The Influence of Temperature and Heating Rate on the Slow Pyrolysis of Biomass

Paul T. Williams, Serpil Guran

Research output: Contribution to journalArticle

368 Citations (Scopus)

Abstract

The slow pyrolysis of biomass in the form of pine wood was investigated in a static batch reactor at pyrolysis temperatures from 300 to 720°C and heating rates from 5 to 80 K mim-1. The compositions and properties of the derived gases, pyrolytic oils and solid char were determined in relation to pyrolysis temperatures and heating rates. In addition, the wood and the major components of the wood - cellulose, hemicellulose and lignin -were pyrolysed in a thermogravimetric analyser (TGA) under the same experimental conditions as in the static batch reactor. The static batch reactor results showed that as the pyrolysis temperature was increased, the percentage mass of solid char decreased, while gas and oil products increased. There was a small effect of heating rate on product yield. The lower temperature regime of decomposition of wood showed that mainly H2O, CO2 and CO were evolved and at the higher temperature regime, the main decomposition products were oil, H2O, H2, hydrocarbon gases and lower concentrations of CO and CO2. Fourier transformation infra-red spectroscopy and elemental analysis of the oils showed they were highly oxygenated. The TGA results for wood showed two main regimes of weight loss, the lower temperature regime could be correlated with the decomposition of hemicellulose and the initial stages of cellulose decomposition whilst the upper temperature regime correlated mainly with the later stages of cellulose decomposition. Lignin thermal decomposition occurred throughout the temperature range of pyrolysis.

Original languageEnglish (US)
Pages (from-to)233-250
Number of pages18
JournalRenewable Energy
Volume7
Issue number3
DOIs
StatePublished - Jan 1 1996

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Heating rate
Biomass
Pyrolysis
Wood
Decomposition
Batch reactors
Cellulose
Temperature
Lignin
Gas oils
Chemical analysis
Gases
Infrared spectroscopy
Hydrocarbons
Oils

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment

Cite this

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abstract = "The slow pyrolysis of biomass in the form of pine wood was investigated in a static batch reactor at pyrolysis temperatures from 300 to 720°C and heating rates from 5 to 80 K mim-1. The compositions and properties of the derived gases, pyrolytic oils and solid char were determined in relation to pyrolysis temperatures and heating rates. In addition, the wood and the major components of the wood - cellulose, hemicellulose and lignin -were pyrolysed in a thermogravimetric analyser (TGA) under the same experimental conditions as in the static batch reactor. The static batch reactor results showed that as the pyrolysis temperature was increased, the percentage mass of solid char decreased, while gas and oil products increased. There was a small effect of heating rate on product yield. The lower temperature regime of decomposition of wood showed that mainly H2O, CO2 and CO were evolved and at the higher temperature regime, the main decomposition products were oil, H2O, H2, hydrocarbon gases and lower concentrations of CO and CO2. Fourier transformation infra-red spectroscopy and elemental analysis of the oils showed they were highly oxygenated. The TGA results for wood showed two main regimes of weight loss, the lower temperature regime could be correlated with the decomposition of hemicellulose and the initial stages of cellulose decomposition whilst the upper temperature regime correlated mainly with the later stages of cellulose decomposition. Lignin thermal decomposition occurred throughout the temperature range of pyrolysis.",
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The Influence of Temperature and Heating Rate on the Slow Pyrolysis of Biomass. / Williams, Paul T.; Guran, Serpil.

In: Renewable Energy, Vol. 7, No. 3, 01.01.1996, p. 233-250.

Research output: Contribution to journalArticle

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