The explained variation by lignin and extractive contents on higher heating value of wood

Published Date
Biomass and Bioenergy
May 2011, Vol.35(5):1663–1667, doi:10.1016/j.biombioe.2010.12.038

• Author 

• C. Telmo ^a,,
 
• J. Lousada ^b

• aUniversity of Trás-os-Montes and Alto Douro (UTAD), Forestry Department, Quinta dos Prados Apartado, 1013-5001-801 Vila Real, Portugal
• bCITAB, Centre for the Research and Technology of Agro-Environment and Biological Sciences UTAD, Quinta dos Prados Apartado, 1013-5001-801 Vila Real, Portugal

Received 27 February 2009. Revised 12 November 2010. Accepted 22 December 2010. Available online 23 February 2011.

Abstract

The Higher Heating Value (HHV) of 17 wood fuels was correlated with their Klason lignin (L) and extractive contents (Ext). There was a highly significant correlation between higher heating value, Klason lignin and extractive contents. The HHV (MJ/kg) of wood fuels as a function of lignin and extractive contents can be calculated using the following equation: qv,gr,d = 14.3377 + 0.1228 (L) + 0.1353 (Ext).

The correlation coefficient (r) was 0.915. The standard error for Klason lignin was 0.017 and to extractive contents of 0.024. The proportion explained by Klason lignin was 56.4% and explained by extractive contents was 43.6%.

Keywords

Higher heating value

Lignin

Extractives

Wood pellets 

Multiple regression

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 Table 1

Table 1.

Fig. 1.

Fig. 2.

Fig. 3.

 Table 2

Table 2.

• ∗ 
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