Raman Spectroscopic Investigation of Olefins in Saturated Hydrocarbons and Self-Tuning Model Development

Купцов, А. Х.; Karchevskaya, O. G.; Крон, Т. Е.; Корнеева, Г. А.; Zhmaeva, E. V.

doi:10.1007/s10812-019-00816-2

Cited by 2 publications

(3 citation statements)

References 4 publications

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“…The minor discrepancy in these values is within measurement error. The relative error achieved in this study (∼5%) is slightly higher than that obtained by Kuptsov et al, who achieved a relative error of roughly 5% for total olefins in the 2.5–10 wt % range and around 2.5% in the 10–40 wt % range. This divergence in results might be attributed to differences in the data analysis procedures and algorithms employed for peak integration and quantification between our study and Kuptsov’s.…”

Section: Resultscontrasting

confidence: 69%

“…Most of these studies focus on using Raman spectroscopy to monitor the phase and conformational composition of various polyolefin oligomers. − However, there is only one paper that specifically investigates the application of Raman spectroscopy to hydrocarbon streams that could potentially be used as transportation fuels. In this particular study conducted by Kuptsov et al, Raman spectroscopy was used to comprehensively analyze Fischer–Tropsch streams containing olefins. They examined 11 batches of samples, including synthetic liquid hydrocarbons obtained through the Fischer–Tropsch process and other olefin-containing products derived from hydrogenation and hydroformylation.…”

Section: Introductionmentioning

confidence: 99%

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Exploring the Potential of Raman Spectroscopy for Characterizing Olefins in Olefin-Containing Streams

Gieleciak,

Hall,

Michaelian

et al. 2023

Energy Fuels

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Olefins are highly reactive hydrocarbon compounds that are often found in cracked petroleum and renewable-based products and may be responsible for the formation of gums and solid deposits in storage tanks, refining equipment, and vehicle fuel systems. Several government environmental regulations and industrial specifications are in place to control the levels of olefins in both unprocessed and finished petroleum products. This creates an urgent need for rapid monitoring of olefin levels in petroleum products. Most of the analytical methods currently used for olefin determination have several significant shortcomings, including long analysis times, the need for expensive equipment, high solvent usage, the requirement for high-purity gases (carrier or swift gases), and poor suitability for process monitoring. This paper presents a qualitative and semi-quantitative study of olefins in petroleum samples using Raman spectroscopy. A mixture of unsaturated model hydrocarbons was prepared to demonstrate the suitability of Raman spectroscopy for the determination of olefin contents in petroleum samples. The Raman spectra of the mixture and its individual components were obtained, and the C�C region was used to calculate the integrated area of the region against the olefin concentration. The results show that semi-quantitative analyses for similar mixtures are feasible, and the limit of detection of olefinic species in this particular naphtha is estimated to be approximately 1 vol %. The study also shows that different olefinic species generally do not exhibit the same molar C�C intensities, which may limit the accuracy of quantitative work. The proposed approach for olefin determination may be limited, but it can be developed and utilized for the determination of olefin concentrations in samples containing similar types of olefins and blended in a similar naphtha matrix. The study emphasizes the importance of the calibration procedure being sensitive to the type of selected olefin standards and the nature of the hydrocarbon matrix in the blend.

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Section: Resultscontrasting

confidence: 69%

Section: Introductionmentioning

confidence: 99%

Exploring the Potential of Raman Spectroscopy for Characterizing Olefins in Olefin-Containing Streams

Gieleciak,

Hall,

Michaelian

et al. 2023

Energy Fuels

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“…Gas Chromatography (GC) (CP-3800, Varian, USA) was used to determine feed and product compositions and this analysis is based on ASTM D-5134 standard with the Cpsil CB column (height and diameter of 50 m and 0.5 μm, respectively). 50,51 The GC-Cp-wax52 column (height and diameter of 25 m and one μm, respectively) was used to attain morpholine and N-formyl morpholine (NFM) contents of the feed and products. The GC condition is as follows: oven Temp.…”

Section: Characterization and Instrumentationmentioning

confidence: 99%

Optimizing temperature and introducing new process arrangements for elevating clay's longevity based on the known poisons in the separation process of trace olefins from aromatics

Rouhani

Farhadi

Kenari

et al. 2021

J of Chemical Tech & Biotech

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BACKGROUND The clay treatment widely utilized to reduce unsaturated components in aromatic stream has a detrimental effect on catalyst lifetime. Due to the short lifetime of commercial clay, a huge number of studies have been carried out to address this problem over the last decade. This study aims to optimize the temperature for longer serviceability of clay by removal of unsaturated aliphatic components from aromatic streams through the adsorption and catalytic properties of clay. A novel process arrangement is introduced by scheduling the reuse of deactivated clay that is discarded after deactivation. RESULTS Results showed that the suitable range of temperature for olefin removal is 155–205 °C, and the optimum temperature with the lowest operational cost was 185 °C, which is then gradually elevated to 205 °C. CONCLUSION The new process arrangements utilize these results and elevate clay's lifetime by almost 3.5 times, leading to an economical solution on an industrial scale. © 2021 Society of Chemical Industry (SCI).

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Raman Spectroscopic Investigation of Olefins in Saturated Hydrocarbons and Self-Tuning Model Development

Cited by 2 publications

References 4 publications

Exploring the Potential of Raman Spectroscopy for Characterizing Olefins in Olefin-Containing Streams

Exploring the Potential of Raman Spectroscopy for Characterizing Olefins in Olefin-Containing Streams

Optimizing temperature and introducing new process arrangements for elevating clay's longevity based on the known poisons in the separation process of trace olefins from aromatics

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