A comparative study on pyrolysis characteristics of bituminous coal and low-rank coal using thermogravimetric analysis (TGA)

Dwivedi, Krishna Kant; Shrivastav, Prabhansu; Karmakar, Malay; Pramanick, Achintya Kumar; Chatterjee, Pradip K.

doi:10.1080/19392699.2019.1566130

Cited by 21 publications

(4 citation statements)

References 10 publications

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“…After the tests were completed, the Ag metal remained in the environment in vivo. These ndings are consistent with published TGA-DTA measurements in the literature 40 .…”

Section: Tga-dta Analysis Of Ag(i)-nhc Complexessupporting

confidence: 93%

Characterizations of the new type symmetrically ligands and their Ag(I)-NHC complexes, and their Antimicrobial activity measurements

Turkyılmaz,

Donmez

2024

Preprint

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A new N,N'-disubstitute benzimidazolium ligand and its Ag(I)-NHC complex have been synthesized", along with its symmetric N,N'-disubstitute benzimidazolium derivative of N-Heterocyclic carbene ligands. It was possible to make alkyl bromides or both by N-alkylating 5,6-methyl-1H-benzo[d]imidazole with fluor or non-fluor benzyl alkyl halides. In situ deprotonation of compounds with Ag2O and a catalyzed reaction with KPF6 were used to speed up the synthesis of the Ag(I)-NHC complex. The structural properties of all molecules were elucidated by NMR spectroscopy, PXRD, FTIR, elemental and ICP analysis. The structure of Ag(I)-NHC complexes was identified by analyzing powder PXRD diffraction pattern. According to the analysis, a PF6− anion and two NHC ligands are coordinated with an Ag+ ion in a linear geometry in each fluorinated benzyl complex. The antimicrobial activities of the compounds against Gram-positive, Gram-negative bacteria and fungi showed that the minimum inhibitory concentration value is 0.25 µg/mL. Ag + ions bound to ionic ligands increased the antimicrobial effects of these compounds.

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“…After the tests were completed, the Ag metal remained in the environment in vivo. These ndings are consistent with published TGA-DTA measurements in the literature 40 .…”

Section: Tga-dta Analysis Of Ag(i)-nhc Complexessupporting

confidence: 93%

Characterizations of the new type symmetrically ligands and their Ag(I)-NHC complexes, and their Antimicrobial activity measurements

Turkyılmaz,

Donmez

2024

Preprint

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“…By offline or online observation of morphology and structure of coal-based materials, previous studies have observed that their carbon ordering [31], expansion [32], and permeability during coking are mutable [33], with different degrees of variability for various coal types. It was further revealed by thermogravimetric analysis that the thermal stability of metaplast generated from different coals differed substantially [34], which combined with mass spectrometry uncovered that the aliphatic content endowed in the coal appeared to show a positive correlation with the persistence of the metaplast presence [35][36]. More in-depth research has shown that plentiful aliphatic structures are sequestered in vitrinite [37], hence the content of vitrinite is presumed to be the dominant factor in the modification of coke quality [38].…”

Section: Introductionmentioning

confidence: 99%

High-temperature rheological behavior and non-isothermal pyrolysis mechanism of macerals separated from different coals

Kuang

Jiang

et al. 2023

Energy

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“…K. K. Dwivedi et al studied the kinetics and thermal degradation behavior of bituminous and low-rank coals at four different heating rates (10, 20, 30, 40 K/min) in a nitrogen atmosphere. They reported the feasibility of co-combustion of the low-rank coal with the bituminous coal (Dwivedi et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Pyrolysis of low‐rank coal: Thermo‐kinetic analysis and product characterization

Sabat

Gouda

Panda

2022

Environmental Quality Mgmt

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Pyrolysis, the primary process accompanying the thermal degradation of coal, is complicated, and understanding this process requires kinetic analysis followed by product characterization. In this context, the present work involves the study of kinetics and thermodynamics of low‐rank Indian coal from thermogravimetric analysis data followed by batch pyrolysis and subsequent analysis of the liquid products. The thermal degradation of the coal sample has been carried out using a thermogravimetric analyzer from ambient temperature to 1350 K at five different heating rates (5, 10, 15, 20, and 25⁰C/min) under N2 atmosphere. The kinetic triplets (E, A, and n) are evaluated using the order‐based model‐fitting method. The result of this work shows that coal pyrolysis satisfies the first‐order kinetics mechanism with an average activation energy of 62.141 kJ/mol and a pre‐exponential factor of 123.835 min–1. Thermodynamic parameters such as average enthalpy change (ΔH), entropy change (ΔS), and free energy change (ΔG) of coal pyrolysis are calculated to be 56.1716 kJ/mol, –225.524 kJ/mol/s, and 1.6212 × 105 kJ/mol, respectively. A Batch pyrolysis study of coal was carried out in a semi‐batch reactor at different temperatures with an optimum oil yield of 18.94 wt% at 450°C. The chemical composition of pyrolytic oil was investigated by the FTIR and GC‐MS analysis confirmed the presence of D‐Limonene as the major constituent in the coal pyrolytic oil.

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A comparative study on pyrolysis characteristics of bituminous coal and low-rank coal using thermogravimetric analysis (TGA)

Cited by 21 publications

References 10 publications

Characterizations of the new type symmetrically ligands and their Ag(I)-NHC complexes, and their Antimicrobial activity measurements

Characterizations of the new type symmetrically ligands and their Ag(I)-NHC complexes, and their Antimicrobial activity measurements

High-temperature rheological behavior and non-isothermal pyrolysis mechanism of macerals separated from different coals

Pyrolysis of low‐rank coal: Thermo‐kinetic analysis and product characterization

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