Structure and pyrolysis behaviour of different coals and relevant model substances

Heek, K.H. van; Hodek, W.

doi:10.1016/0016-2361(94)90283-6

Cited by 217 publications

(110 citation statements)

References 9 publications

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“…The use of non-isothermal pyrolysis with associated evolved gas analysis provides a qualitative explanation of the pyrolysis behaviour of coal [6]. TG/FTIR data have been employed to study coal pyrolysis product distributions, decomposition kinetics, 3 functional group composition [7] and as input data in a general model of coal devolatilisation [8].…”

Section: Introductionmentioning

confidence: 99%

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

Arenillas

Rubiera

Pís

1999

Journal of Analytical and Applied Pyrolysis

198

122

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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: Introductionmentioning

confidence: 99%

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

Arenillas

Rubiera

Pís

1999

Journal of Analytical and Applied Pyrolysis

198

122

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“…Degradation of the carbonaceous matrix (peak 2 in Figure 9) starts with the production mainly of CO 2 and H 2 O from the more labile oxygenated functional groups (see Figures 10-11 for the MS and FTIR profiles, respectively). The third peak is due to the structural degradation of SC, with some CO evolution resulting from the break-up of ether-type bonds in PTC, and also from the decomposition of phenols [1], in agreement with the phenolic groups from PFR, as can be seen in Figure 11. The degradation of the carbonaceous structure in this temperature range (500-600 ºC) is also corroborated by the evolution of CH 4 , the rupture of C-C bonds and the formation of methyl radicals.…”

Section: Characterisation Of the Synthetic Coalmentioning

confidence: 49%

“…The rupture of aryl methyl ethers and methylene bridges from the PFR leads to the formation of methane [1,30] and probably some CO and CO 2 .…”

Section: Characterisation Of the Individual Model Compoundsmentioning

confidence: 99%

04/02222 Characterisation of model compounds and a synthetic coal by TG/MS/FTIR to represent the pyrolysis behaviour of coal

2004

Fuel and Energy Abstracts

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Coal pyrolysis is the initial, accompanying reaction of a number of coal conversion processes such as hydrogenation, combustion and gasification. However, because of the inherent complexity of coal composition, it is difficult to describe coal pyrolysis clearly. Temperature-programmed pyrolysis tests were performed in a thermobalance linked to a mass spectrometer and a Fourier transform infrared analyser (TG/MS/FTIR). The thermal behaviour of the synthetic coal (i.e., rate of mass loss and the evolution profiles of gaseous compounds during pyrolysis tests) is very similar to that of the high volatile bituminous coal which was used as a reference material. The great advantage of using SC lies in the fact that its composition and structure can be accurately determined and employed in subsequent applications in basic and mechanistic studies.

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“…The PFR and PTC constitute the carbon matrix [35][36], while PVPI and P4VP represent the most abundant nitrogen functionalities in coal, pyrrolic and pyridinic, respectively [37][38]. The evolution of HCN during pyrolysis was simulated with the incorporation of CYAN to the model coal.…”

Section: Evaluation Of Ms Response Factorsmentioning

confidence: 99%

Thermogravimetric–mass spectrometric study on the evolution of nitrogen compounds during coal devolatilisation

Arenillas

Rubiera

Pevida

et al. 2002

Journal of Analytical and Applied Pyrolysis

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Emissions of nitrogen oxides during coal combustion are a major environmental problem. The chemically bound nitrogen in fuel accounts for up to 80% of total NOx emissions. In this respect, fundamental studies are needed to clarify the mechanisms and to identify the different species that are precursors in the formation of the NOx. Mass spectrometry (MS) has been used for decades as a successful technique in evolved gas analysis. However, MS is normally used to identify typical volatile compounds formed during coal pyrolysis (i.e. H 2 , CH 4 , CO,

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Structure and pyrolysis behaviour of different coals and relevant model substances

Cited by 217 publications

References 9 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

04/02222 Characterisation of model compounds and a synthetic coal by TG/MS/FTIR to represent the pyrolysis behaviour of coal

Thermogravimetric–mass spectrometric study on the evolution of nitrogen compounds during coal devolatilisation

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