Search Results - "Carvalho, Rogerio Mesquita"
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Characterization and Quantification of Naphthenic Acids in Produced Water by Orbitrap MS and a Multivariate Approach
Published in Journal of the American Society for Mass Spectrometry (04-09-2024)“…Naphthenic acids (NAs) naturally occur in crude oil and its associated produced water, presenting significant challenges, such as corrosion, in refinery…”
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Flow Assurance Study for Waxy Crude Oils
Published in Energy & fuels (17-05-2012)“…In subsea environments, wax-phase separation, deposition, and gelling constitute an important concern in production operation/activities. Understanding the…”
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Profiling organic acids in produced water samples using vacuum-assisted sorbent extraction and gas chromatography coupled to Fourier transform Orbitrap mass spectrometry
Published in Microchemical journal (01-09-2022)“…[Display omitted] •Vacuum assisted extraction was used to extract naphthenic acids from produced water.•Microwave assisted methylation of acids was performed…”
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Automated filtering scripts based on accurate mass applied to comprehensive two-dimensional gas chromatography coupled to high resolution mass spectrometry for group-type analysis of naphthenic acids
Published in Journal of Chromatography Open (01-11-2022)“…•Automated filtering scripts reduced the time spent in GC × GC data handling.•Scripts based on accurate mass exhibited high sensitivity and specificity.•The…”
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Development of Synthetic Aqueous Oil and Grease Standards for Determination of TOG in Produced Water: Evaluation of Alternative Methods for Application in an Offshore Environment
Published in ACS omega (25-07-2023)“…Produced water is present in oil and natural gas reservoirs and is transported to the surface along with the oil. Total oil and grease content (TOG) is the…”
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Profiling naphthenic acids in produced water using hollow fiber liquid-phase microextraction combined with gas chromatography coupled to Fourier transform Orbitrap mass spectrometry
Published in Journal of Chromatography A (11-10-2021)“…•Hollow-fiber liquid microextraction to isolate naphthenic acids from produced water.•Rapid methylation of acids using microwave assistance.•Analytical…”
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Automated method using direct-immersion solid-phase microextraction and on-fiber derivatization coupled with comprehensive two-dimensional gas chromatography high-resolution mass spectrometry for profiling naphthenic acids in produced water
Published in Journal of Chromatography A (15-03-2023)“…•Solid-phase microextraction enabled reliable extraction of naphthenic acids.•On-fiber derivatization enabled full method automation.•Automated filtering…”
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Sensors for detection of production chemicals and oil in produced water
Published in TrAC, Trends in analytical chemistry (Regular ed.) (01-11-2023)“…The oil and gas industry produces millions of barrels of crude oil and a byproduct called "produced water" daily. Unfortunately, this waste product is harmful…”
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Flow Assurance Study for Waxy Crude Oils
Published in Energy & fuels (2012)Get full text
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