Low-Viscosity Marine Fuel Based on Heavy Diesel Fractions of Secondary Origin: Problems and Solutions
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Viscosity Marine Fuel Based on Heavy Diesel Fractions of Secondary Origin: Problems and Solutions Zh. N. Artemevaa, *, S. G. Dyachkovab, **, I. E. Kuzoraa, T. I. Vakulskayac, ***, D. V. Pavlovc, and M. A. Lonina aAO
Angarsk Petrochemical Company, Angarsk, Irkutsk oblast, 665830 Russia National Research Technical University of Irkutsk, Irkutsk, 664074 Russia c Favorsky Institute of Chemistry, Siberian Branch, Russian Academy of Sciences, Irkutsk, 664033 Russia *e-mail: [email protected] **e-mail: [email protected] ***e-mail: [email protected] b
Received September 20, 2019; revised April 21, 2020; accepted May 12, 2020
Abstract—Optimal formulations of low-viscosity marine fuel (LMF) involving heavy diesel fractions of secondary origin and containing cold flow improvers and antioxidants have been found by mathematical modeling using the pour point, sulfur content, and density as critical parameters. The experimentally obtained characteristics of laboratory LMF samples prepared according to the calculated formulations correlate well with theoretical data and comply with the requirements of regulatory documents. The possibility of involving heavy distillates, produced by Angarsk Petrochemical Company, in LMF is shown. The antioxidant Kerobit TP 26 P is proposed as a stabilizer in the production of LMF composed of a heavier diesel fraction from the atmospheric column of the GK-3 unit and the atmospheric–vacuum distillation residue of the hydrogenated product from units for hydrotreating of heavy middle-distillate fractions of primary and secondary oil refining. The effectiveness of the antioxidant has been evaluated in terms of change in total sediment, which is a measure of oxidative stability, as well as by the existent gum content. The EPR technique has proved the occurrence of radical reactions during storage of heavy diesel fractions of secondary origin and the inhibitory effect of Kerobit-TP 26 P on these processes. Keywords: low-viscosity marine fuel, heavy distillates, antioxidant additives, depressants and cold flow improvers, existent gum, oxidative stability DOI: 10.1134/S0965544120090030
The main directions of processing middle and heavy distillates of secondary origin are catalytic processes that require significant investments for their implementation [1]. Therefore, the involvement of fractions of secondary origin as components in commercial fuels is currently one of the urgent tasks, the solution of which can significantly improve the economic and environmental performance of oil refineries. Since the 1990s, low-viscosity marine fuel (LMF) is one of the high-production-volume petrochemicals manufactured by domestic oil refining and delivered both to the domestic market and for export [2, 3]. In [4–9] we showed the possibility of involving secondary oil refining products of Angarsk Petrochemical Company (APC) in the production of LMF that meets the requirements of the technical regulation of the Customs Union “On requirements for automotive and aviation gasoline, diesel and marine fuel,
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