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Effects of the water content on the performance of H<inf>2</inf>S scavengers

Abstract:

Scavengers are technological options used to reduce the H2S levels in natural gas, when the stream to be treated is < 100 million cu ft/day with H2S concentration up to 100 ppm. Laboratory and fields test were conducted to determine the reaction capabilities of such chemical treatments at the conditions of northern Venezuela gas streams. Different H2S liquid scavengers were tested in the 414 kPa Muri-Muscar gas pipeline that transports 235,030 cu m/day, with an average concentration of CO2 and H2S of 8% and 40 ppm, respectively. Different H2O/H2S ratios were used to establish the effect of liquid water on the solid and liquid H2S scavengers performance. A ratio of H2O/H2S 0.024:1 (g/g) did not affect the absorption capability of the liquid H2S scavenger. Medium water content corresponded to the water condensed from the natural gas due to drop pressure and/or a temperature reduction.