Improving fractionation lowers butane sulfur level at Saudi gas plant

Lewis G. Harruff, Gary D. Martinie, Abdul RahmanSaudi Arabian Oil Co. Dhahran Dimethyl sulfide contamination in a crude oil/natural gas stream from a gas-oil separation plant, such as the Haradh GOSP-1, led to high sulfur in a fractionation plant's butane product. Improving fractionation efficiency successfully addressed the problem. (Photograph courtesy of Aramco Services Co., Houston) Increasing the debutanizer reflux/ feed ratio to improve fractionation at an eastern Saudi Arabian NGL plant reduced high sulfur in the butane product. The sulfur resulted from dimethyl sulfide (DMS) contamination in the feed stream from an offshore crude-oil reservoir in ...

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