November 2015

Environment and Safety

Case study: Refinery mercury chemical decontamination in preparation for decommissioning

Initial mercury management strategies began in 2010 at a US refinery processing approximately 200 Mbpd of North Slope crude oil.

Radford, R., Portnoy Environmental Inc.

Initial mercury management strategies began in 2010 at a US refinery processing approximately 200 Mbpd of North Slope crude oil. During maintenance and inspection activities in 2010, elemental mercury was observed in hydrocarbon processing vessels throughout the solvent extraction unit (SEU) (Fig. 1), with interior vessel mercury vapor concentrations greater than 500 micrograms per cubic meter (µg/m3).     Fig. 1. Elemental mercury was observed   in hydrocarbon processing vessels   throughout the solvent extraction unit. Based on this observation, studies were conducted to assess the distribution and accumulation of mercury in primary process units that were previously s

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