Tuesday, 25 June 2013

Storage of torrefied pellets

http://www.bioenergy2020.eu/files/publications/pdf/3DO.2.1_Ehrig_etal_paper_homepage.pdf
Ehrig, R., Gugler, H., Kristöfel, C., Pointner, C., Schmutzer-Roseneder, I., Feldmeier, S., . . . Schipfer, F.Economic comparison of torrefaction-based and conventional pellet production-to-end-use chains.


Storage of torrefied pellets

Initial status

Diameter is 8 mm, their moisture content is about 10%.


Method of storage

After one month storage during January and February 2013, the storage pile was snow-covered and first samples were extracted from the surface and from inside the pile.

After storage status

The pellets on the surface

The surface of the pile is completely decomposed and wet
The consistency of the material is loose, crumbly and very similar to flower pot soil.
This layer of wet material had a depth of ca. 30 cm.

The pellet inside the pile

The torrefied pellets are in their original condition

CONCLUSION: The torrefied pellets purchased from the European market are not hydrophobic and their suitability for uncovered storage is limited.
RECOMMENDATION: The torrefied pellets should be handled, transported and stored similar to wood pellets.


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