Hydrogen sulfide is a natural component of crude oils and
may be present in significant quantities in certain crudes. H2S is expected to
remain a problem in crude oils as the market trends toward heavier crudes with
higher sulfur contents. Because of exposure risks associated with high levels
of H2S, many refineries and terminals have H2S specifications that must be met
before a crude oil is transferred into storage. In these cases, treatment with
an H2S scavenger is necessary in order to reduce H2S to within acceptable
limits. When treating crude oil for H2S, it is critical to consider the
downstream impacts of the H2S scavengers and reaction products on refinery
process equipment.
Nalco Water offers a diverse line of H2S scavengers plus the expertise and experience to help you select the best scavenger for your particular application:
- Triazine-based H2S scavengers have been successfully applied to crude oil for decades. These water-soluble additives provide fast reaction, low cost and proven reliability. Nalco Water offers several proprietary triazine formulations that contain promoters to enhance reaction speed and efficiency.
- Heavy-amine H2S scavengers are formulated to contain an amine that will not distill into the overhead of the crude tower, mitigating the risk of forming amine-chloride salts.
- Very low/non-nitrogen H2S scavengers are non-amine formulations which contain no nitrogen or very low levels of nitrogen (<1500>These products are typically recommended for nitrogen sensitive intermediates or for applications where the presence of amines is problematic.
The performance of H2S scavengers is highly dependent on application technique. Our experts will help you locate the best injection location to maximise reaction time and mixing in order to optimise programme economics.
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