Monitoring the degradation and the corrosion of naphthenic acids by electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry and atomic force microscopy

Dias, Heloísa P.; Pereira, Thieres M.C.; Vanini, Gabriela; Dixini, Pedro Vitor Morbach; Celante, V.G.; Castro, Eustáquio Vinícius Ribeiro de; Vaz, Boniek G.; Fleming, Felipe P.; Gomes, Alexandre O.; Aquije, Glória M. F. V.; Romão, Wanderson

doi:10.1016/j.fuel.2014.02.031

Cited by 41 publications

(22 citation statements)

References 33 publications

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“…In ESI(−) (Fig. a–f) occurs deprotonation of the analyte ([M − H] − ions), and chemical species such as acids and sugars are easily ionized …”

Section: Resultsmentioning

confidence: 99%

“…1a-f ) occurs deprotonation of the analyte ([M − H] − ions), and chemical species such as acids and sugars are easily ionized. 34 Figure 1a-f shows the ESI(−)FT-ICR mass spectra for pineapple samples as a function of the maturation stage (0-5). The high content of sugars in samples, confirmed by physico-chemical tests, can also be observed by the intense signals generated by the presence of deprotonated disaccharides such as [C 12 O 18 − H] − ion of m/z 533.…”

Section: Esi(−)ft-icr Ms and Esi(−)ms/msmentioning

confidence: 99%

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Chemical profile of pineapple cv. Vitória in different maturation stages using electrospray ionization mass spectrometry

et al. 2017

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“…In ESI(−) (Fig. a–f) occurs deprotonation of the analyte ([M − H] − ions), and chemical species such as acids and sugars are easily ionized …”

Section: Resultsmentioning

confidence: 99%

Section: Esi(−)ft-icr Ms and Esi(−)ms/msmentioning

confidence: 99%

Chemical profile of pineapple cv. Vitória in different maturation stages using electrospray ionization mass spectrometry

et al. 2017

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“…The corrosion rate proportionally increased as a function of the molar weight of the naphthenic acid, reaching a maximum value in the presence of acid species with a carbon number equal to 9, i.e., C 9 , and then the corrosion rate decreased. In 2014, Dias et al 15 used atomic force microscopy (AFM) and scanning electron microscopy (SEM) to monitor the thermal degradation of NAs present in two crude oils and their corrosion effects on AISI 1020 steel. Two acidic crude oils samples (TAN = 2.38 and 4.79 mg KOH g -1 , and total sulfur = 0.7993 and 1.0220 wt.%) were submitted to thermal treatment at 280, 300 and 350 °C during 2, 4 and 6 h. AFM topographic profile evidenced that the naphthenic acid corrosion of the crude oil with TAN of 4.73 mg KOH g -1 on AISI 1020 steel was profoundly altered, having a marked reduction in peak-to-peak height values (obtained by subtracting the value of the lowest peak by the highest peak in the topographic area examined).…”

Section: Introductionmentioning

confidence: 99%

Study of the Corrosive Behavior of the AISI 1020 Steel in Acid Crude Oil by Microscopic Techniques (LM, AFM and SEM/EDX) and Raman Spectroscopy

Dias¹,

Barros²,

Sad³

et al. 2018

J. Braz. Chem. Soc.

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Microscopic techniques were combined to study the influence of corrosion rate on the morphologic behavior of AISI 1020 steel specimens submitted to thermal degradation of a typical acid crude oil (total acid number (TAN) = 2.1390 mg KOH g -1 and total sulfur (S) = 0.7778 wt.%). The techniques used were light microscopy (LM), scanning electron microscopy/energy dispersive spectroscopy (SEM/EDX), atomic force microscopy (AFM) as well as Raman spectroscopy. Assays were performed in six different degradation time (t = 6, 12, 24, 36, 48 and 72 h) at 320 °C. After the exposure of the specimens to petroleum, a reduction above 37% in the TAN after t = 72 h was observed, with a maximum corrosion rate during the first periods of degradation (t = 6 and 12 h). Correlating the TAN and corrosion rate data with the microscopic data, the images of LM, AFM, and SEM/EDX showed that after 6 h of exposure to petroleum, a passivation film was formed on the surface of the steel. This film consisted of two layers, an external one, formed of FeS, and an internal one, composed of iron oxides and oxyhydroxides. However, after 48 h of thermal degradation, this morphology was altered to a single layer of FeS coating the steel surface.

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“…The aromaticity of a petroleum component can be directly deduced from its DBE value according to Eq. (1)[42,43]:…”

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confidence: 99%

Laser desorption ionization FT-ICR mass spectrometry and CARSPLS for predicting basic nitrogen and aromatics contents in crude oils

Terra

Filgueiras

Tose

et al. 2015

Fuel

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Monitoring the degradation and the corrosion of naphthenic acids by electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry and atomic force microscopy

Cited by 41 publications

References 33 publications

Chemical profile of pineapple cv. Vitória in different maturation stages using electrospray ionization mass spectrometry

Chemical profile of pineapple cv. Vitória in different maturation stages using electrospray ionization mass spectrometry

Study of the Corrosive Behavior of the AISI 1020 Steel in Acid Crude Oil by Microscopic Techniques (LM, AFM and SEM/EDX) and Raman Spectroscopy

Laser desorption ionization FT-ICR mass spectrometry and CARSPLS for predicting basic nitrogen and aromatics contents in crude oils

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