Effects of moisture content, torrefaction temperature, and die temperature in pilot scale pelletizing of torrefied Norway spruce

Larsson, SylviaSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Skogens biomaterial och teknologi,Department of Forest Biomaterials and Technology (author)

Pilot scale pelletizing of torrefied Norway spruce was performed in a factorial design with controlled factors at two levels: material moisture content (11% and 15%) and torrefaction temperature (270 and 300 °C), and die temperature as an uncontrolled factor (60–105 °C). Compared to commercial wood pellets, produced pellets had comparable bulk densities (630–710 kg/m3) but lower pellet durability (80–90%). Energy consumption for pelletizing of torrefied materials was approximately 100% higher than for softwood pelletizing, despite using a much shorter die channel length (35 vs. 55 mm:s), and the amounts of fines were high (10–30%). Die temperature showed a strong positive correlation with pellet production rate. Material moisture content had little influence on pellet quality and production rate, but addition of water created handling problems due to bad flow behavior.

Rudolfsson, MagnusSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Skogens biomaterial och teknologi,Department of Forest Biomaterials and Technology(Swepub:slu)51003 (author)
Nordwaeger, Martin,1983-Umeå universitet,Energiteknik och termisk processkemi,Anders Nordin(Swepub:umu)mannor03 (author)
Olofsson, IngemarUmeå universitet,Energiteknik och termisk processkemi,Anders Nordin(Swepub:umu)inroln98 (author)
Samuelsson, RobertSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Skogens biomaterial och teknologi,Department of Forest Biomaterials and Technology(Swepub:slu)51096 (author)
Sveriges lantbruksuniversitetSkogens biomaterial och teknologi (creator_code:org_t)
Sveriges lantbruksuniversitet

By the author/editor: Larsson, Sylvia; Rudolfsson, Magn ...; Nordwaeger, Mart ...; Olofsson, Ingema ...; Samuelsson, Robe ...

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Mechanical Engin ...; and Energy Engineeri ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Materials Engine ...; and Paper Pulp and F ...

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Materials Engine ...; and Other Materials ...

AGRICULTURAL SCIENCES: AGRICULTURAL SCI ...; and Agriculture Fore ...; and Wood Science

By the university: Umeå University; Swedish University of Agricultural Sciences

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.