This paper includes the problem statement of obtaining environmentally friendly high-viscosity marine fuels, as well as a possible technological solution consisting in sequential oil processing in an atmospheric-vacuum unit, processing of the vacuum residue with or without preliminary deasphalting in a delayed coking unit, and subsequent compounding of middle and heavy distillates from the delayed coking unit with low-sulfur fractions. The research targets were tar and asphalt, which had been obtained from tar in the process of propane deasphalting. These residues were subjected to coking at 500 °C and a pressure of 0.15–0.35 MPa. Physical properties, chemical composition, and quantitative group hydrocarbon and trace-metal compositions (including vanadium and nickel) were determined for the feed and the obtained middle and heavy distillates. The possibility of applying the maximum amount of coking distillates to obtain environmentally friendly compositions of marine fuel with a sulfur content of up to 0.5 wt % was evaluated.

中文翻译：

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延迟焦化压力对用作环保船用燃料的中，重质馏分油的产率和质量的影响

本文介绍了获取环保型高粘度船用燃料的问题陈述，以及可能的技术解决方案，包括在常压真空装置中顺序进行油处理，在延迟焦化装置中进行或不进行预脱沥青的真空残渣处理，然后将延迟焦化装置中的中级和重质馏分与低硫馏分混合。研究的目标是焦油和沥青，它们是在丙烷脱沥青过程中从焦油中获得的。这些残留物在500°C和0.15–0.35 MPa的压力下进行焦化。确定了进料和所得中馏分和重馏分的物理性质，化学组成以及烃和痕量金属的定量基团组成（包括钒和镍）。