The feed is introduced at the
bottom of the riser and mixed with
hot, regenerated catalyst. The feed
is vapourised and the reactions take
place as the feed gas and catalyst
flow upward in the riser. At the
end of the riser, the product gas
and catalyst are separated in
cyclones, housed in the disengager.
The catalyst is then routed to the
stripper, where product gases still
entrained in the catalyst pores are
stripped with steam or nitrogen
and routed with the reactor effluent.
Stripped catalyst is then routed