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Vol 241
Pages:
97
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Influence of parameters of delayed asphalt coking process on yield and quality of liquid and solid-phase products

Authors:
N. K. Kondrasheva1
V. A. Rudko2
M. Yu. Nazarenko3
R. R. Gabdulkhakov4
About authors
  • 1 — Saint Petersburg Mining University
  • 2 — Saint Petersburg Mining University
  • 3 — Saint Petersburg Mining University
  • 4 — Saint Petersburg Mining University
Date submitted:
2019-04-03
Date accepted:
2022-12-02
Date published:
2020-02-25

Abstract

Paper studies the effect of excess pressure during delayed coking of asphalt, obtained by propane deasphaltization of tar, on yield and physical and chemical properties of hydrocarbon fuels' components and solid-phase product – petroleum coke. Asphalt was coked at a temperature of 500 °C and excess pressure of 0.15-0.35 MPa in a laboratory unit for delayed coking of periodic action. Physical and chemical properties of raw materials and components of light (gasoline), medium (light gasoil), and heavy (heavy gasoil) distillates obtained during experimental study were determined: density, viscosity, coking ability, sulfur content, iodine number, pour points, flash points, fluidity loss and fractional composition. Quantitative group hydrocarbon and microelement compositions and properties of obtained samples of petroleum coke (humidity, ash content, volatiles' yield, sulfur content, etc.) were also studied. Comparative assessment of their quality is given in accordance with requirements of GOST 22898-78 “Low-sulfur petroleum coke. Specifications”. In addition, patterns of changes in excess coking pressure on yield and quality indicators of distillate products and petroleum coke were revealed. With an increase in excess pressure of coking process from 0.15 to 0.35 MPa, content of paraffin-naphthenic hydrocarbons in light and heavy gasoils of delayed coking  decreases. Common pattern in asphalt coking is an increase in yield of coke and hydrocarbon gas with an increase in excess pressure from 0.15 to 0.35 MPa.    

10.31897/pmi.2020.1.97
Go to volume 241

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