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Combined effects of torrefaction and pelletization parameters on the quality of pellets produced from torrefied biomass

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  • Rudolfsson, Magnus
  • Borén, Eleonora
  • Pommer, Linda
  • Nordin, Anders
  • Lestander, Torbjörn A.

Abstract

A combined torrefaction and pelletization study was performed at industrially relevant settings using a factorial design. First, wood chips of Scots pine were torrefied at high temperatures (291–315°C) and short residence times (6–12min), facilitating high throughput in a continuous pilot-scale torrefaction process. Then the torrefied materials were pelletized, also in pilot-scale, using varying moisture contents (MCs) (10–14%), sieve sizes (4–6mm), and press channel lengths (PCLs) (25 and 30mm), in all 19 batches, each of 400kg. The resulting so called black pellets exhibited bulk densities of 558–725kgm−3, durabilities of 46.3–86.5%, and fines contents of 3.8–85.8%.

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  • Rudolfsson, Magnus & Borén, Eleonora & Pommer, Linda & Nordin, Anders & Lestander, Torbjörn A., 2017. "Combined effects of torrefaction and pelletization parameters on the quality of pellets produced from torrefied biomass," Applied Energy, Elsevier, vol. 191(C), pages 414-424.
    • Handle: RePEc:eee:appene:v:191:y:2017:i:c:p:414-424
    DOI: 10.1016/j.apenergy.2017.01.035
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