Gasoline analysis by 1H nuclear magnetic resonance spectroscopy

Meusinger, Reinhard

doi:10.1016/0016-2361(96)00053-1

Cited by 62 publications

(51 citation statements)

References 20 publications

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“…This fact may be related to the different origins of the petroleum or specific chemical processes for each type. The vinyl hydrogens signals were assigned as d 5.1-4.8 and 6.5-5.9 for monosubstituted (RHC=CHH, RHC=CHH, respectively); These assignments agree with Burri et al, 32 Meusinger, 30 and Sun and Wang. 40 The signal areas of the aliphatic (d 1.8-0.4) and aromatic (d 8.0-6.5) hydrogens from CG, PG and M 1,5,9 samples (Figure 3), supported the proportions between AKI, aromatic and saturated contents, previously determined by IR analyses (Figure 1).…”

Section: Samplesupporting

confidence: 84%

“…20,25 In this context, NMR spectroscopy demonstrates great applicability since the technique does not require any physical separation or pretreatment. 29,30 Moreover, 1 H NMR measurements are rapid and can be easily automated, allowing the analysis of a large number of samples in a short period of time. NMR also brings the possibility of qualitative and quantitative analyses in a single experiment, since there is a direct proportionality between the area of the signals and the number of nuclei responsible for those signals.…”

Section: Introductionmentioning

confidence: 99%

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1H NMR and Chemometric Methods to Estimate the Octane Number in Brazilian C Gasolines

Pinto¹,

Gambarra-Neto²,

Flores³

et al. 2020

J. Braz. Chem. Soc.

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Brazilian gasoline type C can be purchased with octane number as the main difference. This quality parameter directly affects the price. Intermediate formulations may not be easily distinguished from conform samples due to similarity in visual appearance and physicochemical properties. The use of anhydrous ethanol as an additive also influences the octane values of the product. In this context, the present study describes the use of 1 H nuclear magnetic resonance spectroscopy (1 H NMR) associated with chemometrics in the characterization and distinction of gasolines by different octane number. Conform samples of common, premium and blends of common-premium were used. Models of NMR-PCA (principal component analysis) and NMR-SIMCA (soft independent modelling of class analogies) showed a good correlation with the values determined by the standard method. The octane values predicted by the NMR-PLS (partial least squares) model achieved a good correlation root mean square errors of prediction (RMSEP = 0.50), with the values determined by the standard method as well.

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Section: Samplesupporting

confidence: 84%

Section: Introductionmentioning

confidence: 99%

1H NMR and Chemometric Methods to Estimate the Octane Number in Brazilian C Gasolines

Pinto¹,

Gambarra-Neto²,

Flores³

et al. 2020

J. Braz. Chem. Soc.

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“…1 H NMR spectra of the two samples, MTW-C8 and SPA-C8, are shown in Figure . The chemical shift ranges for aliphatics, olefins, and aromatics are well-established in the literature. , The aliphatic region appears at 0.8–3 ppm. We observe peaks in the methyl, methylene, methyne, and olefinic regions.…”

Section: Resultsmentioning

confidence: 71%

Oligomerization of Light Olefins to Gasoline: An Advanced NMR Characterization of Liquid Products

Nicholas

Laipert

Prabhakar

2016

Ind. Eng. Chem. Res.

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Using multiple 1 H and 13 C NMR spectroscopic techniques, we have investigated the C8 cut from samples of liquid products obtained by the oligomerization of light olefins over solid phosphoric acid (SPA) and MTW zeolite. The carbon species present, CH n (n = 0−3), were identified by DEPT NMR and quantified using inverse-gated decoupled 13 C NMR spectra. The olefinic protons and carbons as well as the types of olefins were quantified. 13 C NMR shows that the amount of methyl carbons is similar for both catalysts but that methylene and methyne carbon distributions are different. The product obtained over MTW catalyst showed higher quantities of quaternary olefins, likely from type V tetrasubstituted olefins, compared to that over SPA catalyst. In addition, 2D NMR has also been attempted to understand the proton and carbon connectivities and confirmed the presence of type I and II olefins.

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“…The research octane number (RON) is broadly estimated from the chemical composition of the fuels determined with the help of high-resolution GC [5,6], FTIR spectroscopy [7] and NMR analysis [8,9]. Cetane number prediction is generally based on the concentration of aromatic compounds and density values of oils.…”

Section: Relation Of Major Oil Characteristics and Chemical Features mentioning

confidence: 99%

Composition of Liquid Fuels Derived from the Pyrolysis of Plastics

Blazsó¹

2006

Feedstock Recycling and Pyrolysis of Waste Plastics

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Gasoline analysis by 1H nuclear magnetic resonance spectroscopy

Cited by 62 publications

References 20 publications

1H NMR and Chemometric Methods to Estimate the Octane Number in Brazilian C Gasolines

1H NMR and Chemometric Methods to Estimate the Octane Number in Brazilian C Gasolines

Oligomerization of Light Olefins to Gasoline: An Advanced NMR Characterization of Liquid Products

Composition of Liquid Fuels Derived from the Pyrolysis of Plastics

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