Propriedades energéticas em clones de eucalipto

Abstract

Faced with increasing interest in energy forests in reducing the dependence of fossil fuels and for agricultural and steel use, it is necessary to know the most productive genetic materials in energy and with a more homogeneous structure so that the burning process is efficient and consequently cheap. In this sense, the present work seeks to evaluate the specific mass, calorific value and energy efficiency of two hybrid clones of Eucalyptus urophylla x Eucalyptus grandis, commercially known as I-144 and H-13, considering age interference. The clones analyzed had ages of three, four and five years, in a spacing of 3.0 x 2.0 meters belonging to Girassol Agrícola, in the city of Jaciara, MT. It was determined the immediate and elemental chemical composition, humidity, specific mass, calorific power and energy stored per hectare. In general, with increasing age, the levels of ash, nitrogen and sulfur decreased, contributing to energy efficiency. The clones can be considered similar in relation to carbon, hydrogen, oxygen, specific mass, humidity, calorific value and amount of stored energy. The age of four years stood out among the others positively for the moisture content, specific mass, energy stored and for clone I-144 in the same characteristics. The calorific value at four years also stood out in relation to the other ages, however the highest value was obtained by clone H-13, showing that calorific power did not influence stored stock of energy per hectare.