurities and nitrogen to a lighter more valuable hydrocarbon products by reducing or minimizing coke formation and by injecting fine droplets of oil soluble organo-metallic compounds at multiple elevations of the riser with varying dosing rates.

A catalyst regeneration method is suitable for use in a fluidized catalytic cracking unit that includes a catalytic cracking reactor and a catalyst regenerator. The regeneration method includes the steps of: 1) providing a bio-based liquid phase fuel; 2) introducing the bio-based liquid phase fuel into a catalyst regenerator or a stripping section of the catalytic cracking reactor; 3) introducing an oxygen-containing gas into the catalyst regenerator; and 4) sending the spent catalyst from the catalytic cracking reactor to the catalyst regenerator, where the spent catalyst is contacted with the bio-based liquid phase fuel or the residue thereof and oxygen-containing gas to carry out coke burning regeneration. This method can greatly reduce the carbon emission of the catalytic cracking unit and can also provide energy for other process units and also converts part of the bio-based liquid phase fuel into chemicals.

A catalyst regeneration method is suitable for use in a fluidized catalytic cracking unit that includes a catalytic cracking reactor and a catalyst regenerator. The regeneration method includes the steps of: 1) providing a bio-based liquid phase fuel; 2) introducing the bio-based liquid phase fuel into a catalyst regenerator or a stripping section of the catalytic cracking reactor; 3) introducing an oxygen-containing gas into the catalyst regenerator; and 4) sending the spent catalyst from the catalytic cracking reactor to the catalyst regenerator, where the spent catalyst is contacted with the bio-based liquid phase fuel or the residue thereof and oxygen-containing gas to carry out coke burning regeneration. This method can greatly reduce the carbon emission of the catalytic cracking unit and can also provide energy for other process units and also converts part of the bio-based liquid phase fuel into chemicals.

A catalyst regeneration method is suitable for a fluidized catalytic cracking unit has a catalytic cracking reactor and a catalyst regenerator. The regeneration method has the following steps: 1) providing a biomass-derived biomass charcoal; 2) feeding the biomass charcoal and the catalyst to be regenerated from the catalytic cracking reactor into the catalyst regenerator together or separately; 3) introducing an oxygen-containing gas into the catalyst regenerator, wherein the oxygen content of the oxygen-containing gas is 14-28% by volume; and 4) contacting the catalyst to be regenerated with the biomass charcoal and oxygen-containing gas in the catalyst regenerator for coke-burning regeneration. The method can significantly reduce carbon emissions from the catalytic cracking unit, realize the recycling of carbon elements, and provide energy for other process units.