Crude, Coking


The intention of the presentation is to share a brief explanation of the Coker operation, how the antifoam is used to control foaming, and the results of a trial in North America using a Low Silicon Antifoam to reduce impact in Hydroprocessing Units & optimize costs.

We will include some information around the questions for the MOC process when the new innovative chemistry is selected and a helpful tool to control foam height at the switch vs true coke outage for reliability purposes.

A trial of the new chemistry was run in several refineries in LA and NA with good results: a reduction of 30-40% of Silicon content in Naphtha and Kero because of the antifoam injection during the Coking cycle. Refiners changed to the new chemistry; savings in the expense costs are expected as chemical usage was reduced vs previous formula with a good control of foaming.

During this presentation, we’ll cover why upstream and midstream use H2S scavengers and to a lesser extent, mercaptan scavenging chemistries. Then, we’ll delve into the different families of scavenger chemistries that can be used and the pros and cons of each, including potential impacts on downstream assets.

Moderator:
Graylon Williams, Nalco Energy Services

Topic 1. Low Silica Anti-foam in Coker Units
Speaker:
Adrian Azpilicueta, Nalco Water

Topic 2. H2S and Mercaptan Scavenger Contamination of Crude Oils
Speaker:
Rich Tereba, Baker Hughes
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