Submit an Article
Become a reviewer
Vyacheslav А. Rudko
Vyacheslav А. Rudko
Executive Director, Ph.D.
Saint Petersburg Mining University
Executive Director, Ph.D.
Saint Petersburg Mining University
Saint Petersburg
Russia
388
Total cited
13
Hirsch index

Articles

Geotechnical Engineering and Engineering Geology
  • Date submitted
    2023-10-22
  • Date accepted
    2024-03-05
  • Online publication date
    2024-04-11
  • Date published
    2024-04-11

The mechanism and thermodynamics of ethyl alcohol sorption process on activated petroleum coke

Article preview

The low-quality petcoke does not find qualified application and is stockpiled at refineries or used as solid fuel. One of the promising ways to use low-quality petroleum coke is its physical or chemical activation in order to obtain a highly porous carbon material that can be used as a catalyst carrier, adsorbent, base for electrodes, etc. The possibility of using petroleum coke to produce sorbent for organic compounds was studied. The activated petroleum cake was obtained by chemical activation with KOH, a specific surface area is 1218 m2/g. Sorption of ethyl alcohol was studied at temperatures 285, 293 and 300 K. It is a physical process proceeding mainly in pores of activated petroleum coke, also sorption can be described as a reversible exothermic process. The effective Gibbs energy at a temperature of 293 K is –12.74 kJ/mol, the heat of sorption is –26.07 kJ/mol. The obtained data confirm that porous carbon material obtained from petroleum coke can be used as sorbent for ethanol at room temperature. For example, for adsorption of bioethanol from the effluent of the fermentation process or for purification of wastewater from organic compounds.

How to cite: Litvinova T.E., Tsareva A.A., Poltoratskaya M.E., Rudko V.A. The mechanism and thermodynamics of ethyl alcohol sorption process on activated petroleum coke // Journal of Mining Institute. 2024. p. EDN YUGLTO
Geotechnical Engineering and Engineering Geology
  • Date submitted
    2023-05-17
  • Date accepted
    2023-08-17
  • Online publication date
    2023-09-08
  • Date published
    2023-10-27

Scientific and technical substantiation of the possibility for the organization of needle coke production in Russia

Article preview

Russia is one of the world's leading steel producers, while about 33 % of production comes from the scrap remelted in arc steelmaking furnaces. The graphitized electrodes of SHP and UHP grades, mainly consisting of needle coke, are used for high current loads and temperatures in furnaces. USA, Japan, Korea, and China are focused on needle coke production, where coal (tar and pitch) and petroleum (decantoil), by-products of metallurgical factories and oil refineries, are used as raw materials. Russia's annual demand for needle coke is approximately 100 thousand tons, but all of it is covered by imports. Russia's raw material potential, established by the authors of the article, is more than 5 million tons per year and includes decantoil, coal tar and pitch, and heavy pyrolysis tar. The results of obtaining needle coke from decantoil and heavy pyrolysis tar are given below. The prototypes of needle coke were produced on specially designed delayed coking laboratory units (loading up to 0.25 and 80 kg). Raw materials were modified according to the original technology of Saint Petersburg Mining University, the convergence of target properties of which is confirmed by the results of quality analysis of the obtained needle coke, including after 100-fold scaling. The electrodes were molded from the obtained coke. After standardized stages of firing, mechanical processing and graphitization at 2,800-3,000 °C, the coefficient of linear thermal expansion was less than 1 × 10–6 К–1, and the value of specific electrical resistance was 7.1-7.4 μOhm, which proves that the obtained carbon material corresponds in quality to Japanese analogues and Super Premium needle coke.

How to cite: Rudko V.А., Gabdulkhakov R.R., Pyagai I.N. Scientific and technical substantiation of the possibility for the organization of needle coke production in Russia // Journal of Mining Institute. 2023. Vol. 263. p. 795-809. EDN KYNHWL
Oil and gas
  • Date submitted
    2019-04-03
  • Date accepted
    2022-12-02
  • Date published
    2020-02-25

Influence of parameters of delayed asphalt coking process on yield and quality of liquid and solid-phase products

Article preview

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.    

How to cite: Kondrasheva N.K., Rudko V.A., Nazarenko M.Y., Gabdulkhakov R.R. Influence of parameters of delayed asphalt coking process on yield and quality of liquid and solid-phase products // Journal of Mining Institute. 2020. Vol. 241. p. 97. DOI: 10.31897/PMI.2020.1.97
Metallurgy and concentration
  • Date submitted
    2017-06-30
  • Date accepted
    2017-09-09
  • Date published
    2017-12-25

Influence of dispersing additives and blend composition on stability of marine high-viscosity fuels

Article preview

The article offers a definition of the stability of marine high-viscosity fuel from the point of view of the colloid-chemical concept of oil dispersed systems. The necessity and importance of the inclusion in the current regulatory requirements of this quality parameter of high-viscosity marine fuel is indicated. The objects of the research are high-viscosity marine fuels, the basic components of which are heavy oil residues: fuel oil that is the atmospheric residue of oil refining and viscosity breaking residue that is the product of light thermal cracking of fuel oil. As a thinning agent or distillate component, a light gas oil was taken from the catalytic cracking unit. The stability of the obtained samples was determined through the xylene equivalent index, which characterizes the stability of marine high-viscosity fuel to lamination during storage, transportation and operation processes. To improve performance, the resulting base compositions of high-viscosity marine fuels were modified by introducing small concentrations (0.05 % by weight) of stabilizing additives based on oxyethylated amines of domestic origin and alkyl naphthalenes of foreign origin.

How to cite: Mitusova T.N., Kondrasheva N.K., Lobashova M.M., Ershov M.A., Rudko V.A. Influence of dispersing additives and blend composition on stability of marine high-viscosity fuels // Journal of Mining Institute. 2017. Vol. 228. p. 722. DOI: 10.25515/PMI.2017.6.722