Use of dry gas, nitrogen improves FCCU reactor pressure control

11/08/1999
Having found that the traditional method of controlling reactor pressure during fluid catalytic cracking unit (FCCU) start-ups had certain disadvantages, Sinopec's Shijiazhuang refinery, located in the Hebei Province, developed a new method.The company uses high-pressure dry gas or nitrogen, instead of the traditional steam, to gain more flexibility and stability. The process also saves time and money.Reactor-pressure control is one of the most crucial process parameters during the initial stage of an FCCU start-up. The quality of this control directly influences the catalyst fluidization between the reactor and the regenerator and the catalyst loss into the slurry system.In Sinopec...
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