Preheating process and apparatus for FCC regenerator

摘要

A preheating process is provided for a regenerator in a fluid catalytic cracking system having a reactor and a regenerator at oxidative conditions. A first gas stream containing oxygen at an inlet pressure is compressed to a pressure of at least about 10 atm to produce a compressed gas stream. A second gas stream containing a fuel source is combusted with the compressed gas stream to produce a heated gas stream. The heated gas stream is expanded to a predetermined low pressure to produce a feed gas stream. The feed gas stream is introduced into the regenerator in the fluidized catalytic cracking system.