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From: charlierandall@sprynet.com
Category: Safety
Date: 28 Dec 2004
The ExxonMobil website has lots info in their technology section since they are ones that hold patent on it. Like atctnc cat said google will turn up lot their pdf's - and if it doesn't give me email & I will send some to you. Let me know what your after & I'll pick one with most info. (most recent were XOM at fuels conference & Prauge tech conference in EU. XOM also puts out fall/Summer PQT tech review pdf with articles on process. All cokers operate as carbon rejection units.
Basically the delayed cokers (needle, fuel, sponge/anode) are all batch coking process while Fluid & Flexicokers are continuous process. Fluid & Flexicokers use re-circulated coke particles as catalyst / nucleation site for fluid coke formation and more of the coke is consumed in process to supply heat - almost completely in case flexicoker which is sort of an integration of fluid coker & gasification unit.
There have been 18 fluid & flexicokers put in, 14 are still operating - 5 are Flexicokers & 7 are refinery fluid cokers & 2 are upgrader fluid cokers (3rd one has been added now @ Syncrude). ExxonMobil has Flexicoker at Baytown, Rotterdam & Lugi hybrid type at Ingolstadt that was shutdown (Apr04). ExxonMobil has Fluid cokers at Sarnia & Billings. The ones I know of shutdown were at Purvis ,Bakersfield & Detroit (MAP?) refineries. There may be one shutdown in Montreal? (and there was flexicoker pilot plant at Baytown shutdown in 1976).
Regards Charlie Randall