Index correlates asphaltene stability to coker furnace fouling potential

The coking stability index (CSI) test, which determines the relative stability of coker furnace feedstocks, is more accurate than historical analytical methods that evaluate the stability of petroleum fluids.The correlation of CSI to furnace run lengths provides refiners a better predictive tool to determine the fouling potential of a petroleum fluid.We measured the CSI for three coking furnace feedstocks and found that the stability of asphaltenes in coker feedstocks has a positive correlation with furnace fouling. We established this link by studying the stability of coker feeds using a solvent titration method with a laser-based solids detection system. We used a near infrared (NIR) la...

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