Based on systematized collection of Raman spectra of about 40 monounsaturated olefins, spectral patterns and invariant relations were established that formed the basis of the method for determining total olefins (total unsaturation per 100 carbon atoms) and their main classes in solutions of saturated hydrocarbons. Self-tuning of the model by calculating the proportion of spectrally unresolvable C=C components using the intensity of conjugated methyl groups increased its accuracy. In terms of repeatability, speed and cost-effectiveness of the analysis, the Raman-method is superior to standard methods of gas and adsorption chromatography and other modern spectralcorrelation methods. The accuracy and stability of the results repeatability is confirmed by more than annual series of parallel comparisons with the data of known method. It is shown that five types of olefins in paraffin model solutions are sufficient to construct calibration curves in units of the number of C=C bonds per 100 carbon atoms. These units make it possible to transform the data to the iodine scale and unify the calibration model for different fractions regardless of the hydrocarbon chain length. The Raman technique can be extended to analyze other mixtures of nonaromatic hydrocarbons and be used for remote control of processes via fi ber optic cables in industrial production.
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References
P. Chabot, M. Simpson, and F. Melas, Special Report, Instrumentation & Analytics. ABB Review, 54–60 (2006).
Strategies for Achieving Optimal Gasoline Blending; https://www.honeywellprocess.com/library/marketing/casestudies/WhitePaper_Valero_OptimizedGasolineBlending.pdf (accessed December 27, 2018).
A. Kh. Kuptsov, O. G. Karchevskaya, E. E. Kron, and E. V. Zhmaeva, Neft. Khoz., No. 10, 125–127 (2016).
D. L. Gerrard, In: Analytical Raman Spectroscopy Chemical Analysis, 114, Eds. J. G. Grasselli, B. J. Bulkin, Ch. 9, John Wiley & Sons Inc., New York (1991).
A. L. Lapidus and O. L. Eliseev, Gazokhimiya, No. 1, 26–30 (2008).
X. Zhang, X. Qi, M. Zou, and J. Wu, J. Raman Spectrosc., 43, No. 10, 1487–1491 (2012).
K. M. Tan, I. Barman, N. C. Dingari, G. P. Singh, T. F. Chia, and W. L. Tok, Anal. Chem., 85, No. 3, 1846–1851 (2013).
Rory H. Uibel, Robert E. Benner, Eric R. Jacobsen, and Lee M. Smith, Methods for Determining Olefin Concentrations in Olefin-Containing Fuels, US Patent No. 7973926 B1 (2011).
J. A. Ardila, F. L. F. Soares, M. A. S. Farias, and R. L. Carneiro, Anal. Lett., 50, No. 7, 1126–1138 (2017).
A. H. Kuptsov and G. N. Zhizhin, Handbook of Fourier Transform Raman and Infrared Spectra of Polymers, Elsevier Science, Amsterdam (1998), p. 581.
Elsevier FT-Raman and FT-IR Polymer Database for ACD/Labs; https://www.acdlabs.com/products/dbs/ir_raman_db/(accessed December 27, 2018).
A. Kh. Kuptsov and G. N. Zhizhin, Fourier Transform Raman and Fourier Transform IR Spectra of Polymers [in Russian], Tekhnosfera, Moscow (2013).
G. Socrates, Infrared and Raman Characteristic Group Frequencies. Tables and Charts, 3rd ed., John Wiley & Sons Ltd. (2001), pp. 68–78.
Yu. V. Shemuratov, E. A. Sagitova, K. A. Prokhorov, G. Yu. Nikolaeva, and P. P. Pashinin, in: Coll. Sci. Works "Physical Chemistry of Polymers. Synthesis, Properties and Application" [in Russian], Tver State University, Tver, Vol. 15 (2009), pp. 51–62.
Yu. V. Shemouratov, K. A. Prokhorov, G. Yu. Nikolaeva, P. P. Pashinin, A. A. Kovalchuk, A. N. Klyamkina, P. M. Nedorezova, K. V. Demidenok, Yu. A. Lebedev, and E. M. Antipov, Laser Phys., 18, No. 5, 554–567 (2008).
RMG 61-2010 State system for ensuring the uniformity of measurements. Indicators of accuracy and precision of methods for quantitative chemical analysis. Evaluation methods [in Russian].
Raman Method Improves Olefin Measurement. Process Instruments Inc., https://www.rdmag.com/productrelease/2009/03/raman-method-improves-olefin-measurement (accessed July 20, 2016).
A. Kh. Kuptsov, T. E. Kron, O. G. Karchevskaya, and G. A. Korneeva, "Method for the Determination of Olefin in Synthetic Liquid Hydrocarbons Obtained by the Fischer–Tropsch Method (Versions)" [in Russian], RF Patent No. 2581191 (2016).
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Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 86, No. 2, pp. 290–297, March–April, 2019.
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Kuptsov, A.K., Karchevskaya, O.G., Kron, T.E. et al. Raman Spectroscopic Investigation of Olefins in Saturated Hydrocarbons and Self-Tuning Model Development. J Appl Spectrosc 86, 300–307 (2019). https://doi.org/10.1007/s10812-019-00816-2
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DOI: https://doi.org/10.1007/s10812-019-00816-2