Thermo-optical properties of residential coals and combustion aerosols

Máté Pintér, Tibor Ajtai, Gergely Kiss-Albert, Noémi Utry, Diána Kiss, T. Smausz, Attila Kohut, B. Hopp, G. Galbács, Á. Kukovecz, Z. Kónya, Gábor Szabó, Z. Bozóki

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

In this study, we present the inherent optical properties of carbonaceous aerosols generated from various coals (hard through bituminous to lignite) and their correlation with the thermochemical and energetic properties of the bulk coal samples. The nanoablation method provided a unique opportunity for the comprehensive investigation of the generated particles under well controlled laboratory circumstances. First, the wavelength dependent radiative features (optical absorption and scattering) and the size distribution (SD) of the generated particulate matter were measured in-situ in aerosol phase using in-house developed and customised state-of-the-art instrumentation. We also investigated the morphology and microstructure of the generated particles using Transmission Electron Microscopy (TEM) and Electron Diffraction (ED). The absorption spectra of the measured samples (quantified by Absorption Angström Exponent (AAE)) were observed to be distinctive. The correlation between the thermochemical features of bulk coal samples (fixed carbon (FC) to volatile matter (VM) ratio and calorific value (CV)) and the AAE of aerosol assembly were found to be (r2 = 0.97 and r2 = 0.97) respectively. Lignite was off the fitted curves in both cases most probably due to its high optically inactive volatile material content. Although more samples are necessary to be investigated to draw statistically relevant conclusion, the revealed correlation between CV and Single Scattering Albedo (SSA) implies that climatic impact of coal combusted aerosol could depend on the thermal and energetic properties of the bulk material.

Original languageEnglish
Pages (from-to)118-128
Number of pages11
JournalAtmospheric Environment
Volume178
DOIs
Publication statusPublished - Apr 1 2018

Fingerprint

optical property
combustion
coal
aerosol
lignite
energetics
scattering
absorption spectrum
diffraction
instrumentation
albedo
transmission electron microscopy
particulate matter
microstructure
wavelength
electron
carbon
particle
material

Keywords

  • Aerosol Angström Exponent
  • Calorific value
  • Household coal
  • Laser ablation
  • PhotoAcoustic Spectroscopy

ASJC Scopus subject areas

  • Environmental Science(all)
  • Atmospheric Science

Cite this

Thermo-optical properties of residential coals and combustion aerosols. / Pintér, Máté; Ajtai, Tibor; Kiss-Albert, Gergely; Utry, Noémi; Kiss, Diána; Smausz, T.; Kohut, Attila; Hopp, B.; Galbács, G.; Kukovecz, Á.; Kónya, Z.; Szabó, Gábor; Bozóki, Z.

In: Atmospheric Environment, Vol. 178, 01.04.2018, p. 118-128.

Research output: Contribution to journalArticle

Pintér, Máté ; Ajtai, Tibor ; Kiss-Albert, Gergely ; Utry, Noémi ; Kiss, Diána ; Smausz, T. ; Kohut, Attila ; Hopp, B. ; Galbács, G. ; Kukovecz, Á. ; Kónya, Z. ; Szabó, Gábor ; Bozóki, Z. / Thermo-optical properties of residential coals and combustion aerosols. In: Atmospheric Environment. 2018 ; Vol. 178. pp. 118-128.
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AU - Smausz, T.

AU - Kohut, Attila

AU - Hopp, B.

AU - Galbács, G.

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AB - In this study, we present the inherent optical properties of carbonaceous aerosols generated from various coals (hard through bituminous to lignite) and their correlation with the thermochemical and energetic properties of the bulk coal samples. The nanoablation method provided a unique opportunity for the comprehensive investigation of the generated particles under well controlled laboratory circumstances. First, the wavelength dependent radiative features (optical absorption and scattering) and the size distribution (SD) of the generated particulate matter were measured in-situ in aerosol phase using in-house developed and customised state-of-the-art instrumentation. We also investigated the morphology and microstructure of the generated particles using Transmission Electron Microscopy (TEM) and Electron Diffraction (ED). The absorption spectra of the measured samples (quantified by Absorption Angström Exponent (AAE)) were observed to be distinctive. The correlation between the thermochemical features of bulk coal samples (fixed carbon (FC) to volatile matter (VM) ratio and calorific value (CV)) and the AAE of aerosol assembly were found to be (r2 = 0.97 and r2 = 0.97) respectively. Lignite was off the fitted curves in both cases most probably due to its high optically inactive volatile material content. Although more samples are necessary to be investigated to draw statistically relevant conclusion, the revealed correlation between CV and Single Scattering Albedo (SSA) implies that climatic impact of coal combusted aerosol could depend on the thermal and energetic properties of the bulk material.

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