METHODS FOR THE DETERMINATION OF SODIUM IN THE PROCESS OF WATER WASHING OF SALTY COAL

  • A.I. Fateev Coal Energy Technology Institute of National Academy of Sciences of Ukraine, Kyiv
  • S.I. Krivosheev Coal Energy Technology Institute of National Academy of Sciences of Ukraine, Kyiv
  • V.A. Kvitsinnsky Coal Energy Technology Institute of National Academy of Sciences of Ukraine, Kyiv
  • T.G. Shendrik Institute of Physical-Organic and Coal Chemistry of National Academy of Sciences of Ukraine, Kyiv
Keywords: atomic absorption spectrometry, flame emission method, electrochemical method, salty coal, desalination, sodium

Abstract

Coal with high content of alkaline and alkaline earth metals (salty coal) occupies its definite place in an energy reserve of the country. Standard methods to assess the dynamics of the release of salts (mainly sodium chloride) into the aqueous solution during the desalting of salty coal were used. The advantages and disadvantages of existing methods for determining the sodium content in aqueous solutions are considered. The principle of operation of the upgraded spectral complex KSVU-5 based on the determination of the content of alkali metals in aqueous solutions by the method of atomic emission analysis is presented. The remarkable reproducibility of the measurements results on the spectral complex of small and large concentration of Na in solution is shown. The results of an experimental study of the desalting process by water washing of salty coal samples of various size classes (in the range 0-5 mm) and analysis of the obtained solutions by the spectral complex KSVU-5 are presented. Comparison of the sodium concentration in solutions during the desalting of salty coal obtained by atomic absorption and atomic emission analysis was performed. The possibility of using express analysis (Conductivity/TDS) to determine the concentration of sodium in solution is shown. Ref. 8, Fig. 6.

Author Biographies

S.I. Krivosheev, Coal Energy Technology Institute of National Academy of Sciences of Ukraine, Kyiv

Candidate of Technical Sciences

T.G. Shendrik, Institute of Physical-Organic and Coal Chemistry of National Academy of Sciences of Ukraine, Kyiv

Doctor of Chemical Sciences, Professor

References

Ivanova A.V. [Genesis and evolution of high-chlorine coals of Ukraine and use problems]. Dis. ... doct. geologich. nauk. Kiev : [Institute of Geological Sciences of NASU], 2016. 20 p. (Rus.)

Shendrik T.G., Saranchuk V.I. [Salty coals]. Donetsk : Sxidnyj vydavnychyj dim, 2003. 296 p. (Rus.)

Biletskyy V.S., Pogidaev S.D., Kheloufi A., Sergeev P.V. [Perspectives of development salty coals of Ukraine]. Donetsk : DonSTU, UCCS, 1998. 96 p. (Rus.)

Fateev A.I., Romanova L.A. [Influence of technological factors on the process of washing harmful impurities from the saline coal of Ukraine]. Energo- technologii i Resursosberezhenie [Energy Technologies and Resource Saving]. 2014. No. 3. pp. 6–10. (Rus.)

Fateyev A.I., Shendrik T.G., Polishchuk S.S., Dunayevska N.I. The energy technological background of involving salty coals into energy balance of Ukraine. 1. Composition of water extracts and the prospects for their utilization. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2018. No. 6. р. 40–47.

Doerffel K. [Statistics in Analytical Chemistry]. Moscow : Mir, 1994. 268 p. (Rus.)

Oreshenkova E.G. [Spectral analysis]. Moscow : Vysshaja shkola, 1962. 276 p. (Rus.)

Rabinovich V.A., Havin Z.Ya. [Brief Chemical Handbook]. Leningrad : Himija, 1978. 392 p. (Rus.)

Published
2020-03-20
How to Cite
Fateev, A., Krivosheev, S., Kvitsinnsky, V., & Shendrik, T. (2020). METHODS FOR THE DETERMINATION OF SODIUM IN THE PROCESS OF WATER WASHING OF SALTY COAL. Energy Technologies & Resource Saving, (1), 19-26. https://doi.org/10.33070/etars.1.2020.2