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New Delayed Coker Antifoam Reduced Silicon Carryover

Baker Hughes solved refinery operating problems

A West Coast US refinery using 600,000 cSt antifoam in their delayed coker was experiencing higher than desired silicon carryover in the streams exiting the main fractionator. Base case coker liquid product samples collected at identical periods in the drum cycle showed silicon levels of 20.0 ppm, 4.5 ppm and 2.5 ppm in coker naphtha, LCGO, and HCGO, respectively. This silicon carryover was having a negative impact on catalyst life in downstream hydrotreaters.

Baker Hughes representatives collaborated with the refinery staff to review the system and then present recommendations. After a joint analysis by both parties, it was agreed that a newly developed product, Baker Petrolite FOAMSTOP™ 5000 low catalyst impact (LCI) antifoam, would be evaluated. Additional sets of naphtha, LCGO, and HCGO samples were collected to monitor silicon levels, using the same sampling protocol developed to generate the baseline data.

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