Coal characterization using pyrolysis-FTIR

Ibarra, José V.; Moliner, R.

doi:10.1016/0165-2370(91)80071-f

Cited by 55 publications

(19 citation statements)

References 11 publications

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“…A similar evolution was observed by other authors during pyrolysis of a bituminous coal [23]. CH 4 in the pyrolysis of bituminous coals has been proposed to originate mainly from hydroaromatic and aryl methyl groups [24].…”

Section: Temperature-programmed Pyrolysissupporting

confidence: 85%

Simultaneous thermogravimetric–mass spectrometric study on the pyrolysis behaviour of different rank coals

Arenillas

Rubiera

Pís

1999

Journal of Analytical and Applied Pyrolysis

195

121

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Simultaneous Thermogravimetry/Mass Spectrometry (TG/MS) was used to study the pyrolysis behaviour of an anthracite and three bituminous coals of different volatile matter content. This system was optimised by using calcium oxalate as a reference for calibration. A normalisation method that permitted a semiquantitative comparison between the volatile species of the coals was also developed. The instantaneous evolution of the volatile compounds was studied by means of temperature-programmed pyrolysis experiments. The peaks varied in shape, temperature and size and showed a marked dependence on coal rank. This can be attributed to the varying amounts of the different functional groups in the coals studied. Special attention was paid to the nitric oxide released during pyrolysis together with its precursor species.

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Section: Temperature-programmed Pyrolysissupporting

confidence: 85%

Simultaneous thermogravimetric–mass spectrometric study on the pyrolysis behaviour of different rank coals

Arenillas

Rubiera

Pís

1999

Journal of Analytical and Applied Pyrolysis

195

121

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“…Aromatic compounds in these aerosols get special attention due to their great potential carcinogenic, mutagenic and genotoxic effects on human health (Lighty et al, 2000). Many researchers have focused on the emission characteristics of both the particulate phase and the gas phase from coal combustion and pyrolysis using a variety of conventional scientific instruments such as GC/MS (Greenwood et al, 1993;Olivella et al, 2002;Chen et al, 2005), HPLC (Ledesma et al, 2000) and FTIR (Ibarra and Moliner, 1991;Baxter et al, 1993;Arenillas et al, 2004) etc. All of these methods involve the isolation of particles on filters with subsequent analysis performed in the laboratory.…”

Section: Introductionmentioning

confidence: 99%

Real-time analysis of soot emissions from bituminous coal pyrolysis and combustion with a vacuum ultraviolet photoionization aerosol time-of-flight mass spectrometer

Gao

Zhang²,

Meng³

et al. 2009

Science of The Total Environment

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“…The fragments abstract hydrogen from the hydroaromatics or aliphatics, thus increasing the concentration of aromatic hydrogen [3]. These fragments will be released as tar if they are small enough to vaporise and be transported out of the char particle.…”

Section: Introductionmentioning

confidence: 99%

A comparison of different methods for predicting coal devolatilisation kinetics

Arenillas

Rubiera

Pevida

et al. 2001

Journal of Analytical and Applied Pyrolysis

124

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Knowledge of the coal devolatilisation rate is of great importance because it exerts a marked effect on the overall combustion behaviour. Different approaches can be used to obtain the kinetics of the complex devolatilisation process. The simplest are empirical and employ global kinetics, where the Arrhenius expression is used to correlate rates of mass loss with temperature. In this study a high volatile bituminous coal was devolatilised at four different heating rates in a thermogravimetric analyser (TG) linked to a mass spectrometer (MS). As a first approach, the Arrhenius kinetic parameters (k and A) were calculated from the experimental results, assuming a single step process.Another approach is the distributed-activation energy model, which is more complex due to the assumption that devolatilisation occurs through several first-order reactions, which occur simultaneously. Recent advances in the understanding of coal structure have led to more fundamental approaches for modelling devolatilisation behaviour, such as network models. These are based on a physico-chemical description of coal structure.In the present study the FG-DVC (Functional Group-Depolymerisation, Vaporisation and Crosslinking) computer code was used as the network model and the FG-DVC predicted evolution of volatile compounds was compared with the experimental results.In addition, the predicted rate of mass loss from the FG-DVC model was used to obtain a third devolatilisation kinetic approach. The three methods were compared and discussed, with the experimental results as a reference.

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Coal characterization using pyrolysis-FTIR

Cited by 55 publications

References 11 publications

Simultaneous thermogravimetric–mass spectrometric study on the pyrolysis behaviour of different rank coals

Simultaneous thermogravimetric–mass spectrometric study on the pyrolysis behaviour of different rank coals

Real-time analysis of soot emissions from bituminous coal pyrolysis and combustion with a vacuum ultraviolet photoionization aerosol time-of-flight mass spectrometer

A comparison of different methods for predicting coal devolatilisation kinetics

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