Model of FCC Flue Gas Recycling Regeneration System in O2/CO2 Atmosphere
Oxygen-enriched combustion and flue gas recycling technology allows for the enrichment of CO2 in the regenerated fluid catalytic cracking(FCC)flue gas.According to the types of single-stage,parallel two-stage and overlapping two-stage regeneration systems with flue gas recycling,the regeneration system models were established respectively based on the coke burning kinetic model and sufficient coke burning settings,by which three kinds of regeneration systems were simulated.The results show that through optimizing the operation conditions such as O2 flow rate and flue gas circulation flow rate,the CO2 volume fraction of flue gas from the single-stage and overlapping two-stage regeneration system and the secondary regenerator of parallel two-stage regeneration system can be enriched to more than 95％;by contrast,the CO2 volume fraction in flue gas from the first regenerator of parallel two-stage regeneration system can not be enriched to more than 95％.The regeneration system model can help optimize the operation of regenerator,ensuring CO2 enrichment while maintaining better regeneration efficiency.
fluid catalytic cracking(FCC)O2/CO2 atmosphereflue gas recycling regenerationCO2 capturemodelingsimulation
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