Journal
INDUSTRIAL CROPS AND PRODUCTS
Volume 92, Issue -, Pages 42-49Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.indcrop.2016.07.044
Keywords
Cork; Bark; Quercus cerris; Fractionation; Granulometric and densimetric separation
Categories
Funding
- FEDER funds through the Operational Programme for Competitiveness Factors-COMPETE under the project NewCork [38363]
- Strategic Project of Centro de Estudos Florestais [UID/AGR/00239/2013]
- national funding of FCT-Fundacao para a Ciencia e a Tecnologia
- FCT
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Cork-rich Quercus cerris bark collected from Turkey was fractionated in a laboratory and in a pilot-scale equipment to obtain cork and phloem fractions. After a primary trituration as a field post-harvest operation, the cork-rich bark granules were mainly concentrated in the big granules (>12 mm) indicating different mechanical properties of cork and phloem. The smaller granules (<4 mm) could be fractionated using water flotation by separating a floating cork fraction. The pilot-scale fractionation consisted of a mechanical grinding of the whole bark fractions followed by a granulometric and a densimetric separation. The operation was quite efficient and as a result, pure cork (8.4% wt) and cork-rich (18.5% wt) fractions were obtained. The colour analysis and FTIR spectroscopy showed the separation efficiency of the cork fractions. The results show the potential of Q cerris bark for production of valuable cork fractions and the efficiency of combined granulation and fractionation. (C) 2016 Elsevier B.V. All rights reserved.
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