Journal
ENERGY & FUELS
Volume -, Issue -, Pages 1881-1886Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.energyfuels.2c036361881Energy
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Amines are used in various processes in the oil and gas industry, but their presence can cause problems such as corrosion and nitrification. Traditional methods of amine analysis are not suitable for field deployment. We propose a new method using surface-enhanced Raman spectroscopy for accurate and quick quantification of problem-causing amines. This method is stable, calibration-free, and can be performed by minimally trained operators within 5 minutes.
Amines are used in crude oil production, natural gas recovery, and hydrocarbon refining as hydrogen sulfide scavengers, corrosion inhibitors, and pH control neutralizers. Residual amines can be detrimental to the refining process, such as forming heat-stable salts that lead to corrosioninducing deposits or causing nitrification of wastewater streams. Traditional methods for amine analysis such as ion chromatography are complex, timeconsuming, and not adapted to field deployment. We present a new method using surface-enhanced Raman spectroscopy for amine quantification with a focus on two problem-causing tramp amines: monoethanolamine and methylamine. This method is calibration-free, accurate across spectrometers, stable over years in laboratory-standard solutions and in real-world process samples, and can be performed by minimally trained operators within less than 5 min.
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