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Reply To: COS LPG Coker

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Evan Hyde

Determining oxygen in resid is tricky. I’m not aware of any simple tests but FTIR and neutron activation analysis have been used in labs in research papers that I have read about ashphaltene molecules.

Regarding AF, 100k cSt is middle of the road in terms of MW. You might consider 300k or 600k cSt.

Purge, 6 volumes may help but I would sample to check and determine if the direction change is effective. Come to think of it, I would sample before and after any change to measure its effectiveness.

If you make a change, please let us know on the thread if it works!

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