Home › Forums › CatCracking › FCC Operations › RFCC with Cold Wald Design This topic contains 0 replies, has 1 voice, and was last updated by daniel 8 years, 8 months ago. Author Posts August 19, 2012 at 6:03 am #1823 danielParticipant Hi all, do you have feedback on the operational and start-up issues related to rfcc/fcc with cold wall design on the reactor and overhead line to main fractionator? how do you protect of refractory lining from damage? Appreciate your feedback. Author Posts You must be logged in to reply to this topic.