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Energies 2017, 10(10), 1455; doi:10.3390/en10101455

How Wood Fuels’ Quality Relates to the Standards: A Class-Modelling Approach

Università degli Studi di Padova, Department of Land, Environment, Agriculture and Forestry, Laboratorio Analisi BioCombustibili, Viale dell’Università 16, 35020 Legnaro, Padova, Italy
Consiglio per la ricerca in agricoltura e l’analisi dell’economia agraria (CREA), Centro di Ricerca per l’Ingegneria e le Trasformazioni Agro-alimentari (CREA-IT), Via della Pascolare 16, 00015 Monterotondo Scalo, Rome, Italy
Norwegian Institute of Bioeconomy Research, Pb 115, NO-1431 Ås, Norway
Authors to whom correspondence should be addressed.
Received: 21 July 2017 / Revised: 14 September 2017 / Accepted: 18 September 2017 / Published: 21 September 2017
(This article belongs to the Section Energy Sources)
View Full-Text   |   Download PDF [2130 KB, uploaded 25 September 2017]   |  


The quality requirements of wood biofuels are regulated by a series of harmonized international standards. These standards define the technical parameter limits that influence the quality of solid biomass as a fuel. In 2014 the European reference standard for solid biofuel was replaced by the International ISO standard. In the case of wood chips, the main difference between the European and International standards is the definition of particle size distribution classes. In this context, this study analyses the quality of wood chips and its variation over the years according to the “former” (EN 14691-4) and “in force” (ISO 17225-4) standards. A Soft Independent Modelling of Class Analogy (SIMCA) model was built to predict the best quality of wood chips and to clarify the relationship between quality and standard parameters, time and changes in the standard regulations. The results show that, compared to the EN standards, classification with the ISO standards increases the samples belonging to the best quality classes and decreases the not classified samples. Furthermore, all the SIMCA models have a high sensitivity (>90%), reflect the differences introduced to the quality standards and are therefore suitable for monitoring the quality of wood chips and their changes. View Full-Text
Keywords: wood biomass; wood chips; quality; certification; standard; multivariate modelling wood biomass; wood chips; quality; certification; standard; multivariate modelling

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Zanetti, M.; Costa, C.; Greco, R.; Grigolato, S.; Ottaviani Aalmo, G.; Cavalli, R. How Wood Fuels’ Quality Relates to the Standards: A Class-Modelling Approach. Energies 2017, 10, 1455.

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