ENERGY CHARACTERISTICS OF BIO-FUEL – CHIPS OF ROBINIA PSEDOACACIA – CLONE NUIRSEGI, GROWN ON PLANTATIONS

Abstract

In this paper, there are presented the results of experimentally determined chemical composition of the combustible in dry mass of energy chips made of the wood species Robinia Psedoacacia – clone Nyirsegi grown on plantations.
The average chemical composition of the combustible of chips of Robinia Psedoacacia –
clone Nyirsegi is: carbon Cdaf = 49,45 %, hydrogen Hdaf = 5,84 %, oxygen Odaf = 43,37 % and
nitrogen Ndaf = 1,33 %. In comparison with combustibles of wood of fully-grown broadleaved trees, the combustible of chips of Robinia Psedoacacia on plantations is characterised by markantly higher share of nitrogen. The share of nitrogen in the combustible of chips of
Robinia Psedoacacia – clone Nyirsegi is 6,5 times higher than the content of nitrogen in the
combustible of chips of Fagus sylvatica. From the environmental aspect, this fact manifests itself in the increased production of emission – concentration of nitrogen oxides NOx in combustion products, which is 4 times higher, than the valid value of emission limit in Slovakia for nitrogen oxides from the process of biomass combustion.