Experimental and theoretical study of the ignition and smoldering of wood including convective effects

Bilbao, Rafael; Mastral, J.F.; Aldea, M.E.; Ceamanos, J.; Betrán, Mónica; Lana, J.A.

doi:10.1016/s0010-2180(01)00251-6

Cited by 77 publications

(48 citation statements)

References 17 publications

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“…Bilbao et al [8] experimentally observed a glowing (smoldering) ignition temperature for (P. pinaster) pine wood. They correlated the experimental data as T glowing ¼ 300 þ 6 _ q 00 i for _ q 00 i < 40 kW=m 2 and T glowing = 525 for _ q 00 i > 40 kW=m 2 , where T glowing is in°C, and _ q 00 i is in kW/m 2 .…”

Section: Theoretical and Experimental Glowing Ignition Resultsmentioning

confidence: 99%

“…They presented a model for coal particle combustion and concluded that to obtain the maximum combustion rate, a coal particle must be in an optimum size. Bilbao et al [8] examined the ignition and smoldering of Pinus pinaster wood samples. Experimentally, they suggested that under low heat flux conditions (<40 kW/ m 2 ), the smoldering temperature was approximately the same as the critical temperature for piloted ignition, which increases proportionally with the heat flux.…”

Section: Introductionmentioning

confidence: 99%

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Glowing ignition of wood: the onset of surface combustion

Boonmee

Quintiere

2005

Proceedings of the Combustion Institute

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Section: Theoretical and Experimental Glowing Ignition Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Glowing ignition of wood: the onset of surface combustion

Boonmee

Quintiere

2005

Proceedings of the Combustion Institute

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“…In the Waterloo plants, liquid yields (organics plus water) ranging from 60 to 85 wt % on moisture free feedstock basis were reported, depending on the biomass type and the operating conditions. A selection of later publications concerned with fluidized bed pyrolysis are those by Agblevor et al, 87 Horne and Williams, 88 Peacocke et al, 20,89,90 Hague, 91 Bilbao et al, 92 Luo et al, 93 and Olazar et al 94 Regarding the trends, the results obtained are in good agreement with those reported in the original work of Scott et al However, in later investigations, the highest liquid yields of Scott and co-workers (>80 wt %) could never be reproduced anymore. In the following subsections, the reported effects of the operating conditions are discussed.…”

Section: Continuous Laboratory Experiments In Fluidmentioning

confidence: 99%

Biomass Pyrolysis in a Fluidized Bed Reactor. Part 1: Literature Review and Model Simulations

Kersten¹,

Wang²,

Prins³

et al. 2005

Ind. Eng. Chem. Res.

203

147

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The literature on biomass pyrolysis regarding kinetics, models (single particle and reactor), and experimental results is reviewed from an engineering point of view. Predictions of existing single particle models derived from a detailed description of the transport phenomena and literature data on measured intrinsic chemical kinetics are presented. The main conclusions from the literature and modeling studies can be summarized as follows: (1) the available knowledge on kinetics and transport phenomena has not been integrated properly for reactor design, (2) complex two-dimensional single particle models do not provide more accurate, or otherwise better, information for engineering calculations than do the simple one-dimensional models, and (3) single particle models predict (for all available kinetics) that the influence of the particle size on the liquid yield is limited. This effect can be explained with the effective pyrolysis temperature, a parameter that represents the particle's average temperature at which the conversion is essentially taking place.

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“…Since the average residence time of the aerosol is longer (reduced influence of fresh local combustion sources) and therefore the aerosol is more aged in this period, the lower amount of the phenolic compounds relative to that of levoglucosan indicates that the former compounds probably participate in photochemical reactions. It should be noted that both levoglucosan evolution from the cellulose part (Mészáros et al, 2004) and that of methoxyphenols from the lignin component of biomass (Jakab et al, 1997) occur in the temperature range of smoldering which is between 300 and 500 • C (Bilbao et al, 2001). If we assume that the ratio of the emission factors of levoglucosan and the methoxyphenols is constant between 300 and 500 • C, no drastic changes in the product ratios might be expected.…”

Section: Lignin Pyrolysis Productsmentioning

confidence: 99%

Diel and seasonal variations in the chemical composition of biomass burning aerosol

Hoffer

Gelencsér²,

Blazsó

et al. 2006

Atmos. Chem. Phys.

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Abstract. Fine aerosol particles were collected separately during daytime and nighttime at a tropical pasture site in Rondônia, Brazil, during the burning and dry-to-wet transition period in 2002. Total carbon (TC) and water-soluble organic carbon (WSOC) were measured by evolved gas analysis (EGA). Based on the thermochemical properties of the fine aerosol, the relative amounts of the volatile and refractory compounds were estimated. It was found that the thermally refractory (possibly higher molecular weight) compounds dominated the TC composition. Their contribution to TC was higher in the daytime than in the nighttime samples. The relative share of WSOC also showed a statistically significant diel variation as did its refractory fraction. Anhydrosugars and phenolic acids were determined by GC-MS and their diel variation was studied. Based on the decrease of their relative concentrations between the biomass burning and transition periods and their distinctly different diel variations, we suggest that the phenolic acids may undergo chemical transformations in the aerosol phase, possibly towards more refractory compounds (humic-like substances, HULIS), as has been suggested previously. These conclusions are supported by the results of the thermally assisted hydrolysis and methylation gas chromatography-mass spectrometry of the same filter samples.

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Experimental and theoretical study of the ignition and smoldering of wood including convective effects

Cited by 77 publications

References 17 publications

Glowing ignition of wood: the onset of surface combustion

Glowing ignition of wood: the onset of surface combustion

Biomass Pyrolysis in a Fluidized Bed Reactor. Part 1: Literature Review and Model Simulations

Diel and seasonal variations in the chemical composition of biomass burning aerosol

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