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Fuel gas / Natural gas as torch oil in FCC regenerator

Fuel gas / Natural gas as torch oil in FCC regenerator

(OP)
In one of our FCCU's we have problems to close heat balance due to the processing of a very hydrotreated feedstock. We have to use torch oil (LCO or fresh feed) to maintain regenerator at its minimum temperature.

We are evaluating the possibility of using other feedstock as torch oil. Has anyone experience in using fuel gas or natural gas as torch oil in the regenerator? What major modifications in hardware are required?

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