Study of the potential valorisation of heavy metal contaminated biomass via phytoremediation by fast pyrolysis: Part I. Influence of temperature, biomass species and solid heat carrier on the behaviour of heavy metals

C. Lievens, J. Yperman*, J. Vangronsveld, R. Carleer

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

95 Citations (Scopus)

Abstract

Presently, little or no information of implementing fast pyrolysis for looking into the potential valorisation of heavy metal contaminated biomass is available. Fast pyrolysis of heavy metal contaminated biomass (birch and sunflower), containing high amounts of Cd, Cu, Pb and Zn, resulting from phytoremediation, is investigated. The effect of the pyrolysis temperature (623, 673, 773 and 873 K) and the type of solid heat carrier (sand and fumed silica) on the distribution of the heavy metals in birch and sunflower pyrolysis fractions are studied. The goal of the set-up is "concentrating" heavy metals in the ash/char fraction after thermal treatment, preventing them to be released in the condensable and/or volatile fractions. The knowledge of the behaviour of heavy metals affects directly future applications and valorisation of the pyrolysis products and thus contaminated biomass. They are indispensable for making and selecting the proper thermal conditions for their maximum recovery. In view of the future valorisation of these biomasses, the amounts of the pyrolysis fractions and the calorific values of the obtained liquid pyrolysis products, as a function of the pyrolysis temperature, are determined.

Original languageEnglish
Pages (from-to)1894-1905
Number of pages12
JournalFuel
Volume87
Issue number10-11
Early online date21 Nov 2007
DOIs
Publication statusPublished - 1 Aug 2008
Externally publishedYes

Keywords

  • Biomass
  • Fast pyrolysis
  • Heavy metals
  • Phytoremediation
  • ITC-ISI-JOURNAL-ARTICLE

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