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The role of metal salts in the pyrolysis of biomass

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  • Williams, Paul T.
  • Horne, Patrick A.

Abstract

Biomass in the form of cellulose was pyrolysed in a thermogravimetric analyser and static batch reactor in the presence of several metal salts and increasing concentrations of the metal salt. The thermogravimetric analyser was used to study the devolatilisation of the cellulose and formation of char and to derive the kinetic parameters, pre-exponential factor and activation energy in the presence of the metal salts. The static batch reactor enabled the determination of product yield of the char, gas and liquid and the composition of the gas in relation to the type of metal salt and concentration. The results showed that even low concentrations of metal salt significantly affect the thermal degradation of cellulose and the production of residual char. Increasing the metal salt concentration resulted in a lowering of the temperature where the main pyrolysis occurred and an increase in the number of distinct areas of weight loss. The static batch reactor results showed that the added metal salts increased the concentration of H2 in all cases, however, CuSO4, NaCl and FeSO4 produced lower concentrations of hydrocarbons, CO and CO2 compared to untreated cellulose. The mechanism of the effect of added metal salts is discussed.

Suggested Citation

  • Williams, Paul T. & Horne, Patrick A., 1994. "The role of metal salts in the pyrolysis of biomass," Renewable Energy, Elsevier, vol. 4(1), pages 1-13.
    • Handle: RePEc:eee:renene:v:4:y:1994:i:1:p:1-13
    DOI: 10.1016/0960-1481(94)90058-2
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    Cited by:

    1. Radoslaw Slezak & Hilal Unyay & Szymon Szufa & Stanislaw Ledakowicz, 2023. "An Extensive Review and Comparison of Modern Biomass Reactors Torrefaction vs. Biomass Pyrolizers—Part 2," Energies, MDPI, vol. 16(5), pages 1-25, February.
    2. Beatrice Vincenti & Enrico Paris & Monica Carnevale & Adriano Palma & Ettore Guerriero & Domenico Borello & Valerio Paolini & Francesco Gallucci, 2022. "Saccharides as Particulate Matter Tracers of Biomass Burning: A Review," IJERPH, MDPI, vol. 19(7), pages 1-20, April.
    3. Pan Gao & Lu Xue & Qiang Lu & Changqing Dong, 2015. "Effects of Alkali and Alkaline Earth Metals on N-Containing Species Release during Rice Straw Pyrolysis," Energies, MDPI, vol. 8(11), pages 1-12, November.
    4. Kratzeisen, M. & Müller, J., 2010. "Influence of phosphorus content of coconut oil on deposit and performance of plant oil pressure stoves," Renewable Energy, Elsevier, vol. 35(11), pages 2585-2589.
    5. Kan, Tao & Strezov, Vladimir & Evans, Tim J., 2016. "Lignocellulosic biomass pyrolysis: A review of product properties and effects of pyrolysis parameters," Renewable and Sustainable Energy Reviews, Elsevier, vol. 57(C), pages 1126-1140.
    6. Williams, Paul T & Nugranad, Nittaya, 2000. "Comparison of products from the pyrolysis and catalytic pyrolysis of rice husks," Energy, Elsevier, vol. 25(6), pages 493-513.

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