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Title: DETERMINATION OF H2S & TOTAL SULFUR IN NATURAL GAS
Author: Byron Larson
Source: 2022 Appalachian Gas Measurement Short Course
Year Published: 2022
Abstract: In the natural gas industry, H 2 S and total sulfur are moni- tored to validate tariff limits or to ensure process specifica- tions are maintained at receipt, sales, and process con- trol points throughout the system. Typical measurement ranges are 0-20 ppm for H2S and 0-100 ppm for total sul- fur on transmission lines. Wellhead treating, particularly shale gas development has created the need to measure higher ranges of 1000 to 5000 ppm measurement at H 2S treater skid inlet with a target treater outlet of 1 to 5 ppm. Downstream processing plant inlet applications require percentage measurement of 1-10% and sulfur plant feed or H2S re-injection ranges of 20-60%. Natural Gas gath- ering systems may blend off-spec gas with spec gas to maintain gas quality specifications in the 0-5% H 2 S range. Liquid rich shale gas presents a need to measure H2S in condensate or light oil streams. Natural gas streams used as feed stock in fertilizer production or any other sulfur sensitive catalyst bed dependent process requires sub ppm to as low as 10 ppb sulfur measurement. This paper summarizes principles of operation and points to consider when employing available technologies for vari- ous applications and concentrations encountered in the gas industry and related downstream facilities.

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