Spectroscopic analysis of coal plasma emission produced by laser ablation

Vera-Londoño, Liliana Patricia; Taborda, Jaime Andrés Pérez; Riascos-Landázuri, Henry

doi:10.17533/udea.redin.n78a09

Cited by 4 publications

(3 citation statements)

References 13 publications

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“…Thus, the vibrational temperature using AlO and CaO molecular bands are equal to 0.67 and 0.66 eV, respectively. Similar to the result reported by Vera-Londoño et al, the value 0.67 eV is with high correlation value of 0.76 ≈ 1 [16].…”

Section: Plasma Parameters Using Alo Molecular Bandssupporting

confidence: 90%

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Study of Electronic Bands of Diatomic Molecules for the Evaluation of Toxicity of Green Crackers Using LIBS Coupled with Chemometric Method

Dubey

Kumar

Dwivedi

et al. 2022

Electronic Materials

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Laser-induced Breakdown Spectroscopy (LIBS) is primarily an atomic emission spectroscopic method based on analyzing the spectral lines of elements in the laser-induced plasma. However, when the plasma cools down after its ignition, i.e., when one collects the emissions from the plasma after a certain interval of time/gate delay (~1 micro-second), the signature of the electronic bands of diatomic molecules is also observed along with ionic/atomic emission lines. The present manuscript reports the evaluation of toxicity/pollutants in green crackers based on the intensity of the electronic bands of the Aluminum Oxide (AlO), calcium oxide (CaO), and strontium oxide (SrO) molecules observed in the laser-induced plasma of the firecrackers. LIBS spectra of the green crackers show the presence of spectral lines of the heavy/toxic elements such as Al, Ca, Sr, Cr, Cu, and Ba, along with the electronic bands of the AlO, CaO, and SrO. Fourier Transform Infra-Red Spectroscopy (FTIR) has been used to validate the LIBS results and confirm the molecules in these crackers. The concentration of toxic elements in green crackers such as Aluminum (Al), Copper (Cu), and Chromium (Cr) has also been estimated using the Partial Least Square Regression method (PLSR) to evaluate and compare the extent of the toxicity of green crackers.

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Section: Plasma Parameters Using Alo Molecular Bandssupporting

confidence: 90%

“…The value 0.67 eV is with a high correlation value that is R 2 of 0.76 ≈ 1. Thus, in the present case, the vibrational temperature (which implies plasma temperature) is found to be 12,000 K, almost close to the plasma temperature calculated using spectral lines of the elements [16].…”

Section: Plasma Parameters Using Alo Molecular Bandssupporting

confidence: 86%

Study of Electronic Bands of Diatomic Molecules for the Evaluation of Toxicity of Green Crackers Using LIBS Coupled with Chemometric Method

Dubey

Kumar

Dwivedi

et al. 2022

Electronic Materials

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“…Later, Li et al [14] reported the wavelength dependence studies for the carbon content in coal using the fundamental (1064 nm) and fourth (266 nm) harmonics of Nd:YAG laser. Vera-Londono et al [15] reported the elemental analysis of coal under ambient conditions, and from the C 2 Swan band, the vibrational temperature was estimated as 0.62 eV. Feng et al [12] reported the elemental concentrations of thirty-three bituminous coal samples using the partial least squares (PLS) model based on the dominant factor.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Carbon Contents and Heavy Metals in Coal Samples Using Calibration-free LIBS Technique

Israr

Abbas

Haq

et al. 2022

Journal of Spectroscopy

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We report a compositional analysis of four coal samples collected from different mines in Pakistan and one Chinese brand. The coal samples were pelletized in the form of a disc and irradiated with a focused laser beam of fundamental (1064 nm) and second (532 nm) harmonics of Nd:YAG laser, which produced plasma on the sample surface. The plasma emissions were recorded using a broadband (200–800 nm), high-resolution spectrometer (LIBS2500plus, Ocean Optics Inc., USA), which shows that the emission spectra from 532 nm, were more intense and dense in comparison with 1064 nm spectra. The compositional analysis of coal samples was performed using the calibration-free LIBS technique, utilizing the plasma temperature and self-absorption corrected emission line intensities. The analysis yields a number of major and trace elements in coal samples, among which the concentration of carbon varies from 642 to 718 g/kg, and sulfur contents were detected as 1.1 to 7.2 g/kg. The heavy metals chromium and lead were detected in the range of 14 to153 and 210 to 252 ppm, respectively. In addition, the gross calorific value (GCV) of all the coal samples was estimated using the concentrations of carbon, hydrogen, nitrogen, oxygen, and sulfur from 26.40 to 27.18 MJ/kg, which is an important parameter to determine the coal quality and burning efficiency.

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Emission spectroscopic characterization of a copper plasma by using (LIPS) technique

Nasif

Ahmed

Aadim

2022

3rd International Scientific Conference of Alkafeel University (Iscku 2021)

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Spectroscopic analysis of coal plasma emission produced by laser ablation

Cited by 4 publications

References 13 publications

Study of Electronic Bands of Diatomic Molecules for the Evaluation of Toxicity of Green Crackers Using LIBS Coupled with Chemometric Method

Study of Electronic Bands of Diatomic Molecules for the Evaluation of Toxicity of Green Crackers Using LIBS Coupled with Chemometric Method

Analysis of Carbon Contents and Heavy Metals in Coal Samples Using Calibration-free LIBS Technique

Emission spectroscopic characterization of a copper plasma by using (LIPS) technique

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