Pyrolysis kinetics of refuse-derived fuel

Lin, Kuen Song; Wang, H. Paul; Liu, Shou Heng; Chang, Nan Shan; Huang, Yu Chun; Wang, H. C.

doi:10.1016/s0378-3820(99)00043-0

Cited by 77 publications

(28 citation statements)

References 16 publications

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“…Essentially the oil and solid yields decreased while the gas yield increased with increasing temperature. Similar trends in product yields with increasing pyrolysis temperature have been reported by other researchers as well [15,[34][35][36][37][38]. At 800 °C the gas yield increased to 46.9 wt% from 43.6 wt% at 700 °C as result of cracking of larger molecules in the oil products (Table 3) to increase the yields of CH 4 and C 2 -C 4 in the gas products at this temperature.…”

Section: Effects Of Final Pyrolysis Temperaturesupporting

confidence: 73%

“…The presence of silica and other inorganic materials often contribute to high ash contents of RDF, while other easily carbonized organic materials other than common plastics and cellulose would be responsible for the much higher fixed carbon contents. The thermal degradation behaviours of the RDF, cellulose, mixed waste and simulated RDF samples are depicted in The degradation of cellulosic matter has been reported to take place around the temperature ranges of 200 to 400 °C [11,14] while plastic decomposition was reported to occur around the ranges 425 to 565 °C [10,15]. The mass loss analysis of the TGA results showed that the RDF sample was roughly composed of 13 wt% ash and 83 wt% fuel (organic) material.…”

Section: Rdf Characteristicsmentioning

confidence: 99%

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Products from the high temperature pyrolysis of RDF at slow and rapid heating rates

Efika

Onwudili

Williams

2015

Journal of Analytical and Applied Pyrolysis

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The high-temperature pyrolysis behaviour of a sample of refuse derived fuel (RDF) as a model of municipal solid waste (MSW) was investigated in a horizontal tubular reactor between 700 -900 °C , at varying heating rates, and at an extended vapour residence time.Experiments were designed to evaluate the influence of process conditions on gas yields as well as gas and oil compositions. Pyrolysis of RDF at 800 °C and at rapid heating rate resulted in the gas yield with the highest CV of 24.8 MJ m -3 while pyrolysis to 900 °C at the rapid heating rate generated the highest gas yield but with a lower CV of 21.3 MJ m -3 . A comparison of the effect of heating rates on oil products revealed that the oil from slow pyrolysis, contained higher yields of more oxygenates, alkanes (C8 to C39) and alkenes (C8 to C20), while the oil from rapid pyrolysis contained more aromatics, possibly due to the promotion of Diels-Alder-type reactions. IntroductionThere is a continuously growing need for new and sustainable sources of energy in the world as our populations grow and countries become more developed. There is also an increased demand for renewable sources of energy, resulting in increased interests in the processing of municipal solid waste (MSW) as an energy resource both by biochemical and thermochemical means. Among the thermochemical technologies for MSW conversion, pyrolysis is arguably, the most versatile in relation to the flexibility of obtaining primary products. The application of pyrolysis technology to MSW is quite promising as the energy content of the MSW can be extracted in the form of primary pyrolysis products including gas,

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Section: Effects Of Final Pyrolysis Temperaturesupporting

confidence: 73%

Section: Rdf Characteristicsmentioning

confidence: 99%

Products from the high temperature pyrolysis of RDF at slow and rapid heating rates

Efika

Onwudili

Williams

2015

Journal of Analytical and Applied Pyrolysis

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“…Notwithstanding congener composition values that have also been found in previous studies (Lin et al 1999;Heikkinen et al 2004), significant deviations in composition between the two residues are observed. The main deviations are recorded in the fixed carbon and volatile matter contents.…”

Section: Pyrolysis Of Samplesmentioning

confidence: 51%

A Thermochemical Conversion Study on the Combustion of Residue-Derived Fuels

Skodras

Grammelis

Basinas

et al. 2008

Water Air Soil Pollut: Focus

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Two different waste-derived by-products were examined and compared. Based on the thermogravimetric tests performed, it was proved that their decomposition occurs in two weight loss steps represented by two shoulders in the derivative thermogravimetric curves. The first shoulder is attributed to the devolatilisation of hemicellulose, cellulose and lignin and the second one to the plastic fraction of the waste. Similarities in the degradation behaviour were observed for both wastes, despite of their different origin. Increased plastic fractions resulted in slightly higher conversions and lower pyrolysis rates. Enhanced lignocellulosic fractions led to higher rates during combustion. The lignocellulosic fraction was increased proportionally to the inorganic residue that remained after combustion. A wide variation of weight losses was attained even in refuse-derived fuel (RDF) samples of the same origin, whilst stronger deviations were observed in the decomposition of the plastic fraction. The independent parallel, first-order, reactions model was elaborated for the kinetic analysis of the pyrolysis results. The thermal degradation of the RDF samples was modelled assuming four parallel reactions corresponding to the devolatilisation of cellulose, hemicellulose, lignin and plastics. Increased activation energies were calculated for the plastics fraction, whilst lignin presented the lowest contribution in the pyrolysis of the samples. Generally, both RDF samples presented similar kinetic constants despite their heterogeneity.

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“…TGA was frequently employed in the kinetic modeling of the thermal degradation of biomass-type wastes. [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] There is a vast literature on the kinetic evaluation methods of thermal analysis from its beginnings in the fifties to the present. A general survey is outside the scope of the present work.…”

Section: Introductionmentioning

confidence: 99%

Thermal Decomposition of Biomass Wastes. A Kinetic Study

Becidan

Várhegyi

Hustad

et al. 2007

Ind. Eng. Chem. Res.

114

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ABSTRACT. Wastes from brewery, industrial coffee roasting and fiberboard furniture were investigated.Thermogravimetric experiments were carried out with different types of temperature programs. Three models were proposed describing equally well the behavior of the samples. One of the models consisted of three partial reactions with distributed activation energies (DAEM). In this case 12 parameters were sufficient to describe the behavior of a sample in the whole range of observations. The other two models were mathematically simpler, but contained higher numbers of adjustable parameters. The reliability of the models was tested in three ways: (i) the models provided good fit for all experiments; (ii) the evaluation of a narrower subset of the experiments resulted in approximately the same parameters as the evaluation of the whole series of experiments; (iii) the models allowed accurate extrapolations to higher heating rates.

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Pyrolysis kinetics of refuse-derived fuel

Cited by 77 publications

References 16 publications

Products from the high temperature pyrolysis of RDF at slow and rapid heating rates

Products from the high temperature pyrolysis of RDF at slow and rapid heating rates

A Thermochemical Conversion Study on the Combustion of Residue-Derived Fuels

Thermal Decomposition of Biomass Wastes. A Kinetic Study

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