Study of the Effect of Inhibitors Solutions on the Chemical Composition of Waxes by Rheology Tests and High Resolution Mass Spectrometry

Souza, Lindamara M.; Silva, Samantha R.C.; Filgueiras, Paulo R.; Santos, Francine D.; Vasconcelos, Géssica A.; Lacerda, Valdemar; Vaz, Boniek G.; Romão, Wanderson

doi:10.21577/0103-5053.20190221

Cited by 4 publications

(5 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The FT-ICR MS analyses were performed by a SolariX 9.4T FT-ICR mass spectrometer − (Bruker, Bremen, Germany) equipped with an ICR cell as the infinity cell.…”

Section: Methodsmentioning

confidence: 99%

“…The maximum acceptable accuracy was 3 ppm. The Composer and Compass Data Analysis presents information about the heteroatom classes present in the samples, DBE information, and charts relating carbon number and DBE values. − The DBE is calculated from eq . − where C represents the number of carbons, H the number of hydrogens, N the number of nitrogens in the molecular formula.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Study of Thermal Aging of Model Compounds Present in Asphalt Cement by GC/MS, ESI-MS, NMR, and FTIR

et al. 2021

Self Cite

View full text Add to dashboard Cite

The study of petroleum asphalt cement (AC) aging is essential for the production of good quality pavements with high durability. Because of the complexity of this material, one of the biggest challenges is understanding the chemical variations that occur in the molecules present in the AC during the aging processes. This work proposes to study 15 standards of model compounds present in the AC composition, representing the fractions of saturated compounds (5-α-cholestane and hexatriacontane), aromatics (hexamethylbenzene, coronene, and benzo-[a]anthracene), nitrogenous compounds (acridine, carbazole, indole, and N,N′-Bis(3-pentyl)perylene-3,4,9,10-bis-(dicarboximide)), sulfur compounds (2-naphthalenethiol, 4,6diethyldibenzothiophene, and naphtho[1,2-b:6,5-b′]dithiophene(NDT)), and naphthenic acids (stearic (SA), pentadecanoic (PA), and sinapinic acids (ASN)), which were thermally aged by two methods: (i) they were subjected to a constant temperature of 80 °C, varying the time of analysis over 5, 10, 15, 30, and 60 days; and (ii) temperatures ranging from 80, 100, 120, to 140 °C for 15 days. The analyses of these compounds were performed by GC/MS, 1 H and 13 C NMR, ESI(−)MS (FT-ICR and LTQ), and FTIR. The results obtained showed that at 80 °C, from 15 days, only the indole standard compound showed the presence of thermal products, i.e., compounds detected from thermal aging of the standard model compounds. When the degradation temperature was increased from 100 to 140 °C, we observed the formation of thermal products at 100 °C in 6 out of 15 model compounds. However, at 140 °C, 12 of the 15 model compounds presented some type of degradation. Reactions of oxidation, polymerization, thermal aging, volatilization, and formation of double bonds were observed.

show abstract

“…The FT-ICR MS analyses were performed by a SolariX 9.4T FT-ICR mass spectrometer − (Bruker, Bremen, Germany) equipped with an ICR cell as the infinity cell.…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Study of Thermal Aging of Model Compounds Present in Asphalt Cement by GC/MS, ESI-MS, NMR, and FTIR

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…Romão et al used four Brazilian crude oils (P1-P4) and five inhibitor solutions (I1-I5), combined with rheological results, to understand the characteristics of saturated fractions at the molecular level by HRMS (Orbitrap-coupled APCI source) and GC × GC-MS, and to relate the results of rheological tests to the properties of saturated fractions. The experimental results revealed that inhibitor I1 favored the inhibition process of paraffins when oils have smaller and monocyclic saturated chain hydrocarbon profiles, whereas for oils with larger amounts of polycyclic chain hydrocarbons, the inhibitor I4 appeared to be the alternative [93]. Dong et al developed a comprehensive and in-depth UHRMS analytical method (APCI-Orbitrap Fusion MS) for the production process of Liaohe Petrochemical lubricants.…”

Section: Uhrms Characterization Of Hydrocarbons In Different Complex ...mentioning

confidence: 99%

Molecular Characterization of Hydrocarbons in Petroleum by Ultrahigh-Resolution Mass Spectrometry

et al. 2023

View full text Add to dashboard Cite

The progress in ultrahigh-resolution mass spectrometry (UHRMS) and related technologies has significantly promoted the development of petroleomics. The study of petroleomics has greatly broadened our knowledge of the composition of petroleum at the molecular level, especially heavy fractions that cannot be analyzed by gas chromatography (GC)-based methods. To date, heteroatom-containing (O, N, S, and metal atoms) compounds in petroleum have been studied extensively by UHRMS. Nevertheless, the main components of petroleum, hydrocarbon compounds, have remained out of reach of petroleomics characterization for a long time because they are too difficult to be softly and efficiently ionized for UHRMS analysis. It is undoubtedly the case that petroleum hydrocarbons should not be the missing part of petroleomics characterization since they play important roles not only as feeding pools for various high value-added petroleum products but also as critical biomarkers for geochemistry studies. Here, the most recent breakthroughs in petroleomics characterization of hydrocarbon compounds using UHRMS rather than conventional methods have been reviewed. Innovations of soft ionization methods can transform non-polar hydrocarbon molecules into molecular ions or quasi-molecular ions that are reachable for UHRMS without fragmentation. The development of data processing methods has assisted the decoding of the complicated UHRMS data to visualize the molecular composition and structure of hydrocarbon compounds. These advances make it possible to see the whole picture of petroleum compositions, from light distillation fractions to heavy distillation fractions, and from small volatile molecules to large non-volatile ones. The applications of UHRMS-based methods for petroleomics characterization of hydrocarbon compounds in crude oils and various petroleum samples including fuel oil, slurry, and even asphaltene have made a great contribution to petrochemistry and geochemistry studies, especially in the fields of molecular refining and biomarker discovery.

show abstract

“…Lubricant base oils; 166 Asphaltene fractions; 193,194,[231][232][233][234] Bitumen; 235 S-containing compounds; 28,182,232,[236][237][238][239] polychlorinated naphthalenes (PCNs); 225 polycyclic aromatic hydrocarbons (PAHs); 28,78,226,233,240 Cycloalkanes; 78,241,242 Steroids compounds; 243 N-, O-containing compounds 28,206,232,244,245 More suitable for non-polar samples than ESI but less than APPI. Thermal degradation and fragmentation are problems.…”

Section: Apci (Atmospheric Pressure Chemical Ionization)mentioning

confidence: 99%

Analytics Driving Kinetics: Advanced Mass Spectrometric Characterization of Petroleum Products

et al. 2021

View full text Add to dashboard Cite

The current state-of-the-art in analysis techniques for petroleum fractions has progressed substantially during the last decade. This has helped to further improve the lumping procedures and modeling approaches of these complex systems. Recent advances in gas chromatography (GC), GC-field ionization mass spectrometry (GC-FIMS), and comprehensive gas chromatography (GC × GC) have made it possible to determine the compositions of fractions with up to 45 carbon atoms and in some cases up to C80. The combination of MS techniques with other selective detectors and reversed-phase column combinations has made it possible to quantify even traces of heteroatomic compounds in these complex hydrocarbon matrices. Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR-MS), in some cases combined with GC × GC for the lighter part, has pushed the characterization of larger macromolecules in particular asphaltenes. Matrix-assisted laser desorption/ionization (MALDI) is also used widely for this purpose but has the disadvantage that quantification is not obvious. The development of more detailed characterization techniques has not remained unnoticed in the petrochemical society, and more recently in the petrochemical kinetic modeling society. More detailed characterization of petrochemical fractions has made the implementation of detailed kinetic models for simulation and optimization possible including more and more molecular detail. Additionally, advances in photo-ionization mass spectrometry (PI-MS) have allowed the detection of reactive intermediates and direct kinetic measurements in time-resolved experiments. It can only be expected that this trend will continue and that the application field will move from now primarily petrochemistry, (from catalytic cracking, over hydrotreating and hydrocracking, to pyrolysis, combustion, and steam cracking) to larger-scale chemical recycling and biomass conversion processes.

show abstract

Study of the Effect of Inhibitors Solutions on the Chemical Composition of Waxes by Rheology Tests and High Resolution Mass Spectrometry

Cited by 4 publications

References 9 publications

Study of Thermal Aging of Model Compounds Present in Asphalt Cement by GC/MS, ESI-MS, NMR, and FTIR

Study of Thermal Aging of Model Compounds Present in Asphalt Cement by GC/MS, ESI-MS, NMR, and FTIR

Molecular Characterization of Hydrocarbons in Petroleum by Ultrahigh-Resolution Mass Spectrometry

Analytics Driving Kinetics: Advanced Mass Spectrometric Characterization of Petroleum Products

Contact Info

Product

Resources

About