Thermal behaviour during the pyrolysis of low rank perhydrous coals

Arenillas, A.; Rubiera, F.; Pís, J.J.; Cuesta, Marcelino; Iglesias, Marı́a José; Jiménez, Amalia; Suárez‐Ruíz, Isabel

doi:10.1016/s0165-2370(03)00031-7

Cited by 195 publications

(115 citation statements)

References 26 publications

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“…The highest concentration emission of CH4 occurred at about 380 °C. As previously noted (Hodek et al 1991;Arenillas et al 2003), the CH4 emission at relatively lower temperatures was most likely released from the C-C bond cleavage in aliphatic chains, whereas the CH4 emission at higher temperature zones was mainly produced from the cracking of a weakly bonded methoxyl-O-CH3 group as well as the break of having higher bond energy of methylene group -CH2- (Ferdous et al 2001). From the perspective of biomass components pyrolysis, the CH4 was mainly released from the pyrolysis of lignin because it contains more methoxyl-O-CH3 chemical groups than hemicelluloses and celluloses (Liu et al 2008).…”

Section: Influence Of Process Parameters On the Release Of Bio-syngassupporting

confidence: 54%

“…When the pyrolysis was carried out in various gas flows, especially for the cases of 60 and 90 mL/min (Fig. 6(d)), the emission of H2 arrived at the second highest concentration peak at temperatures up to about 800 °C; this peak represented the thermal degradation of heterocyclic compounds or the condensation of aromatic and hydroaromatic structures (Arenillas et al 2003).…”

Section: Influence Of Process Parameters On the Release Of Bio-syngasmentioning

confidence: 99%

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Assessing the Effects of Different Process Parameters on the Pyrolysis Behaviors and Thermal Dynamics of Corncob Fractions

Yao¹,

Xu²,

Liang³

2017

BioResources

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The influence of heating rate, gas flow, and biomass particle size on the pyrolysis and thermal dynamics of corncobs (CC) was investigated experimentally using the quantitative method of thermogravimetric analysis (TGA) coupled with mass spectrometry (MS), and the obtained results were compared in depth. For the examined heating rates of 5, 10, and 20 °C/min, the CC pyrolysis at higher heating rates resulted in a more complete decomposition. The initial pyrolysis temperature decreased when gas flow was increased from 30 to 90 mL/min, whereas the weight loss increased. Particle sizes (d ≤ 74 μm, 74 μm < d ≤ 154 μm, 154 μm < d ≤ 280 μm, and 280 μm < d ≤ 450 μm) had pronounced effects on the thermal decomposition and bio-syngas compounds (CO, CO2, CH4, and H2) distribution. The emission intensities of most the gaseous products increased at the elevated heating rate, while they decreased with increasing gas flow. In sum, the pyrolysis of CC particles of 154 μm < d ≤ 280 μm under 20 °C/min and in a gas flow of 30 to 60 mL/min was the most appropriate for bio-syngas production in industrial applications.

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Section: Influence Of Process Parameters On the Release Of Bio-syngassupporting

confidence: 54%

Section: Influence Of Process Parameters On the Release Of Bio-syngasmentioning

confidence: 99%

Assessing the Effects of Different Process Parameters on the Pyrolysis Behaviors and Thermal Dynamics of Corncob Fractions

Yao¹,

Xu²,

Liang³

2017

BioResources

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“…PANI and composite PANI-FA(0.02) and PANI-FA(0.1) exhibit similar pattern, with a small variation in degradation temperature, while thermograms of PANI-FA(0.5) and PANI-FA (1.0) show similar pattern with FA. In the first stage, 3-4% weight loss at temperature up to 125˚C is associated with the loss of water molecules [26]. In the second stage corresponding to temperature zone 125º -400˚C, the weight loss (about 9-12%) is due to the evolution of thermally labile compounds and the breaking of aliphatic structures with low dissociation bonds in the carbonaceous matrix of FA.…”

Section: Tga Propertiesmentioning

confidence: 99%

Spectroscopic, Kinetic Studies of Polyaniline-Flyash Composite

Khan¹,

Khare²,

Baruah³

et al. 2011

ACES

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Polyaniline-fly ash (PANI-FA) composites were prepared by oxidative polymerization of aniline with fly ash in presence of ammonium persulphate (APS). The PANI-FA composites were prepared with different concentrations of fly ash to aniline ratio. The composites, so prepared, were characterized by UV-vis spectroscopy, Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM) and thermogravimetric analysis (TGA). The thermal stability was studied by TGA and total weight loss of PANI, FA and PANI-FA composites having FA composition of 0.02%, 0.1%, 0.5% and 1.0% were found to be 82%, 39%, 67% 65%, 62% and 61%, respectively. The UV-vis spectroscopy of the PANI-FA polymeric composite shows absorption maxima at 315 and 350 nm (due to π-π* transition of the benzenoid rings), and 578-712 nm (due to charge transfer excitations of the quinoid structure), which are characteristic of emeraldine base. FTIR spectra of the PANI-FA composite is similar to that of pure polyaniline (PANI) but with the bands for C = N, C = C and C-N shifted to lower wave numbers, i.e., 1585, 1494, 1327 and 1113 cm −1 due to strong interaction of Fe 2 O 3 and PANI matrix. SEM shows the complexation of metal oxide with emaraldine base of PANI, significantly changing the aggregate state of polymeric molecular chain.

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“…CG with its characteristic low volatile and high ash content is difficult to be on fire. [12][13][14][15] Circulated bed particles in circulating fluidized bed (CFB) furnace form a dense zone and keep at a high temperature. Therefore, CG can be ignited in time when in co-combustion with CBM in a CFB.…”

Section: Introductionmentioning

confidence: 99%

Co-utilization of two coal mine residues

Chen

Yang

et al. 2015

Advances in Mechanical Engineering

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In this study, the experiments were carried out in a circulating fluidized bed with different coal bed methane and coal gangue mixing ratios. The results show that bed temperature distribution becomes well-proportioned and the combustion efficiency increases when coal bed methane was introduced. The NO emission increases along with the excess air coefficient rise. The SO 2 emission reduces first and then increases with the rising bed temperature and there is an optimum temperature corresponding to the lowest SO 2 emission. At the same time, the effects of the bed temperature and excess air coefficient on pollutant emissions are more obvious when coal bed methane and coal gangue mixing ratio is less than 0.3. In the experiments, the best operation conditions have been found at coal bed methane and coal gangue mixing ratio of 0.2 and excess air coefficient of less than 1.3. The results show that the co-combustion of coal bed methane and coal gangue in circulating fluidized bed is feasible and provides some references for the combustion optimization.

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Thermal behaviour during the pyrolysis of low rank perhydrous coals

Cited by 195 publications

References 26 publications

Assessing the Effects of Different Process Parameters on the Pyrolysis Behaviors and Thermal Dynamics of Corncob Fractions

Assessing the Effects of Different Process Parameters on the Pyrolysis Behaviors and Thermal Dynamics of Corncob Fractions

Spectroscopic, Kinetic Studies of Polyaniline-Flyash Composite

Co-utilization of two coal mine residues

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