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Inhibition of Accumulation of Crude Petroleum Storage Tank Bottom Sludge by Using Polymer Dispersants

The study was focused on evaluation of a novel approach for minimizing accumulation of tank bottom sludge during bulk storage of crude oil by using polymer dispersants. Fraction of basic sediments and water remaining in crude oil over a period of 6 months was monitored to assess the effect of additives on extent of settling. At a dose of 100 mg/L, accumulated sludge at the bottom of the container was lower by 20.5 and 22.5 times in the presence carboxymethyl cellulose and polyacrylate, respectively, than in samples without any dispersant. Further, the mechanism behind enhanced stability was investigated through viscosity, particle size, and zeta potential measurements.