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Chemical and Mineralogical Composition of Soot and Ash from the Combustion of Peat Briquettes in Household Boilers

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  • Jana Růžičková

    (Centre ENET—Energy Units for Utilization of Non-Traditional, VŠB—Technical University of Ostrava, 17. Listopadu 15/2172, 708 00 Ostrava-Poruba, Czech Republic)

  • Marek Kucbel

    (Centre ENET—Energy Units for Utilization of Non-Traditional, VŠB—Technical University of Ostrava, 17. Listopadu 15/2172, 708 00 Ostrava-Poruba, Czech Republic)

  • Helena Raclavská

    (Centre ENET—Energy Units for Utilization of Non-Traditional, VŠB—Technical University of Ostrava, 17. Listopadu 15/2172, 708 00 Ostrava-Poruba, Czech Republic)

  • Barbora Švédová

    (Centre ENET—Energy Units for Utilization of Non-Traditional, VŠB—Technical University of Ostrava, 17. Listopadu 15/2172, 708 00 Ostrava-Poruba, Czech Republic)

  • Konstantin Raclavský

    (Centre ENET—Energy Units for Utilization of Non-Traditional, VŠB—Technical University of Ostrava, 17. Listopadu 15/2172, 708 00 Ostrava-Poruba, Czech Republic)

  • Michal Šafář

    (Centre ENET—Energy Units for Utilization of Non-Traditional, VŠB—Technical University of Ostrava, 17. Listopadu 15/2172, 708 00 Ostrava-Poruba, Czech Republic)

  • Pavel Kantor

    (Centre ENET—Energy Units for Utilization of Non-Traditional, VŠB—Technical University of Ostrava, 17. Listopadu 15/2172, 708 00 Ostrava-Poruba, Czech Republic)

Abstract

Soot and ash as residues from the combustion of peat briquettes were analysed by chemical and mineralogical methods. The study aimed to characterize combustion in domestic boilers of two different emission classes. Ten samples of soot deposited in exhausting ways of boilers were obtained (five of each emission class). The analyses of organic substances in soot were performed using a combination of the methods for the determination of elemental and organic forms of carbon with analytical pyrolysis. Pyrolysis gas chromatography with mass spectrometric detection (Py-GC/MS) allowed the identification of organic compounds belonging to twenty different groups. The major and minor elements in peat briquettes, char and soot, were determined by X-ray fluorescence spectroscopy. The identification of grains and the chemical character of soot was performed using a scanning electron microscope with energy dispersive X-ray spectrometry. The mineral phases in ash were determined by X-ray diffraction. The behaviour of the inorganic elements in combustion products (ash and soot) was studied by means of an enrichment factor. The analytical results are used for characterizing the technological conditions of combustion. The soot deposits from the more advanced boilers with increased combustion temperature contain more organic compounds which indicate the highly carbonized cellulose (benzofurans and dibenzofurans). The increased combustion temperature is indicated by increased concentrations of heterocyclic and aliphatic nitrogen compounds, while the total concentrations of nitrogen in soot from boilers of both types are comparable.

Suggested Citation

  • Jana Růžičková & Marek Kucbel & Helena Raclavská & Barbora Švédová & Konstantin Raclavský & Michal Šafář & Pavel Kantor, 2019. "Chemical and Mineralogical Composition of Soot and Ash from the Combustion of Peat Briquettes in Household Boilers," Energies, MDPI, vol. 12(19), pages 1-21, October.
  • Handle: RePEc:gam:jeners:v:12:y:2019:i:19:p:3784-:d:273794
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    References listed on IDEAS

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    4. Cao, Wenhan & Martí-Rosselló, Teresa & Li, Jun & Lue, Leo, 2019. "Prediction of potassium compounds released from biomass during combustion," Applied Energy, Elsevier, vol. 250(C), pages 1696-1705.
    5. Werner, Sven, 2017. "District heating and cooling in Sweden," Energy, Elsevier, vol. 126(C), pages 419-429.
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    Cited by:

    1. Rasa Paleckiene & Raminta Navikaite & Rasa Slinksiene, 2021. "Peat as a Raw Material for Plant Nutrients and Humic Substances," Sustainability, MDPI, vol. 13(11), pages 1-13, June.

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