DEVELOPMENT STRATEGY OF TAILORED START-UP CATALYST AND THE INDUSTRIAL APPLICATION PRACTICES IN MULTIPLE SCENARIOS

Abstract

Abstract: The lack of high-value utilization methods for catalytic cracking E-Cat has been a persistent challenge. Tailored start-up catalyst as an efficient solution, with the core principle being the scientific utilization of equilibrium catalysts from diverse sources. Based on the process characteristics of catalytic cracking units and different requirements for product distribution, while also considering the physicochemical properties (such as fluidization) of the start-up catalyst, the TSC tailored start-up catalyst was developed through the scientific blending of selected equilibrium catalyst, tailored fresh catalyst, and inert additives. This series can meet the industrial application needs of multiple scenarios, including start-up of new units, start-up after maintenance, rapid replacement after equilibrium catalyst poisoning, and replenishment during abnormal catalyst loss. Compared to traditional start-up catalyst, the tailored start-up catalyst exhibit excellent physical properties, can quickly align with the start-up requirements of the target unit, assist in rapidly achieving the desired product distribution, and enhance the overall economic efficiency of the unit. Industrial applications in units such as the 4.00 Mt/a DCC unit at Yulong Petrochemical Co., Ltd., the 2.80 Mt/a MIP unit at SINOPECYangzi Petrochemical Company, the 3.00 Mt/a RTC unit at SINOPEC Zhenhai Refining & Chemical Company and the 3.00 Mt/a RTC unit at SINOPEC Anqing Company demonstrated that the catalyst reaction activity reached a stable state quickly, contributing to a faster achievement of the designed product distribution and significantly reducing the unit adjustment time, thereby ensuring economic benefits. The development and application of tailored start-up catalyst achieve high compatibility with target units, pioneer a high-value utilization pathway for catalytic cracking equilibrium catalyst, and fully leverage the leading role of green refining technology.

Key words: catalytic cracking, tailored start-up catalyst, process characteristic, product distribution, high compatibility

References

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