Comparison of hygrometers for monitoring of water vapour in natural gas

Løkken, Torbjørn V.

doi:10.1016/j.jngse.2012.02.001

Cited by 22 publications

(11 citation statements)

References 12 publications

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“…Løkken reported that the frost point determined using KFCT was higher than that using CMH. 6 The results above indicate that the recovery of the water content and the error of the frost point increased with increasing water content. After the termination of titration, trace water might remain in the titration cell.…”

Section: Calibration Of Karl Fischer Coulometric Titrationmentioning

confidence: 77%

“…The first is a chilled mirror hygrometer (CMH), which is used to determine the dew point or frost point (FP) of natural gas, 3 and the second is water content analyzers or moisture analyzers, which include those based on Karl Fischer titration (KFT), capacitance-based sensors, quartz crystal microbalances (QCM), electrolytic-based sensors, and tunable diode laser absorption spectroscopy (TDLAS). [4][5][6][7][8][9][10] The frost point and water content can be converted to each other. 11 For CMH, the liquid of hydrocarbons formed at low temperature might interfere with the determination of the water dew point.…”

Section: Introductionmentioning

confidence: 99%

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Determination of Water Content of Nitrogen Containing Hydrogen Sulfide by Karl Fischer Coulometric Titration

et al. 2019

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Measuring the water content in natural gas is important for safety; however, complex matrixes make the results inaccurate. Natural gas contains hydrogen sulfide (H2S), which react with iodine (I2), causing Karl Fischer coulometric titration (KFCT) to give higher results. The KFCT method for the determination of water content of nitrogen containing H2S was investigated. A chilled mirror hygrometer offered a reference water content to calibrate the KFCT. The interfering of H2S was reduced by subtracting I2 consumed by H2S according to the reaction mechanism of ISO 10101; however, the modified results remained higher. A possible reaction mechanism with a stoichiometry of H2S to I2 of 1:2.5 was proposed. The improved KFCT method had an error of water content no more than (3 + 2%•x) mg/kg (x, water content in mg/kg) and had the potential of online monitoring of natural gas.

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Section: Calibration Of Karl Fischer Coulometric Titrationmentioning

confidence: 77%

Section: Introductionmentioning

confidence: 99%

Determination of Water Content of Nitrogen Containing Hydrogen Sulfide by Karl Fischer Coulometric Titration

et al. 2019

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“…The capacitor sensors tested in this work had already drifted for some time, during operation in previous tests (Løkken, 2012). This explains their low readings compared to the reference measurements.…”

Section: Capacitor Sensorsmentioning

confidence: 93%

“…The general importance of adequate quality control of hygrometers is pointed out by several authors (Løkken, 2012;Mermoud et al, 1989). In applications with potential for methanol exposure, e.g.…”

Section: Quality Control Of Hygrometersmentioning

confidence: 99%