Effects of particle size, heating rate and pressure on measurement of pyrolysis kinetics by thermogravimetric analysis

Seebauer, Veronika; Petek, Josef; Staudinger, Gernot

doi:10.1016/s0016-2361(97)00106-3

Cited by 129 publications

(56 citation statements)

References 12 publications

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“…Particle size is known to influence pyrolysis products yield. If the particle size is sufficiently small it can be heated uniformly, as is consistent with earlier studies [15] . However, in this work it was observed that particle size had no significant influence on the bio-oil.…”

Section: Discussionsupporting

confidence: 89%

Bio-oils from Pyrolysis of Oil Palm Empty Fruit Bunches

Sukiran¹

2009

American Journal of Applied Sciences

100

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Problem Statement: The palm oil industry generates an abundance of oil palm biomass such as the mesocarp fibre, shell, empty fruit bunch (EFB), frond, trunk and palm oil mill effluent (POME). For 80 million tonnes of fresh fruit bunch (FFB) processed last year, the amount of oil palm biomass was more than 25 million tones. The objectives of this study were to: (i) Determine the effect of various pyrolysis parameters on product yields and (ii) Characterise liquid product obtained under different condition. Approach: In this study, pyrolysis of oil palm Empty Fruit Bunches (EFB) was investigated using quartz fluidized fixed bed reactor. The effects of pyrolysis temperatures, particle sizes and heating rates on the yield of the products were investigated. The temperature of pyrolysis and heating rate were varied in the range 300-700 °C and 10-100 °C min 1 respectively. The particle size was varied in the range of <90, 91-106, 107-125 and 126-250 µm. The elemental analysis and calorific value of the bio-oil were determined. The chemical composition of the oil was investigated using chromatographic and spectroscopic techniques. Results: Under the experimental conditions, the maximum bio-oil yield was 42.28% obtained at 500 ºC, with a heating rate of 100 ºC min

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Section: Discussionsupporting

confidence: 89%

Bio-oils from Pyrolysis of Oil Palm Empty Fruit Bunches

Sukiran¹

2009

American Journal of Applied Sciences

100

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“…They delineated two temperature ranges: one between 833 K and 953 K where the effect of pressure on devolatilization is insignificant, and one between 833 K and 953 K where increased pressure significantly reduces the devolatilization rate for Chinese bituminous and anthracite coals. Seebauer et al [142] observed a similar trend on bituminous coal at pressure between 0.1 MPa and 4 MPa. Collot et al [37] obtained the same trend on pyrolysis of Daw Mill coal at pressures ranging from 1 bar to 25 bar and temperatures of 1123-1273 K in a helium environment using a hot-rod reactor.…”

Section: Effect Of Pressure On Pyrolsys/devolatilizationmentioning

confidence: 64%

“…Like total volatile yield, the effect of pressure on tar yield is less pronounced at higher pressures. Biomass reveals similar behavior; which is depicted by [142] on pyrolysis of eucalyptus wood waste.…”

Section: Effect Of Pressure On Pyrolsys/devolatilizationmentioning

confidence: 70%

A Review of Thermal Co-Conversion of Coal and Biomass/Waste

2014

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Abstract:Biomass is relatively cleaner than coal and is the only renewable carbon resource that can be directly converted into fuel. Biomass can significantly contribute to the world's energy needs if harnessed sustainably. However, there are also problems associated with the thermal conversion of biomass. This paper investigates and discusses issues associated with the thermal conversion of coal and biomass as a blend. Most notable topics reviewed are slagging and fouling caused by the relatively reactive alkali and alkaline earth compounds (K 2 O, Na 2 O and CaO) found in biomass ash. The alkali and alkaline earth metals (AAEM) present and dispersed in biomass fuels induce catalytic activity during co-conversion with coal. The catalytic activity is most noticeable when blended with high rank coals. The synergy during co-conversion is still controversial although it has been theorized that biomass acts like a hydrogen donor in liquefaction. Published literature also shows that coal and biomass exhibit different mechanisms, depending on the operating conditions, for the formation of nitrogen (N) and sulfur species. Utilization aspects of fly ash from blending coal and biomass are discussed. Recommendations are made on pretreatment options to increase the energy density of biomass fuels through pelletization, torrefaction and flash pyrolysis to reduce transportation costs.

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“…A review of the literature concerning the reactions of PC in high-temperature environments shows that numerous studies have been performed and many important results have been extensively reviewed by Beer, 16 Williams et al, 17 Wall et al, 18 and Yu et al 13 For example, Wall et al, 18 reported that after the reactions of coal particles, three different char particles could be identified in accordance with the particle internal structure, such as porosity and wall thickness. The study of Seebauer et al 19 suggested that the use of smaller particles led to a higher extent of secondary reactions, lower tar yields, and higher yields of the gases produced by cracking reactions. However, it should be emphasized that most attention in the aforementioned studies was paid to the combustion of coal particles and its emissions, 16,17 the formation of unburned char particles, 3,18 and the effect of feed particle size of coal on the pyrolysis process.…”

Section: Technical Papermentioning

confidence: 99%

“…However, it should be emphasized that most attention in the aforementioned studies was paid to the combustion of coal particles and its emissions, 16,17 the formation of unburned char particles, 3,18 and the effect of feed particle size of coal on the pyrolysis process. 3,13,19 Relatively little research has been focused on the formation and thermal behavior of tiny aerosol particles or on the compositions contained in these aerosols stemming from the pyrolysis of PC.…”

Section: Technical Papermentioning

confidence: 99%